diff --git a/c++/greptime/v1/common.pb.cc b/c++/greptime/v1/common.pb.cc
index 43ad3751..4ae0373f 100644
--- a/c++/greptime/v1/common.pb.cc
+++ b/c++/greptime/v1/common.pb.cc
@@ -187,6 +187,19 @@ struct MetricsDefaultTypeInternal {
   };
 };
 PROTOBUF_ATTRIBUTE_NO_DESTROY PROTOBUF_CONSTINIT PROTOBUF_ATTRIBUTE_INIT_PRIORITY1 MetricsDefaultTypeInternal _Metrics_default_instance_;
+PROTOBUF_CONSTEXPR ExpireAfter::ExpireAfter(
+    ::_pbi::ConstantInitialized): _impl_{
+    /*decltype(_impl_.value_)*/int64_t{0}
+  , /*decltype(_impl_._cached_size_)*/{}} {}
+struct ExpireAfterDefaultTypeInternal {
+  PROTOBUF_CONSTEXPR ExpireAfterDefaultTypeInternal()
+      : _instance(::_pbi::ConstantInitialized{}) {}
+  ~ExpireAfterDefaultTypeInternal() {}
+  union {
+    ExpireAfter _instance;
+  };
+};
+PROTOBUF_ATTRIBUTE_NO_DESTROY PROTOBUF_CONSTINIT PROTOBUF_ATTRIBUTE_INIT_PRIORITY1 ExpireAfterDefaultTypeInternal _ExpireAfter_default_instance_;
 PROTOBUF_CONSTEXPR FlightMetadata::FlightMetadata(
     ::_pbi::ConstantInitialized): _impl_{
     /*decltype(_impl_.affected_rows_)*/nullptr
@@ -260,7 +273,7 @@ struct DecimalTypeExtensionDefaultTypeInternal {
 PROTOBUF_ATTRIBUTE_NO_DESTROY PROTOBUF_CONSTINIT PROTOBUF_ATTRIBUTE_INIT_PRIORITY1 DecimalTypeExtensionDefaultTypeInternal _DecimalTypeExtension_default_instance_;
 }  // namespace v1
 }  // namespace greptime
-static ::_pb::Metadata file_level_metadata_greptime_2fv1_2fcommon_2eproto[17];
+static ::_pb::Metadata file_level_metadata_greptime_2fv1_2fcommon_2eproto[18];
 static const ::_pb::EnumDescriptor* file_level_enum_descriptors_greptime_2fv1_2fcommon_2eproto[2];
 static constexpr ::_pb::ServiceDescriptor const** file_level_service_descriptors_greptime_2fv1_2fcommon_2eproto = nullptr;
 
@@ -370,6 +383,13 @@ const uint32_t TableStruct_greptime_2fv1_2fcommon_2eproto::offsets[] PROTOBUF_SE
   ~0u,  // no _inlined_string_donated_
   PROTOBUF_FIELD_OFFSET(::greptime::v1::Metrics, _impl_.metrics_),
   ~0u,  // no _has_bits_
+  PROTOBUF_FIELD_OFFSET(::greptime::v1::ExpireAfter, _internal_metadata_),
+  ~0u,  // no _extensions_
+  ~0u,  // no _oneof_case_
+  ~0u,  // no _weak_field_map_
+  ~0u,  // no _inlined_string_donated_
+  PROTOBUF_FIELD_OFFSET(::greptime::v1::ExpireAfter, _impl_.value_),
+  ~0u,  // no _has_bits_
   PROTOBUF_FIELD_OFFSET(::greptime::v1::FlightMetadata, _internal_metadata_),
   ~0u,  // no _extensions_
   ~0u,  // no _oneof_case_
@@ -424,11 +444,12 @@ static const ::_pbi::MigrationSchema schemas[] PROTOBUF_SECTION_VARIABLE(protode
   { 81, -1, -1, sizeof(::greptime::v1::TableName)},
   { 90, -1, -1, sizeof(::greptime::v1::AffectedRows)},
   { 97, -1, -1, sizeof(::greptime::v1::Metrics)},
-  { 104, -1, -1, sizeof(::greptime::v1::FlightMetadata)},
-  { 112, -1, -1, sizeof(::greptime::v1::IntervalMonthDayNano)},
-  { 121, -1, -1, sizeof(::greptime::v1::Decimal128)},
-  { 129, -1, -1, sizeof(::greptime::v1::ColumnDataTypeExtension)},
-  { 137, -1, -1, sizeof(::greptime::v1::DecimalTypeExtension)},
+  { 104, -1, -1, sizeof(::greptime::v1::ExpireAfter)},
+  { 111, -1, -1, sizeof(::greptime::v1::FlightMetadata)},
+  { 119, -1, -1, sizeof(::greptime::v1::IntervalMonthDayNano)},
+  { 128, -1, -1, sizeof(::greptime::v1::Decimal128)},
+  { 136, -1, -1, sizeof(::greptime::v1::ColumnDataTypeExtension)},
+  { 144, -1, -1, sizeof(::greptime::v1::DecimalTypeExtension)},
 };
 
 static const ::_pb::Message* const file_default_instances[] = {
@@ -444,6 +465,7 @@ static const ::_pb::Message* const file_default_instances[] = {
   &::greptime::v1::_TableName_default_instance_._instance,
   &::greptime::v1::_AffectedRows_default_instance_._instance,
   &::greptime::v1::_Metrics_default_instance_._instance,
+  &::greptime::v1::_ExpireAfter_default_instance_._instance,
   &::greptime::v1::_FlightMetadata_default_instance_._instance,
   &::greptime::v1::_IntervalMonthDayNano_default_instance_._instance,
   &::greptime::v1::_Decimal128_default_instance_._instance,
@@ -474,38 +496,39 @@ const char descriptor_table_protodef_greptime_2fv1_2fcommon_2eproto[] PROTOBUF_S
   "\n\005token\030\001 \001(\t\"J\n\tTableName\022\024\n\014catalog_na"
   "me\030\001 \001(\t\022\023\n\013schema_name\030\002 \001(\t\022\022\n\ntable_n"
   "ame\030\003 \001(\t\"\035\n\014AffectedRows\022\r\n\005value\030\001 \001(\r"
-  "\"\032\n\007Metrics\022\017\n\007metrics\030\001 \001(\014\"i\n\016FlightMe"
-  "tadata\0220\n\raffected_rows\030\001 \001(\0132\031.greptime"
-  ".v1.AffectedRows\022%\n\007metrics\030\002 \001(\0132\024.grep"
-  "time.v1.Metrics\"I\n\024IntervalMonthDayNano\022"
-  "\016\n\006months\030\001 \001(\005\022\014\n\004days\030\002 \001(\005\022\023\n\013nanosec"
-  "onds\030\003 \001(\003\"$\n\nDecimal128\022\n\n\002hi\030\001 \001(\003\022\n\n\002"
-  "lo\030\002 \001(\003\"`\n\027ColumnDataTypeExtension\0229\n\014d"
-  "ecimal_type\030\001 \001(\0132!.greptime.v1.DecimalT"
-  "ypeExtensionH\000B\n\n\010type_ext\"8\n\024DecimalTyp"
-  "eExtension\022\021\n\tprecision\030\001 \001(\005\022\r\n\005scale\030\002"
-  " \001(\005*1\n\014SemanticType\022\007\n\003TAG\020\000\022\t\n\005FIELD\020\001"
-  "\022\r\n\tTIMESTAMP\020\002*\326\003\n\016ColumnDataType\022\013\n\007BO"
-  "OLEAN\020\000\022\010\n\004INT8\020\001\022\t\n\005INT16\020\002\022\t\n\005INT32\020\003\022"
-  "\t\n\005INT64\020\004\022\t\n\005UINT8\020\005\022\n\n\006UINT16\020\006\022\n\n\006UIN"
-  "T32\020\007\022\n\n\006UINT64\020\010\022\013\n\007FLOAT32\020\t\022\013\n\007FLOAT6"
-  "4\020\n\022\n\n\006BINARY\020\013\022\n\n\006STRING\020\014\022\010\n\004DATE\020\r\022\014\n"
-  "\010DATETIME\020\016\022\024\n\020TIMESTAMP_SECOND\020\017\022\031\n\025TIM"
-  "ESTAMP_MILLISECOND\020\020\022\031\n\025TIMESTAMP_MICROS"
-  "ECOND\020\021\022\030\n\024TIMESTAMP_NANOSECOND\020\022\022\017\n\013TIM"
-  "E_SECOND\020\023\022\024\n\020TIME_MILLISECOND\020\024\022\024\n\020TIME"
-  "_MICROSECOND\020\025\022\023\n\017TIME_NANOSECOND\020\026\022\027\n\023I"
-  "NTERVAL_YEAR_MONTH\020\027\022\025\n\021INTERVAL_DAY_TIM"
-  "E\020\030\022\033\n\027INTERVAL_MONTH_DAY_NANO\020\031\022\016\n\nDECI"
-  "MAL128\020\036BO\n\016io.greptime.v1B\006CommonZ5gith"
-  "ub.com/GreptimeTeam/greptime-proto/go/gr"
-  "eptime/v1b\006proto3"
+  "\"\032\n\007Metrics\022\017\n\007metrics\030\001 \001(\014\"\034\n\013ExpireAf"
+  "ter\022\r\n\005value\030\001 \001(\003\"i\n\016FlightMetadata\0220\n\r"
+  "affected_rows\030\001 \001(\0132\031.greptime.v1.Affect"
+  "edRows\022%\n\007metrics\030\002 \001(\0132\024.greptime.v1.Me"
+  "trics\"I\n\024IntervalMonthDayNano\022\016\n\006months\030"
+  "\001 \001(\005\022\014\n\004days\030\002 \001(\005\022\023\n\013nanoseconds\030\003 \001(\003"
+  "\"$\n\nDecimal128\022\n\n\002hi\030\001 \001(\003\022\n\n\002lo\030\002 \001(\003\"`"
+  "\n\027ColumnDataTypeExtension\0229\n\014decimal_typ"
+  "e\030\001 \001(\0132!.greptime.v1.DecimalTypeExtensi"
+  "onH\000B\n\n\010type_ext\"8\n\024DecimalTypeExtension"
+  "\022\021\n\tprecision\030\001 \001(\005\022\r\n\005scale\030\002 \001(\005*1\n\014Se"
+  "manticType\022\007\n\003TAG\020\000\022\t\n\005FIELD\020\001\022\r\n\tTIMEST"
+  "AMP\020\002*\326\003\n\016ColumnDataType\022\013\n\007BOOLEAN\020\000\022\010\n"
+  "\004INT8\020\001\022\t\n\005INT16\020\002\022\t\n\005INT32\020\003\022\t\n\005INT64\020\004"
+  "\022\t\n\005UINT8\020\005\022\n\n\006UINT16\020\006\022\n\n\006UINT32\020\007\022\n\n\006U"
+  "INT64\020\010\022\013\n\007FLOAT32\020\t\022\013\n\007FLOAT64\020\n\022\n\n\006BIN"
+  "ARY\020\013\022\n\n\006STRING\020\014\022\010\n\004DATE\020\r\022\014\n\010DATETIME\020"
+  "\016\022\024\n\020TIMESTAMP_SECOND\020\017\022\031\n\025TIMESTAMP_MIL"
+  "LISECOND\020\020\022\031\n\025TIMESTAMP_MICROSECOND\020\021\022\030\n"
+  "\024TIMESTAMP_NANOSECOND\020\022\022\017\n\013TIME_SECOND\020\023"
+  "\022\024\n\020TIME_MILLISECOND\020\024\022\024\n\020TIME_MICROSECO"
+  "ND\020\025\022\023\n\017TIME_NANOSECOND\020\026\022\027\n\023INTERVAL_YE"
+  "AR_MONTH\020\027\022\025\n\021INTERVAL_DAY_TIME\020\030\022\033\n\027INT"
+  "ERVAL_MONTH_DAY_NANO\020\031\022\016\n\nDECIMAL128\020\036BO"
+  "\n\016io.greptime.v1B\006CommonZ5github.com/Gre"
+  "ptimeTeam/greptime-proto/go/greptime/v1b"
+  "\006proto3"
   ;
 static ::_pbi::once_flag descriptor_table_greptime_2fv1_2fcommon_2eproto_once;
 const ::_pbi::DescriptorTable descriptor_table_greptime_2fv1_2fcommon_2eproto = {
-    false, false, 1897, descriptor_table_protodef_greptime_2fv1_2fcommon_2eproto,
+    false, false, 1927, descriptor_table_protodef_greptime_2fv1_2fcommon_2eproto,
     "greptime/v1/common.proto",
-    &descriptor_table_greptime_2fv1_2fcommon_2eproto_once, nullptr, 0, 17,
+    &descriptor_table_greptime_2fv1_2fcommon_2eproto_once, nullptr, 0, 18,
     schemas, file_default_instances, TableStruct_greptime_2fv1_2fcommon_2eproto::offsets,
     file_level_metadata_greptime_2fv1_2fcommon_2eproto, file_level_enum_descriptors_greptime_2fv1_2fcommon_2eproto,
     file_level_service_descriptors_greptime_2fv1_2fcommon_2eproto,
@@ -3300,6 +3323,184 @@ ::PROTOBUF_NAMESPACE_ID::Metadata Metrics::GetMetadata() const {
 
 // ===================================================================
 
+class ExpireAfter::_Internal {
+ public:
+};
+
+ExpireAfter::ExpireAfter(::PROTOBUF_NAMESPACE_ID::Arena* arena,
+                         bool is_message_owned)
+  : ::PROTOBUF_NAMESPACE_ID::Message(arena, is_message_owned) {
+  SharedCtor(arena, is_message_owned);
+  // @@protoc_insertion_point(arena_constructor:greptime.v1.ExpireAfter)
+}
+ExpireAfter::ExpireAfter(const ExpireAfter& from)
+  : ::PROTOBUF_NAMESPACE_ID::Message() {
+  ExpireAfter* const _this = this; (void)_this;
+  new (&_impl_) Impl_{
+      decltype(_impl_.value_){}
+    , /*decltype(_impl_._cached_size_)*/{}};
+
+  _internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
+  _this->_impl_.value_ = from._impl_.value_;
+  // @@protoc_insertion_point(copy_constructor:greptime.v1.ExpireAfter)
+}
+
+inline void ExpireAfter::SharedCtor(
+    ::_pb::Arena* arena, bool is_message_owned) {
+  (void)arena;
+  (void)is_message_owned;
+  new (&_impl_) Impl_{
+      decltype(_impl_.value_){int64_t{0}}
+    , /*decltype(_impl_._cached_size_)*/{}
+  };
+}
+
+ExpireAfter::~ExpireAfter() {
+  // @@protoc_insertion_point(destructor:greptime.v1.ExpireAfter)
+  if (auto *arena = _internal_metadata_.DeleteReturnArena<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>()) {
+  (void)arena;
+    return;
+  }
+  SharedDtor();
+}
+
+inline void ExpireAfter::SharedDtor() {
+  GOOGLE_DCHECK(GetArenaForAllocation() == nullptr);
+}
+
+void ExpireAfter::SetCachedSize(int size) const {
+  _impl_._cached_size_.Set(size);
+}
+
+void ExpireAfter::Clear() {
+// @@protoc_insertion_point(message_clear_start:greptime.v1.ExpireAfter)
+  uint32_t cached_has_bits = 0;
+  // Prevent compiler warnings about cached_has_bits being unused
+  (void) cached_has_bits;
+
+  _impl_.value_ = int64_t{0};
+  _internal_metadata_.Clear<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>();
+}
+
+const char* ExpireAfter::_InternalParse(const char* ptr, ::_pbi::ParseContext* ctx) {
+#define CHK_(x) if (PROTOBUF_PREDICT_FALSE(!(x))) goto failure
+  while (!ctx->Done(&ptr)) {
+    uint32_t tag;
+    ptr = ::_pbi::ReadTag(ptr, &tag);
+    switch (tag >> 3) {
+      // int64 value = 1;
+      case 1:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 8)) {
+          _impl_.value_ = ::PROTOBUF_NAMESPACE_ID::internal::ReadVarint64(&ptr);
+          CHK_(ptr);
+        } else
+          goto handle_unusual;
+        continue;
+      default:
+        goto handle_unusual;
+    }  // switch
+  handle_unusual:
+    if ((tag == 0) || ((tag & 7) == 4)) {
+      CHK_(ptr);
+      ctx->SetLastTag(tag);
+      goto message_done;
+    }
+    ptr = UnknownFieldParse(
+        tag,
+        _internal_metadata_.mutable_unknown_fields<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(),
+        ptr, ctx);
+    CHK_(ptr != nullptr);
+  }  // while
+message_done:
+  return ptr;
+failure:
+  ptr = nullptr;
+  goto message_done;
+#undef CHK_
+}
+
+uint8_t* ExpireAfter::_InternalSerialize(
+    uint8_t* target, ::PROTOBUF_NAMESPACE_ID::io::EpsCopyOutputStream* stream) const {
+  // @@protoc_insertion_point(serialize_to_array_start:greptime.v1.ExpireAfter)
+  uint32_t cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  // int64 value = 1;
+  if (this->_internal_value() != 0) {
+    target = stream->EnsureSpace(target);
+    target = ::_pbi::WireFormatLite::WriteInt64ToArray(1, this->_internal_value(), target);
+  }
+
+  if (PROTOBUF_PREDICT_FALSE(_internal_metadata_.have_unknown_fields())) {
+    target = ::_pbi::WireFormat::InternalSerializeUnknownFieldsToArray(
+        _internal_metadata_.unknown_fields<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(::PROTOBUF_NAMESPACE_ID::UnknownFieldSet::default_instance), target, stream);
+  }
+  // @@protoc_insertion_point(serialize_to_array_end:greptime.v1.ExpireAfter)
+  return target;
+}
+
+size_t ExpireAfter::ByteSizeLong() const {
+// @@protoc_insertion_point(message_byte_size_start:greptime.v1.ExpireAfter)
+  size_t total_size = 0;
+
+  uint32_t cached_has_bits = 0;
+  // Prevent compiler warnings about cached_has_bits being unused
+  (void) cached_has_bits;
+
+  // int64 value = 1;
+  if (this->_internal_value() != 0) {
+    total_size += ::_pbi::WireFormatLite::Int64SizePlusOne(this->_internal_value());
+  }
+
+  return MaybeComputeUnknownFieldsSize(total_size, &_impl_._cached_size_);
+}
+
+const ::PROTOBUF_NAMESPACE_ID::Message::ClassData ExpireAfter::_class_data_ = {
+    ::PROTOBUF_NAMESPACE_ID::Message::CopyWithSourceCheck,
+    ExpireAfter::MergeImpl
+};
+const ::PROTOBUF_NAMESPACE_ID::Message::ClassData*ExpireAfter::GetClassData() const { return &_class_data_; }
+
+
+void ExpireAfter::MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const ::PROTOBUF_NAMESPACE_ID::Message& from_msg) {
+  auto* const _this = static_cast<ExpireAfter*>(&to_msg);
+  auto& from = static_cast<const ExpireAfter&>(from_msg);
+  // @@protoc_insertion_point(class_specific_merge_from_start:greptime.v1.ExpireAfter)
+  GOOGLE_DCHECK_NE(&from, _this);
+  uint32_t cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  if (from._internal_value() != 0) {
+    _this->_internal_set_value(from._internal_value());
+  }
+  _this->_internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
+}
+
+void ExpireAfter::CopyFrom(const ExpireAfter& from) {
+// @@protoc_insertion_point(class_specific_copy_from_start:greptime.v1.ExpireAfter)
+  if (&from == this) return;
+  Clear();
+  MergeFrom(from);
+}
+
+bool ExpireAfter::IsInitialized() const {
+  return true;
+}
+
+void ExpireAfter::InternalSwap(ExpireAfter* other) {
+  using std::swap;
+  _internal_metadata_.InternalSwap(&other->_internal_metadata_);
+  swap(_impl_.value_, other->_impl_.value_);
+}
+
+::PROTOBUF_NAMESPACE_ID::Metadata ExpireAfter::GetMetadata() const {
+  return ::_pbi::AssignDescriptors(
+      &descriptor_table_greptime_2fv1_2fcommon_2eproto_getter, &descriptor_table_greptime_2fv1_2fcommon_2eproto_once,
+      file_level_metadata_greptime_2fv1_2fcommon_2eproto[12]);
+}
+
+// ===================================================================
+
 class FlightMetadata::_Internal {
  public:
   static const ::greptime::v1::AffectedRows& affected_rows(const FlightMetadata* msg);
@@ -3534,7 +3735,7 @@ void FlightMetadata::InternalSwap(FlightMetadata* other) {
 ::PROTOBUF_NAMESPACE_ID::Metadata FlightMetadata::GetMetadata() const {
   return ::_pbi::AssignDescriptors(
       &descriptor_table_greptime_2fv1_2fcommon_2eproto_getter, &descriptor_table_greptime_2fv1_2fcommon_2eproto_once,
-      file_level_metadata_greptime_2fv1_2fcommon_2eproto[12]);
+      file_level_metadata_greptime_2fv1_2fcommon_2eproto[13]);
 }
 
 // ===================================================================
@@ -3769,7 +3970,7 @@ void IntervalMonthDayNano::InternalSwap(IntervalMonthDayNano* other) {
 ::PROTOBUF_NAMESPACE_ID::Metadata IntervalMonthDayNano::GetMetadata() const {
   return ::_pbi::AssignDescriptors(
       &descriptor_table_greptime_2fv1_2fcommon_2eproto_getter, &descriptor_table_greptime_2fv1_2fcommon_2eproto_once,
-      file_level_metadata_greptime_2fv1_2fcommon_2eproto[13]);
+      file_level_metadata_greptime_2fv1_2fcommon_2eproto[14]);
 }
 
 // ===================================================================
@@ -3980,7 +4181,7 @@ void Decimal128::InternalSwap(Decimal128* other) {
 ::PROTOBUF_NAMESPACE_ID::Metadata Decimal128::GetMetadata() const {
   return ::_pbi::AssignDescriptors(
       &descriptor_table_greptime_2fv1_2fcommon_2eproto_getter, &descriptor_table_greptime_2fv1_2fcommon_2eproto_once,
-      file_level_metadata_greptime_2fv1_2fcommon_2eproto[14]);
+      file_level_metadata_greptime_2fv1_2fcommon_2eproto[15]);
 }
 
 // ===================================================================
@@ -4227,7 +4428,7 @@ void ColumnDataTypeExtension::InternalSwap(ColumnDataTypeExtension* other) {
 ::PROTOBUF_NAMESPACE_ID::Metadata ColumnDataTypeExtension::GetMetadata() const {
   return ::_pbi::AssignDescriptors(
       &descriptor_table_greptime_2fv1_2fcommon_2eproto_getter, &descriptor_table_greptime_2fv1_2fcommon_2eproto_once,
-      file_level_metadata_greptime_2fv1_2fcommon_2eproto[15]);
+      file_level_metadata_greptime_2fv1_2fcommon_2eproto[16]);
 }
 
 // ===================================================================
@@ -4438,7 +4639,7 @@ void DecimalTypeExtension::InternalSwap(DecimalTypeExtension* other) {
 ::PROTOBUF_NAMESPACE_ID::Metadata DecimalTypeExtension::GetMetadata() const {
   return ::_pbi::AssignDescriptors(
       &descriptor_table_greptime_2fv1_2fcommon_2eproto_getter, &descriptor_table_greptime_2fv1_2fcommon_2eproto_once,
-      file_level_metadata_greptime_2fv1_2fcommon_2eproto[16]);
+      file_level_metadata_greptime_2fv1_2fcommon_2eproto[17]);
 }
 
 // @@protoc_insertion_point(namespace_scope)
@@ -4493,6 +4694,10 @@ template<> PROTOBUF_NOINLINE ::greptime::v1::Metrics*
 Arena::CreateMaybeMessage< ::greptime::v1::Metrics >(Arena* arena) {
   return Arena::CreateMessageInternal< ::greptime::v1::Metrics >(arena);
 }
+template<> PROTOBUF_NOINLINE ::greptime::v1::ExpireAfter*
+Arena::CreateMaybeMessage< ::greptime::v1::ExpireAfter >(Arena* arena) {
+  return Arena::CreateMessageInternal< ::greptime::v1::ExpireAfter >(arena);
+}
 template<> PROTOBUF_NOINLINE ::greptime::v1::FlightMetadata*
 Arena::CreateMaybeMessage< ::greptime::v1::FlightMetadata >(Arena* arena) {
   return Arena::CreateMessageInternal< ::greptime::v1::FlightMetadata >(arena);
diff --git a/c++/greptime/v1/common.pb.h b/c++/greptime/v1/common.pb.h
index 816cad96..6cd053ea 100644
--- a/c++/greptime/v1/common.pb.h
+++ b/c++/greptime/v1/common.pb.h
@@ -68,6 +68,9 @@ extern Decimal128DefaultTypeInternal _Decimal128_default_instance_;
 class DecimalTypeExtension;
 struct DecimalTypeExtensionDefaultTypeInternal;
 extern DecimalTypeExtensionDefaultTypeInternal _DecimalTypeExtension_default_instance_;
+class ExpireAfter;
+struct ExpireAfterDefaultTypeInternal;
+extern ExpireAfterDefaultTypeInternal _ExpireAfter_default_instance_;
 class FlightMetadata;
 struct FlightMetadataDefaultTypeInternal;
 extern FlightMetadataDefaultTypeInternal _FlightMetadata_default_instance_;
@@ -110,6 +113,7 @@ template<> ::greptime::v1::Basic* Arena::CreateMaybeMessage<::greptime::v1::Basi
 template<> ::greptime::v1::ColumnDataTypeExtension* Arena::CreateMaybeMessage<::greptime::v1::ColumnDataTypeExtension>(Arena*);
 template<> ::greptime::v1::Decimal128* Arena::CreateMaybeMessage<::greptime::v1::Decimal128>(Arena*);
 template<> ::greptime::v1::DecimalTypeExtension* Arena::CreateMaybeMessage<::greptime::v1::DecimalTypeExtension>(Arena*);
+template<> ::greptime::v1::ExpireAfter* Arena::CreateMaybeMessage<::greptime::v1::ExpireAfter>(Arena*);
 template<> ::greptime::v1::FlightMetadata* Arena::CreateMaybeMessage<::greptime::v1::FlightMetadata>(Arena*);
 template<> ::greptime::v1::IntervalMonthDayNano* Arena::CreateMaybeMessage<::greptime::v1::IntervalMonthDayNano>(Arena*);
 template<> ::greptime::v1::Metrics* Arena::CreateMaybeMessage<::greptime::v1::Metrics>(Arena*);
@@ -2042,6 +2046,154 @@ class Metrics final :
 };
 // -------------------------------------------------------------------
 
+class ExpireAfter final :
+    public ::PROTOBUF_NAMESPACE_ID::Message /* @@protoc_insertion_point(class_definition:greptime.v1.ExpireAfter) */ {
+ public:
+  inline ExpireAfter() : ExpireAfter(nullptr) {}
+  ~ExpireAfter() override;
+  explicit PROTOBUF_CONSTEXPR ExpireAfter(::PROTOBUF_NAMESPACE_ID::internal::ConstantInitialized);
+
+  ExpireAfter(const ExpireAfter& from);
+  ExpireAfter(ExpireAfter&& from) noexcept
+    : ExpireAfter() {
+    *this = ::std::move(from);
+  }
+
+  inline ExpireAfter& operator=(const ExpireAfter& from) {
+    CopyFrom(from);
+    return *this;
+  }
+  inline ExpireAfter& operator=(ExpireAfter&& from) noexcept {
+    if (this == &from) return *this;
+    if (GetOwningArena() == from.GetOwningArena()
+  #ifdef PROTOBUF_FORCE_COPY_IN_MOVE
+        && GetOwningArena() != nullptr
+  #endif  // !PROTOBUF_FORCE_COPY_IN_MOVE
+    ) {
+      InternalSwap(&from);
+    } else {
+      CopyFrom(from);
+    }
+    return *this;
+  }
+
+  static const ::PROTOBUF_NAMESPACE_ID::Descriptor* descriptor() {
+    return GetDescriptor();
+  }
+  static const ::PROTOBUF_NAMESPACE_ID::Descriptor* GetDescriptor() {
+    return default_instance().GetMetadata().descriptor;
+  }
+  static const ::PROTOBUF_NAMESPACE_ID::Reflection* GetReflection() {
+    return default_instance().GetMetadata().reflection;
+  }
+  static const ExpireAfter& default_instance() {
+    return *internal_default_instance();
+  }
+  static inline const ExpireAfter* internal_default_instance() {
+    return reinterpret_cast<const ExpireAfter*>(
+               &_ExpireAfter_default_instance_);
+  }
+  static constexpr int kIndexInFileMessages =
+    12;
+
+  friend void swap(ExpireAfter& a, ExpireAfter& b) {
+    a.Swap(&b);
+  }
+  inline void Swap(ExpireAfter* other) {
+    if (other == this) return;
+  #ifdef PROTOBUF_FORCE_COPY_IN_SWAP
+    if (GetOwningArena() != nullptr &&
+        GetOwningArena() == other->GetOwningArena()) {
+   #else  // PROTOBUF_FORCE_COPY_IN_SWAP
+    if (GetOwningArena() == other->GetOwningArena()) {
+  #endif  // !PROTOBUF_FORCE_COPY_IN_SWAP
+      InternalSwap(other);
+    } else {
+      ::PROTOBUF_NAMESPACE_ID::internal::GenericSwap(this, other);
+    }
+  }
+  void UnsafeArenaSwap(ExpireAfter* other) {
+    if (other == this) return;
+    GOOGLE_DCHECK(GetOwningArena() == other->GetOwningArena());
+    InternalSwap(other);
+  }
+
+  // implements Message ----------------------------------------------
+
+  ExpireAfter* New(::PROTOBUF_NAMESPACE_ID::Arena* arena = nullptr) const final {
+    return CreateMaybeMessage<ExpireAfter>(arena);
+  }
+  using ::PROTOBUF_NAMESPACE_ID::Message::CopyFrom;
+  void CopyFrom(const ExpireAfter& from);
+  using ::PROTOBUF_NAMESPACE_ID::Message::MergeFrom;
+  void MergeFrom( const ExpireAfter& from) {
+    ExpireAfter::MergeImpl(*this, from);
+  }
+  private:
+  static void MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const ::PROTOBUF_NAMESPACE_ID::Message& from_msg);
+  public:
+  PROTOBUF_ATTRIBUTE_REINITIALIZES void Clear() final;
+  bool IsInitialized() const final;
+
+  size_t ByteSizeLong() const final;
+  const char* _InternalParse(const char* ptr, ::PROTOBUF_NAMESPACE_ID::internal::ParseContext* ctx) final;
+  uint8_t* _InternalSerialize(
+      uint8_t* target, ::PROTOBUF_NAMESPACE_ID::io::EpsCopyOutputStream* stream) const final;
+  int GetCachedSize() const final { return _impl_._cached_size_.Get(); }
+
+  private:
+  void SharedCtor(::PROTOBUF_NAMESPACE_ID::Arena* arena, bool is_message_owned);
+  void SharedDtor();
+  void SetCachedSize(int size) const final;
+  void InternalSwap(ExpireAfter* other);
+
+  private:
+  friend class ::PROTOBUF_NAMESPACE_ID::internal::AnyMetadata;
+  static ::PROTOBUF_NAMESPACE_ID::StringPiece FullMessageName() {
+    return "greptime.v1.ExpireAfter";
+  }
+  protected:
+  explicit ExpireAfter(::PROTOBUF_NAMESPACE_ID::Arena* arena,
+                       bool is_message_owned = false);
+  public:
+
+  static const ClassData _class_data_;
+  const ::PROTOBUF_NAMESPACE_ID::Message::ClassData*GetClassData() const final;
+
+  ::PROTOBUF_NAMESPACE_ID::Metadata GetMetadata() const final;
+
+  // nested types ----------------------------------------------------
+
+  // accessors -------------------------------------------------------
+
+  enum : int {
+    kValueFieldNumber = 1,
+  };
+  // int64 value = 1;
+  void clear_value();
+  int64_t value() const;
+  void set_value(int64_t value);
+  private:
+  int64_t _internal_value() const;
+  void _internal_set_value(int64_t value);
+  public:
+
+  // @@protoc_insertion_point(class_scope:greptime.v1.ExpireAfter)
+ private:
+  class _Internal;
+
+  template <typename T> friend class ::PROTOBUF_NAMESPACE_ID::Arena::InternalHelper;
+  typedef void InternalArenaConstructable_;
+  typedef void DestructorSkippable_;
+  struct Impl_ {
+    int64_t value_;
+    mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
+  };
+  union { Impl_ _impl_; };
+  friend struct ::TableStruct_greptime_2fv1_2fcommon_2eproto;
+};
+// -------------------------------------------------------------------
+
 class FlightMetadata final :
     public ::PROTOBUF_NAMESPACE_ID::Message /* @@protoc_insertion_point(class_definition:greptime.v1.FlightMetadata) */ {
  public:
@@ -2090,7 +2242,7 @@ class FlightMetadata final :
                &_FlightMetadata_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    12;
+    13;
 
   friend void swap(FlightMetadata& a, FlightMetadata& b) {
     a.Swap(&b);
@@ -2267,7 +2419,7 @@ class IntervalMonthDayNano final :
                &_IntervalMonthDayNano_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    13;
+    14;
 
   friend void swap(IntervalMonthDayNano& a, IntervalMonthDayNano& b) {
     a.Swap(&b);
@@ -2437,7 +2589,7 @@ class Decimal128 final :
                &_Decimal128_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    14;
+    15;
 
   friend void swap(Decimal128& a, Decimal128& b) {
     a.Swap(&b);
@@ -2601,7 +2753,7 @@ class ColumnDataTypeExtension final :
                &_ColumnDataTypeExtension_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    15;
+    16;
 
   friend void swap(ColumnDataTypeExtension& a, ColumnDataTypeExtension& b) {
     a.Swap(&b);
@@ -2770,7 +2922,7 @@ class DecimalTypeExtension final :
                &_DecimalTypeExtension_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    16;
+    17;
 
   friend void swap(DecimalTypeExtension& a, DecimalTypeExtension& b) {
     a.Swap(&b);
@@ -4117,6 +4269,30 @@ inline void Metrics::set_allocated_metrics(std::string* metrics) {
 
 // -------------------------------------------------------------------
 
+// ExpireAfter
+
+// int64 value = 1;
+inline void ExpireAfter::clear_value() {
+  _impl_.value_ = int64_t{0};
+}
+inline int64_t ExpireAfter::_internal_value() const {
+  return _impl_.value_;
+}
+inline int64_t ExpireAfter::value() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.ExpireAfter.value)
+  return _internal_value();
+}
+inline void ExpireAfter::_internal_set_value(int64_t value) {
+  
+  _impl_.value_ = value;
+}
+inline void ExpireAfter::set_value(int64_t value) {
+  _internal_set_value(value);
+  // @@protoc_insertion_point(field_set:greptime.v1.ExpireAfter.value)
+}
+
+// -------------------------------------------------------------------
+
 // FlightMetadata
 
 // .greptime.v1.AffectedRows affected_rows = 1;
@@ -4573,6 +4749,8 @@ inline void DecimalTypeExtension::set_scale(int32_t value) {
 
 // -------------------------------------------------------------------
 
+// -------------------------------------------------------------------
+
 
 // @@protoc_insertion_point(namespace_scope)
 
diff --git a/c++/greptime/v1/ddl.pb.cc b/c++/greptime/v1/ddl.pb.cc
index 372bff1d..c30c3ae4 100644
--- a/c++/greptime/v1/ddl.pb.cc
+++ b/c++/greptime/v1/ddl.pb.cc
@@ -53,10 +53,10 @@ PROTOBUF_CONSTEXPR CreateFlowExpr::CreateFlowExpr(
   , /*decltype(_impl_.flow_options_)*/{::_pbi::ConstantInitialized()}
   , /*decltype(_impl_.catalog_name_)*/{&::_pbi::fixed_address_empty_string, ::_pbi::ConstantInitialized{}}
   , /*decltype(_impl_.flow_name_)*/{&::_pbi::fixed_address_empty_string, ::_pbi::ConstantInitialized{}}
-  , /*decltype(_impl_.expire_when_)*/{&::_pbi::fixed_address_empty_string, ::_pbi::ConstantInitialized{}}
   , /*decltype(_impl_.comment_)*/{&::_pbi::fixed_address_empty_string, ::_pbi::ConstantInitialized{}}
   , /*decltype(_impl_.sql_)*/{&::_pbi::fixed_address_empty_string, ::_pbi::ConstantInitialized{}}
   , /*decltype(_impl_.sink_table_name_)*/nullptr
+  , /*decltype(_impl_.expire_after_)*/nullptr
   , /*decltype(_impl_.or_replace_)*/false
   , /*decltype(_impl_.create_if_not_exists_)*/false
   , /*decltype(_impl_._cached_size_)*/{}} {}
@@ -444,7 +444,7 @@ const uint32_t TableStruct_greptime_2fv1_2fddl_2eproto::offsets[] PROTOBUF_SECTI
   PROTOBUF_FIELD_OFFSET(::greptime::v1::CreateFlowExpr, _impl_.sink_table_name_),
   PROTOBUF_FIELD_OFFSET(::greptime::v1::CreateFlowExpr, _impl_.or_replace_),
   PROTOBUF_FIELD_OFFSET(::greptime::v1::CreateFlowExpr, _impl_.create_if_not_exists_),
-  PROTOBUF_FIELD_OFFSET(::greptime::v1::CreateFlowExpr, _impl_.expire_when_),
+  PROTOBUF_FIELD_OFFSET(::greptime::v1::CreateFlowExpr, _impl_.expire_after_),
   PROTOBUF_FIELD_OFFSET(::greptime::v1::CreateFlowExpr, _impl_.comment_),
   PROTOBUF_FIELD_OFFSET(::greptime::v1::CreateFlowExpr, _impl_.sql_),
   PROTOBUF_FIELD_OFFSET(::greptime::v1::CreateFlowExpr, _impl_.flow_options_),
@@ -730,92 +730,93 @@ const char descriptor_table_protodef_greptime_2fv1_2fddl_2eproto[] PROTOBUF_SECT
   "_flow\030\t \001(\0132\031.greptime.v1.DropFlowExprH\000"
   "\0222\n\013create_view\030\n \001(\0132\033.greptime.v1.Crea"
   "teViewExprH\000\022.\n\tdrop_view\030\013 \001(\0132\031.grepti"
-  "me.v1.DropViewExprH\000B\006\n\004expr\"\373\002\n\016CreateF"
+  "me.v1.DropViewExprH\000B\006\n\004expr\"\226\003\n\016CreateF"
   "lowExpr\022\024\n\014catalog_name\030\001 \001(\t\022\021\n\tflow_na"
   "me\030\002 \001(\t\0222\n\022source_table_names\030\003 \003(\0132\026.g"
   "reptime.v1.TableName\022/\n\017sink_table_name\030"
   "\004 \001(\0132\026.greptime.v1.TableName\022\022\n\nor_repl"
   "ace\030\005 \001(\010\022\034\n\024create_if_not_exists\030\006 \001(\010\022"
-  "\023\n\013expire_when\030\007 \001(\t\022\017\n\007comment\030\010 \001(\t\022\013\n"
-  "\003sql\030\t \001(\t\022B\n\014flow_options\030\n \003(\0132,.grept"
-  "ime.v1.CreateFlowExpr.FlowOptionsEntry\0322"
-  "\n\020FlowOptionsEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value"
-  "\030\002 \001(\t:\0028\001\"u\n\014DropFlowExpr\022\024\n\014catalog_na"
-  "me\030\001 \001(\t\022\021\n\tflow_name\030\002 \001(\t\022$\n\007flow_id\030\003"
-  " \001(\0132\023.greptime.v1.FlowId\022\026\n\016drop_if_exi"
-  "sts\030\005 \001(\010\"\226\001\n\016CreateViewExpr\022\024\n\014catalog_"
-  "name\030\001 \001(\t\022\023\n\013schema_name\030\002 \001(\t\022\021\n\tview_"
-  "name\030\003 \001(\t\022\024\n\014logical_plan\030\004 \001(\014\022\034\n\024crea"
-  "te_if_not_exists\030\005 \001(\010\022\022\n\nor_replace\030\006 \001"
-  "(\010\"\213\001\n\014DropViewExpr\022\024\n\014catalog_name\030\001 \001("
-  "\t\022\023\n\013schema_name\030\002 \001(\t\022\021\n\tview_name\030\003 \001("
-  "\t\022%\n\007view_id\030\004 \001(\0132\024.greptime.v1.TableId"
-  "\022\026\n\016drop_if_exists\030\005 \001(\010\"\207\003\n\017CreateTable"
-  "Expr\022\024\n\014catalog_name\030\001 \001(\t\022\023\n\013schema_nam"
-  "e\030\002 \001(\t\022\022\n\ntable_name\030\003 \001(\t\022\014\n\004desc\030\004 \001("
-  "\t\022+\n\013column_defs\030\005 \003(\0132\026.greptime.v1.Col"
-  "umnDef\022\022\n\ntime_index\030\006 \001(\t\022\024\n\014primary_ke"
-  "ys\030\007 \003(\t\022\034\n\024create_if_not_exists\030\010 \001(\010\022E"
-  "\n\rtable_options\030\t \003(\0132..greptime.v1.Crea"
-  "teTableExpr.TableOptionsEntry\022&\n\010table_i"
-  "d\030\n \001(\0132\024.greptime.v1.TableId\022\016\n\006engine\030"
-  "\014 \001(\t\0323\n\021TableOptionsEntry\022\013\n\003key\030\001 \001(\t\022"
-  "\r\n\005value\030\002 \001(\t:\0028\001\"\245\002\n\tAlterExpr\022\024\n\014cata"
-  "log_name\030\001 \001(\t\022\023\n\013schema_name\030\002 \001(\t\022\022\n\nt"
-  "able_name\030\003 \001(\t\022.\n\013add_columns\030\004 \001(\0132\027.g"
-  "reptime.v1.AddColumnsH\000\0220\n\014drop_columns\030"
-  "\005 \001(\0132\030.greptime.v1.DropColumnsH\000\0220\n\014ren"
-  "ame_table\030\006 \001(\0132\030.greptime.v1.RenameTabl"
-  "eH\000\022=\n\023change_column_types\030\007 \001(\0132\036.grept"
-  "ime.v1.ChangeColumnTypesH\000B\006\n\004kind\"\216\001\n\rD"
-  "ropTableExpr\022\024\n\014catalog_name\030\001 \001(\t\022\023\n\013sc"
-  "hema_name\030\002 \001(\t\022\022\n\ntable_name\030\003 \001(\t\022&\n\010t"
-  "able_id\030\004 \001(\0132\024.greptime.v1.TableId\022\026\n\016d"
-  "rop_if_exists\030\005 \001(\010\"\314\001\n\022CreateDatabaseEx"
-  "pr\022\024\n\014catalog_name\030\001 \001(\t\022\023\n\013schema_name\030"
-  "\002 \001(\t\022\034\n\024create_if_not_exists\030\003 \001(\010\022=\n\007o"
-  "ptions\030\004 \003(\0132,.greptime.v1.CreateDatabas"
-  "eExpr.OptionsEntry\032.\n\014OptionsEntry\022\013\n\003ke"
-  "y\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"z\n\021TruncateTa"
-  "bleExpr\022\024\n\014catalog_name\030\001 \001(\t\022\023\n\013schema_"
-  "name\030\002 \001(\t\022\022\n\ntable_name\030\003 \001(\t\022&\n\010table_"
-  "id\030\004 \001(\0132\024.greptime.v1.TableId\"U\n\020DropDa"
-  "tabaseExpr\022\024\n\014catalog_name\030\001 \001(\t\022\023\n\013sche"
-  "ma_name\030\002 \001(\t\022\026\n\016drop_if_exists\030\003 \001(\010\"9\n"
-  "\nAddColumns\022+\n\013add_columns\030\001 \003(\0132\026.grept"
-  "ime.v1.AddColumn\"<\n\013DropColumns\022-\n\014drop_"
-  "columns\030\001 \003(\0132\027.greptime.v1.DropColumn\"O"
-  "\n\021ChangeColumnTypes\022:\n\023change_column_typ"
-  "es\030\001 \003(\0132\035.greptime.v1.ChangeColumnType\""
-  "%\n\013RenameTable\022\026\n\016new_table_name\030\001 \001(\t\"i"
-  "\n\tAddColumn\022*\n\ncolumn_def\030\001 \001(\0132\026.grepti"
-  "me.v1.ColumnDef\0220\n\010location\030\003 \001(\0132\036.grep"
-  "time.v1.AddColumnLocation\"\236\001\n\020ChangeColu"
-  "mnType\022\023\n\013column_name\030\001 \001(\t\0220\n\013target_ty"
-  "pe\030\002 \001(\0162\033.greptime.v1.ColumnDataType\022C\n"
-  "\025target_type_extension\030\003 \001(\0132$.greptime."
-  "v1.ColumnDataTypeExtension\"\032\n\nDropColumn"
-  "\022\014\n\004name\030\001 \001(\t\"\025\n\007TableId\022\n\n\002id\030\001 \001(\r\"\024\n"
-  "\006FlowId\022\n\n\002id\030\001 \001(\r\"\377\001\n\tColumnDef\022\014\n\004nam"
-  "e\030\001 \001(\t\022.\n\tdata_type\030\002 \001(\0162\033.greptime.v1"
-  ".ColumnDataType\022\023\n\013is_nullable\030\003 \001(\010\022\032\n\022"
-  "default_constraint\030\004 \001(\014\0220\n\rsemantic_typ"
-  "e\030\005 \001(\0162\031.greptime.v1.SemanticType\022\017\n\007co"
-  "mment\030\006 \001(\t\022@\n\022datatype_extension\030\007 \001(\0132"
-  "$.greptime.v1.ColumnDataTypeExtension\"\230\001"
-  "\n\021AddColumnLocation\022B\n\rlocation_type\030\001 \001"
-  "(\0162+.greptime.v1.AddColumnLocation.Locat"
-  "ionType\022\031\n\021after_column_name\030\002 \001(\t\"$\n\014Lo"
-  "cationType\022\t\n\005FIRST\020\000\022\t\n\005AFTER\020\001BL\n\016io.g"
-  "reptime.v1B\003DdlZ5github.com/GreptimeTeam"
-  "/greptime-proto/go/greptime/v1b\006proto3"
+  ".\n\014expire_after\030\007 \001(\0132\030.greptime.v1.Expi"
+  "reAfter\022\017\n\007comment\030\010 \001(\t\022\013\n\003sql\030\t \001(\t\022B\n"
+  "\014flow_options\030\n \003(\0132,.greptime.v1.Create"
+  "FlowExpr.FlowOptionsEntry\0322\n\020FlowOptions"
+  "Entry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"u\n"
+  "\014DropFlowExpr\022\024\n\014catalog_name\030\001 \001(\t\022\021\n\tf"
+  "low_name\030\002 \001(\t\022$\n\007flow_id\030\003 \001(\0132\023.grepti"
+  "me.v1.FlowId\022\026\n\016drop_if_exists\030\005 \001(\010\"\226\001\n"
+  "\016CreateViewExpr\022\024\n\014catalog_name\030\001 \001(\t\022\023\n"
+  "\013schema_name\030\002 \001(\t\022\021\n\tview_name\030\003 \001(\t\022\024\n"
+  "\014logical_plan\030\004 \001(\014\022\034\n\024create_if_not_exi"
+  "sts\030\005 \001(\010\022\022\n\nor_replace\030\006 \001(\010\"\213\001\n\014DropVi"
+  "ewExpr\022\024\n\014catalog_name\030\001 \001(\t\022\023\n\013schema_n"
+  "ame\030\002 \001(\t\022\021\n\tview_name\030\003 \001(\t\022%\n\007view_id\030"
+  "\004 \001(\0132\024.greptime.v1.TableId\022\026\n\016drop_if_e"
+  "xists\030\005 \001(\010\"\207\003\n\017CreateTableExpr\022\024\n\014catal"
+  "og_name\030\001 \001(\t\022\023\n\013schema_name\030\002 \001(\t\022\022\n\nta"
+  "ble_name\030\003 \001(\t\022\014\n\004desc\030\004 \001(\t\022+\n\013column_d"
+  "efs\030\005 \003(\0132\026.greptime.v1.ColumnDef\022\022\n\ntim"
+  "e_index\030\006 \001(\t\022\024\n\014primary_keys\030\007 \003(\t\022\034\n\024c"
+  "reate_if_not_exists\030\010 \001(\010\022E\n\rtable_optio"
+  "ns\030\t \003(\0132..greptime.v1.CreateTableExpr.T"
+  "ableOptionsEntry\022&\n\010table_id\030\n \001(\0132\024.gre"
+  "ptime.v1.TableId\022\016\n\006engine\030\014 \001(\t\0323\n\021Tabl"
+  "eOptionsEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001("
+  "\t:\0028\001\"\245\002\n\tAlterExpr\022\024\n\014catalog_name\030\001 \001("
+  "\t\022\023\n\013schema_name\030\002 \001(\t\022\022\n\ntable_name\030\003 \001"
+  "(\t\022.\n\013add_columns\030\004 \001(\0132\027.greptime.v1.Ad"
+  "dColumnsH\000\0220\n\014drop_columns\030\005 \001(\0132\030.grept"
+  "ime.v1.DropColumnsH\000\0220\n\014rename_table\030\006 \001"
+  "(\0132\030.greptime.v1.RenameTableH\000\022=\n\023change"
+  "_column_types\030\007 \001(\0132\036.greptime.v1.Change"
+  "ColumnTypesH\000B\006\n\004kind\"\216\001\n\rDropTableExpr\022"
+  "\024\n\014catalog_name\030\001 \001(\t\022\023\n\013schema_name\030\002 \001"
+  "(\t\022\022\n\ntable_name\030\003 \001(\t\022&\n\010table_id\030\004 \001(\013"
+  "2\024.greptime.v1.TableId\022\026\n\016drop_if_exists"
+  "\030\005 \001(\010\"\314\001\n\022CreateDatabaseExpr\022\024\n\014catalog"
+  "_name\030\001 \001(\t\022\023\n\013schema_name\030\002 \001(\t\022\034\n\024crea"
+  "te_if_not_exists\030\003 \001(\010\022=\n\007options\030\004 \003(\0132"
+  ",.greptime.v1.CreateDatabaseExpr.Options"
+  "Entry\032.\n\014OptionsEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005va"
+  "lue\030\002 \001(\t:\0028\001\"z\n\021TruncateTableExpr\022\024\n\014ca"
+  "talog_name\030\001 \001(\t\022\023\n\013schema_name\030\002 \001(\t\022\022\n"
+  "\ntable_name\030\003 \001(\t\022&\n\010table_id\030\004 \001(\0132\024.gr"
+  "eptime.v1.TableId\"U\n\020DropDatabaseExpr\022\024\n"
+  "\014catalog_name\030\001 \001(\t\022\023\n\013schema_name\030\002 \001(\t"
+  "\022\026\n\016drop_if_exists\030\003 \001(\010\"9\n\nAddColumns\022+"
+  "\n\013add_columns\030\001 \003(\0132\026.greptime.v1.AddCol"
+  "umn\"<\n\013DropColumns\022-\n\014drop_columns\030\001 \003(\013"
+  "2\027.greptime.v1.DropColumn\"O\n\021ChangeColum"
+  "nTypes\022:\n\023change_column_types\030\001 \003(\0132\035.gr"
+  "eptime.v1.ChangeColumnType\"%\n\013RenameTabl"
+  "e\022\026\n\016new_table_name\030\001 \001(\t\"i\n\tAddColumn\022*"
+  "\n\ncolumn_def\030\001 \001(\0132\026.greptime.v1.ColumnD"
+  "ef\0220\n\010location\030\003 \001(\0132\036.greptime.v1.AddCo"
+  "lumnLocation\"\236\001\n\020ChangeColumnType\022\023\n\013col"
+  "umn_name\030\001 \001(\t\0220\n\013target_type\030\002 \001(\0162\033.gr"
+  "eptime.v1.ColumnDataType\022C\n\025target_type_"
+  "extension\030\003 \001(\0132$.greptime.v1.ColumnData"
+  "TypeExtension\"\032\n\nDropColumn\022\014\n\004name\030\001 \001("
+  "\t\"\025\n\007TableId\022\n\n\002id\030\001 \001(\r\"\024\n\006FlowId\022\n\n\002id"
+  "\030\001 \001(\r\"\377\001\n\tColumnDef\022\014\n\004name\030\001 \001(\t\022.\n\tda"
+  "ta_type\030\002 \001(\0162\033.greptime.v1.ColumnDataTy"
+  "pe\022\023\n\013is_nullable\030\003 \001(\010\022\032\n\022default_const"
+  "raint\030\004 \001(\014\0220\n\rsemantic_type\030\005 \001(\0162\031.gre"
+  "ptime.v1.SemanticType\022\017\n\007comment\030\006 \001(\t\022@"
+  "\n\022datatype_extension\030\007 \001(\0132$.greptime.v1"
+  ".ColumnDataTypeExtension\"\230\001\n\021AddColumnLo"
+  "cation\022B\n\rlocation_type\030\001 \001(\0162+.greptime"
+  ".v1.AddColumnLocation.LocationType\022\031\n\021af"
+  "ter_column_name\030\002 \001(\t\"$\n\014LocationType\022\t\n"
+  "\005FIRST\020\000\022\t\n\005AFTER\020\001BL\n\016io.greptime.v1B\003D"
+  "dlZ5github.com/GreptimeTeam/greptime-pro"
+  "to/go/greptime/v1b\006proto3"
   ;
 static const ::_pbi::DescriptorTable* const descriptor_table_greptime_2fv1_2fddl_2eproto_deps[1] = {
   &::descriptor_table_greptime_2fv1_2fcommon_2eproto,
 };
 static ::_pbi::once_flag descriptor_table_greptime_2fv1_2fddl_2eproto_once;
 const ::_pbi::DescriptorTable descriptor_table_greptime_2fv1_2fddl_2eproto = {
-    false, false, 3678, descriptor_table_protodef_greptime_2fv1_2fddl_2eproto,
+    false, false, 3705, descriptor_table_protodef_greptime_2fv1_2fddl_2eproto,
     "greptime/v1/ddl.proto",
     &descriptor_table_greptime_2fv1_2fddl_2eproto_once, descriptor_table_greptime_2fv1_2fddl_2eproto_deps, 1, 25,
     schemas, file_default_instances, TableStruct_greptime_2fv1_2fddl_2eproto::offsets,
@@ -1582,12 +1583,17 @@ ::PROTOBUF_NAMESPACE_ID::Metadata CreateFlowExpr_FlowOptionsEntry_DoNotUse::GetM
 class CreateFlowExpr::_Internal {
  public:
   static const ::greptime::v1::TableName& sink_table_name(const CreateFlowExpr* msg);
+  static const ::greptime::v1::ExpireAfter& expire_after(const CreateFlowExpr* msg);
 };
 
 const ::greptime::v1::TableName&
 CreateFlowExpr::_Internal::sink_table_name(const CreateFlowExpr* msg) {
   return *msg->_impl_.sink_table_name_;
 }
+const ::greptime::v1::ExpireAfter&
+CreateFlowExpr::_Internal::expire_after(const CreateFlowExpr* msg) {
+  return *msg->_impl_.expire_after_;
+}
 void CreateFlowExpr::clear_source_table_names() {
   _impl_.source_table_names_.Clear();
 }
@@ -1597,6 +1603,12 @@ void CreateFlowExpr::clear_sink_table_name() {
   }
   _impl_.sink_table_name_ = nullptr;
 }
+void CreateFlowExpr::clear_expire_after() {
+  if (GetArenaForAllocation() == nullptr && _impl_.expire_after_ != nullptr) {
+    delete _impl_.expire_after_;
+  }
+  _impl_.expire_after_ = nullptr;
+}
 CreateFlowExpr::CreateFlowExpr(::PROTOBUF_NAMESPACE_ID::Arena* arena,
                          bool is_message_owned)
   : ::PROTOBUF_NAMESPACE_ID::Message(arena, is_message_owned) {
@@ -1614,10 +1626,10 @@ CreateFlowExpr::CreateFlowExpr(const CreateFlowExpr& from)
     , /*decltype(_impl_.flow_options_)*/{}
     , decltype(_impl_.catalog_name_){}
     , decltype(_impl_.flow_name_){}
-    , decltype(_impl_.expire_when_){}
     , decltype(_impl_.comment_){}
     , decltype(_impl_.sql_){}
     , decltype(_impl_.sink_table_name_){nullptr}
+    , decltype(_impl_.expire_after_){nullptr}
     , decltype(_impl_.or_replace_){}
     , decltype(_impl_.create_if_not_exists_){}
     , /*decltype(_impl_._cached_size_)*/{}};
@@ -1640,14 +1652,6 @@ CreateFlowExpr::CreateFlowExpr(const CreateFlowExpr& from)
     _this->_impl_.flow_name_.Set(from._internal_flow_name(), 
       _this->GetArenaForAllocation());
   }
-  _impl_.expire_when_.InitDefault();
-  #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
-    _impl_.expire_when_.Set("", GetArenaForAllocation());
-  #endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
-  if (!from._internal_expire_when().empty()) {
-    _this->_impl_.expire_when_.Set(from._internal_expire_when(), 
-      _this->GetArenaForAllocation());
-  }
   _impl_.comment_.InitDefault();
   #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
     _impl_.comment_.Set("", GetArenaForAllocation());
@@ -1667,6 +1671,9 @@ CreateFlowExpr::CreateFlowExpr(const CreateFlowExpr& from)
   if (from._internal_has_sink_table_name()) {
     _this->_impl_.sink_table_name_ = new ::greptime::v1::TableName(*from._impl_.sink_table_name_);
   }
+  if (from._internal_has_expire_after()) {
+    _this->_impl_.expire_after_ = new ::greptime::v1::ExpireAfter(*from._impl_.expire_after_);
+  }
   ::memcpy(&_impl_.or_replace_, &from._impl_.or_replace_,
     static_cast<size_t>(reinterpret_cast<char*>(&_impl_.create_if_not_exists_) -
     reinterpret_cast<char*>(&_impl_.or_replace_)) + sizeof(_impl_.create_if_not_exists_));
@@ -1682,10 +1689,10 @@ inline void CreateFlowExpr::SharedCtor(
     , /*decltype(_impl_.flow_options_)*/{::_pbi::ArenaInitialized(), arena}
     , decltype(_impl_.catalog_name_){}
     , decltype(_impl_.flow_name_){}
-    , decltype(_impl_.expire_when_){}
     , decltype(_impl_.comment_){}
     , decltype(_impl_.sql_){}
     , decltype(_impl_.sink_table_name_){nullptr}
+    , decltype(_impl_.expire_after_){nullptr}
     , decltype(_impl_.or_replace_){false}
     , decltype(_impl_.create_if_not_exists_){false}
     , /*decltype(_impl_._cached_size_)*/{}
@@ -1698,10 +1705,6 @@ inline void CreateFlowExpr::SharedCtor(
   #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
     _impl_.flow_name_.Set("", GetArenaForAllocation());
   #endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
-  _impl_.expire_when_.InitDefault();
-  #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
-    _impl_.expire_when_.Set("", GetArenaForAllocation());
-  #endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
   _impl_.comment_.InitDefault();
   #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
     _impl_.comment_.Set("", GetArenaForAllocation());
@@ -1729,10 +1732,10 @@ inline void CreateFlowExpr::SharedDtor() {
   _impl_.flow_options_.~MapField();
   _impl_.catalog_name_.Destroy();
   _impl_.flow_name_.Destroy();
-  _impl_.expire_when_.Destroy();
   _impl_.comment_.Destroy();
   _impl_.sql_.Destroy();
   if (this != internal_default_instance()) delete _impl_.sink_table_name_;
+  if (this != internal_default_instance()) delete _impl_.expire_after_;
 }
 
 void CreateFlowExpr::ArenaDtor(void* object) {
@@ -1753,13 +1756,16 @@ void CreateFlowExpr::Clear() {
   _impl_.flow_options_.Clear();
   _impl_.catalog_name_.ClearToEmpty();
   _impl_.flow_name_.ClearToEmpty();
-  _impl_.expire_when_.ClearToEmpty();
   _impl_.comment_.ClearToEmpty();
   _impl_.sql_.ClearToEmpty();
   if (GetArenaForAllocation() == nullptr && _impl_.sink_table_name_ != nullptr) {
     delete _impl_.sink_table_name_;
   }
   _impl_.sink_table_name_ = nullptr;
+  if (GetArenaForAllocation() == nullptr && _impl_.expire_after_ != nullptr) {
+    delete _impl_.expire_after_;
+  }
+  _impl_.expire_after_ = nullptr;
   ::memset(&_impl_.or_replace_, 0, static_cast<size_t>(
       reinterpret_cast<char*>(&_impl_.create_if_not_exists_) -
       reinterpret_cast<char*>(&_impl_.or_replace_)) + sizeof(_impl_.create_if_not_exists_));
@@ -1829,13 +1835,11 @@ const char* CreateFlowExpr::_InternalParse(const char* ptr, ::_pbi::ParseContext
         } else
           goto handle_unusual;
         continue;
-      // string expire_when = 7;
+      // .greptime.v1.ExpireAfter expire_after = 7;
       case 7:
         if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 58)) {
-          auto str = _internal_mutable_expire_when();
-          ptr = ::_pbi::InlineGreedyStringParser(str, ptr, ctx);
+          ptr = ctx->ParseMessage(_internal_mutable_expire_after(), ptr);
           CHK_(ptr);
-          CHK_(::_pbi::VerifyUTF8(str, "greptime.v1.CreateFlowExpr.expire_when"));
         } else
           goto handle_unusual;
         continue;
@@ -1948,14 +1952,11 @@ uint8_t* CreateFlowExpr::_InternalSerialize(
     target = ::_pbi::WireFormatLite::WriteBoolToArray(6, this->_internal_create_if_not_exists(), target);
   }
 
-  // string expire_when = 7;
-  if (!this->_internal_expire_when().empty()) {
-    ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::VerifyUtf8String(
-      this->_internal_expire_when().data(), static_cast<int>(this->_internal_expire_when().length()),
-      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::SERIALIZE,
-      "greptime.v1.CreateFlowExpr.expire_when");
-    target = stream->WriteStringMaybeAliased(
-        7, this->_internal_expire_when(), target);
+  // .greptime.v1.ExpireAfter expire_after = 7;
+  if (this->_internal_has_expire_after()) {
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::
+      InternalWriteMessage(7, _Internal::expire_after(this),
+        _Internal::expire_after(this).GetCachedSize(), target, stream);
   }
 
   // string comment = 8;
@@ -2054,13 +2055,6 @@ size_t CreateFlowExpr::ByteSizeLong() const {
         this->_internal_flow_name());
   }
 
-  // string expire_when = 7;
-  if (!this->_internal_expire_when().empty()) {
-    total_size += 1 +
-      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::StringSize(
-        this->_internal_expire_when());
-  }
-
   // string comment = 8;
   if (!this->_internal_comment().empty()) {
     total_size += 1 +
@@ -2082,6 +2076,13 @@ size_t CreateFlowExpr::ByteSizeLong() const {
         *_impl_.sink_table_name_);
   }
 
+  // .greptime.v1.ExpireAfter expire_after = 7;
+  if (this->_internal_has_expire_after()) {
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::MessageSize(
+        *_impl_.expire_after_);
+  }
+
   // bool or_replace = 5;
   if (this->_internal_or_replace() != 0) {
     total_size += 1 + 1;
@@ -2118,9 +2119,6 @@ void CreateFlowExpr::MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const :
   if (!from._internal_flow_name().empty()) {
     _this->_internal_set_flow_name(from._internal_flow_name());
   }
-  if (!from._internal_expire_when().empty()) {
-    _this->_internal_set_expire_when(from._internal_expire_when());
-  }
   if (!from._internal_comment().empty()) {
     _this->_internal_set_comment(from._internal_comment());
   }
@@ -2131,6 +2129,10 @@ void CreateFlowExpr::MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const :
     _this->_internal_mutable_sink_table_name()->::greptime::v1::TableName::MergeFrom(
         from._internal_sink_table_name());
   }
+  if (from._internal_has_expire_after()) {
+    _this->_internal_mutable_expire_after()->::greptime::v1::ExpireAfter::MergeFrom(
+        from._internal_expire_after());
+  }
   if (from._internal_or_replace() != 0) {
     _this->_internal_set_or_replace(from._internal_or_replace());
   }
@@ -2166,10 +2168,6 @@ void CreateFlowExpr::InternalSwap(CreateFlowExpr* other) {
       &_impl_.flow_name_, lhs_arena,
       &other->_impl_.flow_name_, rhs_arena
   );
-  ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::InternalSwap(
-      &_impl_.expire_when_, lhs_arena,
-      &other->_impl_.expire_when_, rhs_arena
-  );
   ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::InternalSwap(
       &_impl_.comment_, lhs_arena,
       &other->_impl_.comment_, rhs_arena
diff --git a/c++/greptime/v1/ddl.pb.h b/c++/greptime/v1/ddl.pb.h
index 956f3dc3..4cd2ae2d 100644
--- a/c++/greptime/v1/ddl.pb.h
+++ b/c++/greptime/v1/ddl.pb.h
@@ -691,10 +691,10 @@ class CreateFlowExpr final :
     kFlowOptionsFieldNumber = 10,
     kCatalogNameFieldNumber = 1,
     kFlowNameFieldNumber = 2,
-    kExpireWhenFieldNumber = 7,
     kCommentFieldNumber = 8,
     kSqlFieldNumber = 9,
     kSinkTableNameFieldNumber = 4,
+    kExpireAfterFieldNumber = 7,
     kOrReplaceFieldNumber = 5,
     kCreateIfNotExistsFieldNumber = 6,
   };
@@ -761,20 +761,6 @@ class CreateFlowExpr final :
   std::string* _internal_mutable_flow_name();
   public:
 
-  // string expire_when = 7;
-  void clear_expire_when();
-  const std::string& expire_when() const;
-  template <typename ArgT0 = const std::string&, typename... ArgT>
-  void set_expire_when(ArgT0&& arg0, ArgT... args);
-  std::string* mutable_expire_when();
-  PROTOBUF_NODISCARD std::string* release_expire_when();
-  void set_allocated_expire_when(std::string* expire_when);
-  private:
-  const std::string& _internal_expire_when() const;
-  inline PROTOBUF_ALWAYS_INLINE void _internal_set_expire_when(const std::string& value);
-  std::string* _internal_mutable_expire_when();
-  public:
-
   // string comment = 8;
   void clear_comment();
   const std::string& comment() const;
@@ -821,6 +807,24 @@ class CreateFlowExpr final :
       ::greptime::v1::TableName* sink_table_name);
   ::greptime::v1::TableName* unsafe_arena_release_sink_table_name();
 
+  // .greptime.v1.ExpireAfter expire_after = 7;
+  bool has_expire_after() const;
+  private:
+  bool _internal_has_expire_after() const;
+  public:
+  void clear_expire_after();
+  const ::greptime::v1::ExpireAfter& expire_after() const;
+  PROTOBUF_NODISCARD ::greptime::v1::ExpireAfter* release_expire_after();
+  ::greptime::v1::ExpireAfter* mutable_expire_after();
+  void set_allocated_expire_after(::greptime::v1::ExpireAfter* expire_after);
+  private:
+  const ::greptime::v1::ExpireAfter& _internal_expire_after() const;
+  ::greptime::v1::ExpireAfter* _internal_mutable_expire_after();
+  public:
+  void unsafe_arena_set_allocated_expire_after(
+      ::greptime::v1::ExpireAfter* expire_after);
+  ::greptime::v1::ExpireAfter* unsafe_arena_release_expire_after();
+
   // bool or_replace = 5;
   void clear_or_replace();
   bool or_replace() const;
@@ -855,10 +859,10 @@ class CreateFlowExpr final :
         ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::TYPE_STRING> flow_options_;
     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr catalog_name_;
     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr flow_name_;
-    ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr expire_when_;
     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr comment_;
     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr sql_;
     ::greptime::v1::TableName* sink_table_name_;
+    ::greptime::v1::ExpireAfter* expire_after_;
     bool or_replace_;
     bool create_if_not_exists_;
     mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
@@ -5812,54 +5816,89 @@ inline void CreateFlowExpr::set_create_if_not_exists(bool value) {
   // @@protoc_insertion_point(field_set:greptime.v1.CreateFlowExpr.create_if_not_exists)
 }
 
-// string expire_when = 7;
-inline void CreateFlowExpr::clear_expire_when() {
-  _impl_.expire_when_.ClearToEmpty();
+// .greptime.v1.ExpireAfter expire_after = 7;
+inline bool CreateFlowExpr::_internal_has_expire_after() const {
+  return this != internal_default_instance() && _impl_.expire_after_ != nullptr;
 }
-inline const std::string& CreateFlowExpr::expire_when() const {
-  // @@protoc_insertion_point(field_get:greptime.v1.CreateFlowExpr.expire_when)
-  return _internal_expire_when();
+inline bool CreateFlowExpr::has_expire_after() const {
+  return _internal_has_expire_after();
 }
-template <typename ArgT0, typename... ArgT>
-inline PROTOBUF_ALWAYS_INLINE
-void CreateFlowExpr::set_expire_when(ArgT0&& arg0, ArgT... args) {
- 
- _impl_.expire_when_.Set(static_cast<ArgT0 &&>(arg0), args..., GetArenaForAllocation());
-  // @@protoc_insertion_point(field_set:greptime.v1.CreateFlowExpr.expire_when)
+inline const ::greptime::v1::ExpireAfter& CreateFlowExpr::_internal_expire_after() const {
+  const ::greptime::v1::ExpireAfter* p = _impl_.expire_after_;
+  return p != nullptr ? *p : reinterpret_cast<const ::greptime::v1::ExpireAfter&>(
+      ::greptime::v1::_ExpireAfter_default_instance_);
 }
-inline std::string* CreateFlowExpr::mutable_expire_when() {
-  std::string* _s = _internal_mutable_expire_when();
-  // @@protoc_insertion_point(field_mutable:greptime.v1.CreateFlowExpr.expire_when)
-  return _s;
+inline const ::greptime::v1::ExpireAfter& CreateFlowExpr::expire_after() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.CreateFlowExpr.expire_after)
+  return _internal_expire_after();
 }
-inline const std::string& CreateFlowExpr::_internal_expire_when() const {
-  return _impl_.expire_when_.Get();
+inline void CreateFlowExpr::unsafe_arena_set_allocated_expire_after(
+    ::greptime::v1::ExpireAfter* expire_after) {
+  if (GetArenaForAllocation() == nullptr) {
+    delete reinterpret_cast<::PROTOBUF_NAMESPACE_ID::MessageLite*>(_impl_.expire_after_);
+  }
+  _impl_.expire_after_ = expire_after;
+  if (expire_after) {
+    
+  } else {
+    
+  }
+  // @@protoc_insertion_point(field_unsafe_arena_set_allocated:greptime.v1.CreateFlowExpr.expire_after)
+}
+inline ::greptime::v1::ExpireAfter* CreateFlowExpr::release_expire_after() {
+  
+  ::greptime::v1::ExpireAfter* temp = _impl_.expire_after_;
+  _impl_.expire_after_ = nullptr;
+#ifdef PROTOBUF_FORCE_COPY_IN_RELEASE
+  auto* old =  reinterpret_cast<::PROTOBUF_NAMESPACE_ID::MessageLite*>(temp);
+  temp = ::PROTOBUF_NAMESPACE_ID::internal::DuplicateIfNonNull(temp);
+  if (GetArenaForAllocation() == nullptr) { delete old; }
+#else  // PROTOBUF_FORCE_COPY_IN_RELEASE
+  if (GetArenaForAllocation() != nullptr) {
+    temp = ::PROTOBUF_NAMESPACE_ID::internal::DuplicateIfNonNull(temp);
+  }
+#endif  // !PROTOBUF_FORCE_COPY_IN_RELEASE
+  return temp;
 }
-inline void CreateFlowExpr::_internal_set_expire_when(const std::string& value) {
+inline ::greptime::v1::ExpireAfter* CreateFlowExpr::unsafe_arena_release_expire_after() {
+  // @@protoc_insertion_point(field_release:greptime.v1.CreateFlowExpr.expire_after)
   
-  _impl_.expire_when_.Set(value, GetArenaForAllocation());
+  ::greptime::v1::ExpireAfter* temp = _impl_.expire_after_;
+  _impl_.expire_after_ = nullptr;
+  return temp;
 }
-inline std::string* CreateFlowExpr::_internal_mutable_expire_when() {
+inline ::greptime::v1::ExpireAfter* CreateFlowExpr::_internal_mutable_expire_after() {
   
-  return _impl_.expire_when_.Mutable(GetArenaForAllocation());
+  if (_impl_.expire_after_ == nullptr) {
+    auto* p = CreateMaybeMessage<::greptime::v1::ExpireAfter>(GetArenaForAllocation());
+    _impl_.expire_after_ = p;
+  }
+  return _impl_.expire_after_;
 }
-inline std::string* CreateFlowExpr::release_expire_when() {
-  // @@protoc_insertion_point(field_release:greptime.v1.CreateFlowExpr.expire_when)
-  return _impl_.expire_when_.Release();
+inline ::greptime::v1::ExpireAfter* CreateFlowExpr::mutable_expire_after() {
+  ::greptime::v1::ExpireAfter* _msg = _internal_mutable_expire_after();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.CreateFlowExpr.expire_after)
+  return _msg;
 }
-inline void CreateFlowExpr::set_allocated_expire_when(std::string* expire_when) {
-  if (expire_when != nullptr) {
+inline void CreateFlowExpr::set_allocated_expire_after(::greptime::v1::ExpireAfter* expire_after) {
+  ::PROTOBUF_NAMESPACE_ID::Arena* message_arena = GetArenaForAllocation();
+  if (message_arena == nullptr) {
+    delete reinterpret_cast< ::PROTOBUF_NAMESPACE_ID::MessageLite*>(_impl_.expire_after_);
+  }
+  if (expire_after) {
+    ::PROTOBUF_NAMESPACE_ID::Arena* submessage_arena =
+        ::PROTOBUF_NAMESPACE_ID::Arena::InternalGetOwningArena(
+                reinterpret_cast<::PROTOBUF_NAMESPACE_ID::MessageLite*>(expire_after));
+    if (message_arena != submessage_arena) {
+      expire_after = ::PROTOBUF_NAMESPACE_ID::internal::GetOwnedMessage(
+          message_arena, expire_after, submessage_arena);
+    }
     
   } else {
     
   }
-  _impl_.expire_when_.SetAllocated(expire_when, GetArenaForAllocation());
-#ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
-  if (_impl_.expire_when_.IsDefault()) {
-    _impl_.expire_when_.Set("", GetArenaForAllocation());
-  }
-#endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
-  // @@protoc_insertion_point(field_set_allocated:greptime.v1.CreateFlowExpr.expire_when)
+  _impl_.expire_after_ = expire_after;
+  // @@protoc_insertion_point(field_set_allocated:greptime.v1.CreateFlowExpr.expire_after)
 }
 
 // string comment = 8;
diff --git a/c++/greptime/v1/flow/server.pb.cc b/c++/greptime/v1/flow/server.pb.cc
index e42c05c8..f7f1df5f 100644
--- a/c++/greptime/v1/flow/server.pb.cc
+++ b/c++/greptime/v1/flow/server.pb.cc
@@ -132,11 +132,11 @@ PROTOBUF_CONSTEXPR CreateRequest::CreateRequest(
     ::_pbi::ConstantInitialized): _impl_{
     /*decltype(_impl_.source_table_ids_)*/{}
   , /*decltype(_impl_.flow_options_)*/{::_pbi::ConstantInitialized()}
-  , /*decltype(_impl_.expire_when_)*/{&::_pbi::fixed_address_empty_string, ::_pbi::ConstantInitialized{}}
   , /*decltype(_impl_.comment_)*/{&::_pbi::fixed_address_empty_string, ::_pbi::ConstantInitialized{}}
   , /*decltype(_impl_.sql_)*/{&::_pbi::fixed_address_empty_string, ::_pbi::ConstantInitialized{}}
   , /*decltype(_impl_.flow_id_)*/nullptr
   , /*decltype(_impl_.sink_table_name_)*/nullptr
+  , /*decltype(_impl_.expire_after_)*/nullptr
   , /*decltype(_impl_.create_if_not_exists_)*/false
   , /*decltype(_impl_._cached_size_)*/{}} {}
 struct CreateRequestDefaultTypeInternal {
@@ -252,7 +252,7 @@ const uint32_t TableStruct_greptime_2fv1_2fflow_2fserver_2eproto::offsets[] PROT
   PROTOBUF_FIELD_OFFSET(::greptime::v1::flow::CreateRequest, _impl_.source_table_ids_),
   PROTOBUF_FIELD_OFFSET(::greptime::v1::flow::CreateRequest, _impl_.sink_table_name_),
   PROTOBUF_FIELD_OFFSET(::greptime::v1::flow::CreateRequest, _impl_.create_if_not_exists_),
-  PROTOBUF_FIELD_OFFSET(::greptime::v1::flow::CreateRequest, _impl_.expire_when_),
+  PROTOBUF_FIELD_OFFSET(::greptime::v1::flow::CreateRequest, _impl_.expire_after_),
   PROTOBUF_FIELD_OFFSET(::greptime::v1::flow::CreateRequest, _impl_.comment_),
   PROTOBUF_FIELD_OFFSET(::greptime::v1::flow::CreateRequest, _impl_.sql_),
   PROTOBUF_FIELD_OFFSET(::greptime::v1::flow::CreateRequest, _impl_.flow_options_),
@@ -313,24 +313,25 @@ const char descriptor_table_protodef_greptime_2fv1_2fflow_2fserver_2eproto[] PRO
   "ime.v1.FlowId\022@\n\textension\030\004 \003(\0132-.grept"
   "ime.v1.flow.FlowResponse.ExtensionEntry\032"
   "0\n\016ExtensionEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030"
-  "\002 \001(\014:\0028\001\"\343\002\n\rCreateRequest\022$\n\007flow_id\030\001"
+  "\002 \001(\014:\0028\001\"\376\002\n\rCreateRequest\022$\n\007flow_id\030\001"
   " \001(\0132\023.greptime.v1.FlowId\022.\n\020source_tabl"
   "e_ids\030\002 \003(\0132\024.greptime.v1.TableId\022/\n\017sin"
   "k_table_name\030\003 \001(\0132\026.greptime.v1.TableNa"
-  "me\022\034\n\024create_if_not_exists\030\004 \001(\010\022\023\n\013expi"
-  "re_when\030\005 \001(\t\022\017\n\007comment\030\006 \001(\t\022\013\n\003sql\030\007 "
-  "\001(\t\022F\n\014flow_options\030\010 \003(\01320.greptime.v1."
-  "flow.CreateRequest.FlowOptionsEntry\0322\n\020F"
-  "lowOptionsEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 "
-  "\001(\t:\0028\001\"3\n\013DropRequest\022$\n\007flow_id\030\001 \001(\0132"
-  "\023.greptime.v1.FlowId2\264\001\n\004Flow\022S\n\022HandleC"
-  "reateRemove\022\035.greptime.v1.flow.FlowReque"
-  "st\032\036.greptime.v1.flow.FlowResponse\022W\n\023Ha"
-  "ndleMirrorRequest\022 .greptime.v1.flow.Ins"
-  "ertRequests\032\036.greptime.v1.flow.FlowRespo"
-  "nseBY\n\023io.greptime.v1.flowB\006ServerZ:gith"
-  "ub.com/GreptimeTeam/greptime-proto/go/gr"
-  "eptime/v1/flowb\006proto3"
+  "me\022\034\n\024create_if_not_exists\030\004 \001(\010\022.\n\014expi"
+  "re_after\030\005 \001(\0132\030.greptime.v1.ExpireAfter"
+  "\022\017\n\007comment\030\006 \001(\t\022\013\n\003sql\030\007 \001(\t\022F\n\014flow_o"
+  "ptions\030\010 \003(\01320.greptime.v1.flow.CreateRe"
+  "quest.FlowOptionsEntry\0322\n\020FlowOptionsEnt"
+  "ry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"3\n\013Dr"
+  "opRequest\022$\n\007flow_id\030\001 \001(\0132\023.greptime.v1"
+  ".FlowId2\264\001\n\004Flow\022S\n\022HandleCreateRemove\022\035"
+  ".greptime.v1.flow.FlowRequest\032\036.greptime"
+  ".v1.flow.FlowResponse\022W\n\023HandleMirrorReq"
+  "uest\022 .greptime.v1.flow.InsertRequests\032\036"
+  ".greptime.v1.flow.FlowResponseBY\n\023io.gre"
+  "ptime.v1.flowB\006ServerZ:github.com/Grepti"
+  "meTeam/greptime-proto/go/greptime/v1/flo"
+  "wb\006proto3"
   ;
 static const ::_pbi::DescriptorTable* const descriptor_table_greptime_2fv1_2fflow_2fserver_2eproto_deps[3] = {
   &::descriptor_table_greptime_2fv1_2fcommon_2eproto,
@@ -339,7 +340,7 @@ static const ::_pbi::DescriptorTable* const descriptor_table_greptime_2fv1_2fflo
 };
 static ::_pbi::once_flag descriptor_table_greptime_2fv1_2fflow_2fserver_2eproto_once;
 const ::_pbi::DescriptorTable descriptor_table_greptime_2fv1_2fflow_2fserver_2eproto = {
-    false, false, 1582, descriptor_table_protodef_greptime_2fv1_2fflow_2fserver_2eproto,
+    false, false, 1609, descriptor_table_protodef_greptime_2fv1_2fflow_2fserver_2eproto,
     "greptime/v1/flow/server.proto",
     &descriptor_table_greptime_2fv1_2fflow_2fserver_2eproto_once, descriptor_table_greptime_2fv1_2fflow_2fserver_2eproto_deps, 3, 10,
     schemas, file_default_instances, TableStruct_greptime_2fv1_2fflow_2fserver_2eproto::offsets,
@@ -1764,6 +1765,7 @@ class CreateRequest::_Internal {
  public:
   static const ::greptime::v1::FlowId& flow_id(const CreateRequest* msg);
   static const ::greptime::v1::TableName& sink_table_name(const CreateRequest* msg);
+  static const ::greptime::v1::ExpireAfter& expire_after(const CreateRequest* msg);
 };
 
 const ::greptime::v1::FlowId&
@@ -1774,6 +1776,10 @@ const ::greptime::v1::TableName&
 CreateRequest::_Internal::sink_table_name(const CreateRequest* msg) {
   return *msg->_impl_.sink_table_name_;
 }
+const ::greptime::v1::ExpireAfter&
+CreateRequest::_Internal::expire_after(const CreateRequest* msg) {
+  return *msg->_impl_.expire_after_;
+}
 void CreateRequest::clear_flow_id() {
   if (GetArenaForAllocation() == nullptr && _impl_.flow_id_ != nullptr) {
     delete _impl_.flow_id_;
@@ -1789,6 +1795,12 @@ void CreateRequest::clear_sink_table_name() {
   }
   _impl_.sink_table_name_ = nullptr;
 }
+void CreateRequest::clear_expire_after() {
+  if (GetArenaForAllocation() == nullptr && _impl_.expire_after_ != nullptr) {
+    delete _impl_.expire_after_;
+  }
+  _impl_.expire_after_ = nullptr;
+}
 CreateRequest::CreateRequest(::PROTOBUF_NAMESPACE_ID::Arena* arena,
                          bool is_message_owned)
   : ::PROTOBUF_NAMESPACE_ID::Message(arena, is_message_owned) {
@@ -1804,24 +1816,16 @@ CreateRequest::CreateRequest(const CreateRequest& from)
   new (&_impl_) Impl_{
       decltype(_impl_.source_table_ids_){from._impl_.source_table_ids_}
     , /*decltype(_impl_.flow_options_)*/{}
-    , decltype(_impl_.expire_when_){}
     , decltype(_impl_.comment_){}
     , decltype(_impl_.sql_){}
     , decltype(_impl_.flow_id_){nullptr}
     , decltype(_impl_.sink_table_name_){nullptr}
+    , decltype(_impl_.expire_after_){nullptr}
     , decltype(_impl_.create_if_not_exists_){}
     , /*decltype(_impl_._cached_size_)*/{}};
 
   _internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
   _this->_impl_.flow_options_.MergeFrom(from._impl_.flow_options_);
-  _impl_.expire_when_.InitDefault();
-  #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
-    _impl_.expire_when_.Set("", GetArenaForAllocation());
-  #endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
-  if (!from._internal_expire_when().empty()) {
-    _this->_impl_.expire_when_.Set(from._internal_expire_when(), 
-      _this->GetArenaForAllocation());
-  }
   _impl_.comment_.InitDefault();
   #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
     _impl_.comment_.Set("", GetArenaForAllocation());
@@ -1844,6 +1848,9 @@ CreateRequest::CreateRequest(const CreateRequest& from)
   if (from._internal_has_sink_table_name()) {
     _this->_impl_.sink_table_name_ = new ::greptime::v1::TableName(*from._impl_.sink_table_name_);
   }
+  if (from._internal_has_expire_after()) {
+    _this->_impl_.expire_after_ = new ::greptime::v1::ExpireAfter(*from._impl_.expire_after_);
+  }
   _this->_impl_.create_if_not_exists_ = from._impl_.create_if_not_exists_;
   // @@protoc_insertion_point(copy_constructor:greptime.v1.flow.CreateRequest)
 }
@@ -1855,18 +1862,14 @@ inline void CreateRequest::SharedCtor(
   new (&_impl_) Impl_{
       decltype(_impl_.source_table_ids_){arena}
     , /*decltype(_impl_.flow_options_)*/{::_pbi::ArenaInitialized(), arena}
-    , decltype(_impl_.expire_when_){}
     , decltype(_impl_.comment_){}
     , decltype(_impl_.sql_){}
     , decltype(_impl_.flow_id_){nullptr}
     , decltype(_impl_.sink_table_name_){nullptr}
+    , decltype(_impl_.expire_after_){nullptr}
     , decltype(_impl_.create_if_not_exists_){false}
     , /*decltype(_impl_._cached_size_)*/{}
   };
-  _impl_.expire_when_.InitDefault();
-  #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
-    _impl_.expire_when_.Set("", GetArenaForAllocation());
-  #endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
   _impl_.comment_.InitDefault();
   #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
     _impl_.comment_.Set("", GetArenaForAllocation());
@@ -1892,11 +1895,11 @@ inline void CreateRequest::SharedDtor() {
   _impl_.source_table_ids_.~RepeatedPtrField();
   _impl_.flow_options_.Destruct();
   _impl_.flow_options_.~MapField();
-  _impl_.expire_when_.Destroy();
   _impl_.comment_.Destroy();
   _impl_.sql_.Destroy();
   if (this != internal_default_instance()) delete _impl_.flow_id_;
   if (this != internal_default_instance()) delete _impl_.sink_table_name_;
+  if (this != internal_default_instance()) delete _impl_.expire_after_;
 }
 
 void CreateRequest::ArenaDtor(void* object) {
@@ -1915,7 +1918,6 @@ void CreateRequest::Clear() {
 
   _impl_.source_table_ids_.Clear();
   _impl_.flow_options_.Clear();
-  _impl_.expire_when_.ClearToEmpty();
   _impl_.comment_.ClearToEmpty();
   _impl_.sql_.ClearToEmpty();
   if (GetArenaForAllocation() == nullptr && _impl_.flow_id_ != nullptr) {
@@ -1926,6 +1928,10 @@ void CreateRequest::Clear() {
     delete _impl_.sink_table_name_;
   }
   _impl_.sink_table_name_ = nullptr;
+  if (GetArenaForAllocation() == nullptr && _impl_.expire_after_ != nullptr) {
+    delete _impl_.expire_after_;
+  }
+  _impl_.expire_after_ = nullptr;
   _impl_.create_if_not_exists_ = false;
   _internal_metadata_.Clear<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>();
 }
@@ -1973,13 +1979,11 @@ const char* CreateRequest::_InternalParse(const char* ptr, ::_pbi::ParseContext*
         } else
           goto handle_unusual;
         continue;
-      // string expire_when = 5;
+      // .greptime.v1.ExpireAfter expire_after = 5;
       case 5:
         if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 42)) {
-          auto str = _internal_mutable_expire_when();
-          ptr = ::_pbi::InlineGreedyStringParser(str, ptr, ctx);
+          ptr = ctx->ParseMessage(_internal_mutable_expire_after(), ptr);
           CHK_(ptr);
-          CHK_(::_pbi::VerifyUTF8(str, "greptime.v1.flow.CreateRequest.expire_when"));
         } else
           goto handle_unusual;
         continue;
@@ -2073,14 +2077,11 @@ uint8_t* CreateRequest::_InternalSerialize(
     target = ::_pbi::WireFormatLite::WriteBoolToArray(4, this->_internal_create_if_not_exists(), target);
   }
 
-  // string expire_when = 5;
-  if (!this->_internal_expire_when().empty()) {
-    ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::VerifyUtf8String(
-      this->_internal_expire_when().data(), static_cast<int>(this->_internal_expire_when().length()),
-      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::SERIALIZE,
-      "greptime.v1.flow.CreateRequest.expire_when");
-    target = stream->WriteStringMaybeAliased(
-        5, this->_internal_expire_when(), target);
+  // .greptime.v1.ExpireAfter expire_after = 5;
+  if (this->_internal_has_expire_after()) {
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::
+      InternalWriteMessage(5, _Internal::expire_after(this),
+        _Internal::expire_after(this).GetCachedSize(), target, stream);
   }
 
   // string comment = 6;
@@ -2165,13 +2166,6 @@ size_t CreateRequest::ByteSizeLong() const {
     total_size += CreateRequest_FlowOptionsEntry_DoNotUse::Funcs::ByteSizeLong(it->first, it->second);
   }
 
-  // string expire_when = 5;
-  if (!this->_internal_expire_when().empty()) {
-    total_size += 1 +
-      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::StringSize(
-        this->_internal_expire_when());
-  }
-
   // string comment = 6;
   if (!this->_internal_comment().empty()) {
     total_size += 1 +
@@ -2200,6 +2194,13 @@ size_t CreateRequest::ByteSizeLong() const {
         *_impl_.sink_table_name_);
   }
 
+  // .greptime.v1.ExpireAfter expire_after = 5;
+  if (this->_internal_has_expire_after()) {
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::MessageSize(
+        *_impl_.expire_after_);
+  }
+
   // bool create_if_not_exists = 4;
   if (this->_internal_create_if_not_exists() != 0) {
     total_size += 1 + 1;
@@ -2225,9 +2226,6 @@ void CreateRequest::MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const ::
 
   _this->_impl_.source_table_ids_.MergeFrom(from._impl_.source_table_ids_);
   _this->_impl_.flow_options_.MergeFrom(from._impl_.flow_options_);
-  if (!from._internal_expire_when().empty()) {
-    _this->_internal_set_expire_when(from._internal_expire_when());
-  }
   if (!from._internal_comment().empty()) {
     _this->_internal_set_comment(from._internal_comment());
   }
@@ -2242,6 +2240,10 @@ void CreateRequest::MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const ::
     _this->_internal_mutable_sink_table_name()->::greptime::v1::TableName::MergeFrom(
         from._internal_sink_table_name());
   }
+  if (from._internal_has_expire_after()) {
+    _this->_internal_mutable_expire_after()->::greptime::v1::ExpireAfter::MergeFrom(
+        from._internal_expire_after());
+  }
   if (from._internal_create_if_not_exists() != 0) {
     _this->_internal_set_create_if_not_exists(from._internal_create_if_not_exists());
   }
@@ -2266,10 +2268,6 @@ void CreateRequest::InternalSwap(CreateRequest* other) {
   _internal_metadata_.InternalSwap(&other->_internal_metadata_);
   _impl_.source_table_ids_.InternalSwap(&other->_impl_.source_table_ids_);
   _impl_.flow_options_.InternalSwap(&other->_impl_.flow_options_);
-  ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::InternalSwap(
-      &_impl_.expire_when_, lhs_arena,
-      &other->_impl_.expire_when_, rhs_arena
-  );
   ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::InternalSwap(
       &_impl_.comment_, lhs_arena,
       &other->_impl_.comment_, rhs_arena
diff --git a/c++/greptime/v1/flow/server.pb.h b/c++/greptime/v1/flow/server.pb.h
index 45f891ee..dd641c56 100644
--- a/c++/greptime/v1/flow/server.pb.h
+++ b/c++/greptime/v1/flow/server.pb.h
@@ -1250,11 +1250,11 @@ class CreateRequest final :
   enum : int {
     kSourceTableIdsFieldNumber = 2,
     kFlowOptionsFieldNumber = 8,
-    kExpireWhenFieldNumber = 5,
     kCommentFieldNumber = 6,
     kSqlFieldNumber = 7,
     kFlowIdFieldNumber = 1,
     kSinkTableNameFieldNumber = 3,
+    kExpireAfterFieldNumber = 5,
     kCreateIfNotExistsFieldNumber = 4,
   };
   // repeated .greptime.v1.TableId source_table_ids = 2;
@@ -1292,20 +1292,6 @@ class CreateRequest final :
   ::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >*
       mutable_flow_options();
 
-  // string expire_when = 5;
-  void clear_expire_when();
-  const std::string& expire_when() const;
-  template <typename ArgT0 = const std::string&, typename... ArgT>
-  void set_expire_when(ArgT0&& arg0, ArgT... args);
-  std::string* mutable_expire_when();
-  PROTOBUF_NODISCARD std::string* release_expire_when();
-  void set_allocated_expire_when(std::string* expire_when);
-  private:
-  const std::string& _internal_expire_when() const;
-  inline PROTOBUF_ALWAYS_INLINE void _internal_set_expire_when(const std::string& value);
-  std::string* _internal_mutable_expire_when();
-  public:
-
   // string comment = 6;
   void clear_comment();
   const std::string& comment() const;
@@ -1370,6 +1356,24 @@ class CreateRequest final :
       ::greptime::v1::TableName* sink_table_name);
   ::greptime::v1::TableName* unsafe_arena_release_sink_table_name();
 
+  // .greptime.v1.ExpireAfter expire_after = 5;
+  bool has_expire_after() const;
+  private:
+  bool _internal_has_expire_after() const;
+  public:
+  void clear_expire_after();
+  const ::greptime::v1::ExpireAfter& expire_after() const;
+  PROTOBUF_NODISCARD ::greptime::v1::ExpireAfter* release_expire_after();
+  ::greptime::v1::ExpireAfter* mutable_expire_after();
+  void set_allocated_expire_after(::greptime::v1::ExpireAfter* expire_after);
+  private:
+  const ::greptime::v1::ExpireAfter& _internal_expire_after() const;
+  ::greptime::v1::ExpireAfter* _internal_mutable_expire_after();
+  public:
+  void unsafe_arena_set_allocated_expire_after(
+      ::greptime::v1::ExpireAfter* expire_after);
+  ::greptime::v1::ExpireAfter* unsafe_arena_release_expire_after();
+
   // bool create_if_not_exists = 4;
   void clear_create_if_not_exists();
   bool create_if_not_exists() const;
@@ -1393,11 +1397,11 @@ class CreateRequest final :
         std::string, std::string,
         ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::TYPE_STRING,
         ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::TYPE_STRING> flow_options_;
-    ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr expire_when_;
     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr comment_;
     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr sql_;
     ::greptime::v1::FlowId* flow_id_;
     ::greptime::v1::TableName* sink_table_name_;
+    ::greptime::v1::ExpireAfter* expire_after_;
     bool create_if_not_exists_;
     mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
   };
@@ -2502,54 +2506,89 @@ inline void CreateRequest::set_create_if_not_exists(bool value) {
   // @@protoc_insertion_point(field_set:greptime.v1.flow.CreateRequest.create_if_not_exists)
 }
 
-// string expire_when = 5;
-inline void CreateRequest::clear_expire_when() {
-  _impl_.expire_when_.ClearToEmpty();
+// .greptime.v1.ExpireAfter expire_after = 5;
+inline bool CreateRequest::_internal_has_expire_after() const {
+  return this != internal_default_instance() && _impl_.expire_after_ != nullptr;
 }
-inline const std::string& CreateRequest::expire_when() const {
-  // @@protoc_insertion_point(field_get:greptime.v1.flow.CreateRequest.expire_when)
-  return _internal_expire_when();
+inline bool CreateRequest::has_expire_after() const {
+  return _internal_has_expire_after();
 }
-template <typename ArgT0, typename... ArgT>
-inline PROTOBUF_ALWAYS_INLINE
-void CreateRequest::set_expire_when(ArgT0&& arg0, ArgT... args) {
- 
- _impl_.expire_when_.Set(static_cast<ArgT0 &&>(arg0), args..., GetArenaForAllocation());
-  // @@protoc_insertion_point(field_set:greptime.v1.flow.CreateRequest.expire_when)
+inline const ::greptime::v1::ExpireAfter& CreateRequest::_internal_expire_after() const {
+  const ::greptime::v1::ExpireAfter* p = _impl_.expire_after_;
+  return p != nullptr ? *p : reinterpret_cast<const ::greptime::v1::ExpireAfter&>(
+      ::greptime::v1::_ExpireAfter_default_instance_);
 }
-inline std::string* CreateRequest::mutable_expire_when() {
-  std::string* _s = _internal_mutable_expire_when();
-  // @@protoc_insertion_point(field_mutable:greptime.v1.flow.CreateRequest.expire_when)
-  return _s;
+inline const ::greptime::v1::ExpireAfter& CreateRequest::expire_after() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.flow.CreateRequest.expire_after)
+  return _internal_expire_after();
 }
-inline const std::string& CreateRequest::_internal_expire_when() const {
-  return _impl_.expire_when_.Get();
+inline void CreateRequest::unsafe_arena_set_allocated_expire_after(
+    ::greptime::v1::ExpireAfter* expire_after) {
+  if (GetArenaForAllocation() == nullptr) {
+    delete reinterpret_cast<::PROTOBUF_NAMESPACE_ID::MessageLite*>(_impl_.expire_after_);
+  }
+  _impl_.expire_after_ = expire_after;
+  if (expire_after) {
+    
+  } else {
+    
+  }
+  // @@protoc_insertion_point(field_unsafe_arena_set_allocated:greptime.v1.flow.CreateRequest.expire_after)
+}
+inline ::greptime::v1::ExpireAfter* CreateRequest::release_expire_after() {
+  
+  ::greptime::v1::ExpireAfter* temp = _impl_.expire_after_;
+  _impl_.expire_after_ = nullptr;
+#ifdef PROTOBUF_FORCE_COPY_IN_RELEASE
+  auto* old =  reinterpret_cast<::PROTOBUF_NAMESPACE_ID::MessageLite*>(temp);
+  temp = ::PROTOBUF_NAMESPACE_ID::internal::DuplicateIfNonNull(temp);
+  if (GetArenaForAllocation() == nullptr) { delete old; }
+#else  // PROTOBUF_FORCE_COPY_IN_RELEASE
+  if (GetArenaForAllocation() != nullptr) {
+    temp = ::PROTOBUF_NAMESPACE_ID::internal::DuplicateIfNonNull(temp);
+  }
+#endif  // !PROTOBUF_FORCE_COPY_IN_RELEASE
+  return temp;
 }
-inline void CreateRequest::_internal_set_expire_when(const std::string& value) {
+inline ::greptime::v1::ExpireAfter* CreateRequest::unsafe_arena_release_expire_after() {
+  // @@protoc_insertion_point(field_release:greptime.v1.flow.CreateRequest.expire_after)
   
-  _impl_.expire_when_.Set(value, GetArenaForAllocation());
+  ::greptime::v1::ExpireAfter* temp = _impl_.expire_after_;
+  _impl_.expire_after_ = nullptr;
+  return temp;
 }
-inline std::string* CreateRequest::_internal_mutable_expire_when() {
+inline ::greptime::v1::ExpireAfter* CreateRequest::_internal_mutable_expire_after() {
   
-  return _impl_.expire_when_.Mutable(GetArenaForAllocation());
+  if (_impl_.expire_after_ == nullptr) {
+    auto* p = CreateMaybeMessage<::greptime::v1::ExpireAfter>(GetArenaForAllocation());
+    _impl_.expire_after_ = p;
+  }
+  return _impl_.expire_after_;
 }
-inline std::string* CreateRequest::release_expire_when() {
-  // @@protoc_insertion_point(field_release:greptime.v1.flow.CreateRequest.expire_when)
-  return _impl_.expire_when_.Release();
+inline ::greptime::v1::ExpireAfter* CreateRequest::mutable_expire_after() {
+  ::greptime::v1::ExpireAfter* _msg = _internal_mutable_expire_after();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.flow.CreateRequest.expire_after)
+  return _msg;
 }
-inline void CreateRequest::set_allocated_expire_when(std::string* expire_when) {
-  if (expire_when != nullptr) {
+inline void CreateRequest::set_allocated_expire_after(::greptime::v1::ExpireAfter* expire_after) {
+  ::PROTOBUF_NAMESPACE_ID::Arena* message_arena = GetArenaForAllocation();
+  if (message_arena == nullptr) {
+    delete reinterpret_cast< ::PROTOBUF_NAMESPACE_ID::MessageLite*>(_impl_.expire_after_);
+  }
+  if (expire_after) {
+    ::PROTOBUF_NAMESPACE_ID::Arena* submessage_arena =
+        ::PROTOBUF_NAMESPACE_ID::Arena::InternalGetOwningArena(
+                reinterpret_cast<::PROTOBUF_NAMESPACE_ID::MessageLite*>(expire_after));
+    if (message_arena != submessage_arena) {
+      expire_after = ::PROTOBUF_NAMESPACE_ID::internal::GetOwnedMessage(
+          message_arena, expire_after, submessage_arena);
+    }
     
   } else {
     
   }
-  _impl_.expire_when_.SetAllocated(expire_when, GetArenaForAllocation());
-#ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
-  if (_impl_.expire_when_.IsDefault()) {
-    _impl_.expire_when_.Set("", GetArenaForAllocation());
-  }
-#endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
-  // @@protoc_insertion_point(field_set_allocated:greptime.v1.flow.CreateRequest.expire_when)
+  _impl_.expire_after_ = expire_after;
+  // @@protoc_insertion_point(field_set_allocated:greptime.v1.flow.CreateRequest.expire_after)
 }
 
 // string comment = 6;
diff --git a/go/greptime/v1/common.pb.go b/go/greptime/v1/common.pb.go
index 3416436e..8a34f275 100644
--- a/go/greptime/v1/common.pb.go
+++ b/go/greptime/v1/common.pb.go
@@ -812,6 +812,53 @@ func (x *Metrics) GetMetrics() []byte {
 	return nil
 }
 
+type ExpireAfter struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Value int64 `protobuf:"varint,1,opt,name=value,proto3" json:"value,omitempty"`
+}
+
+func (x *ExpireAfter) Reset() {
+	*x = ExpireAfter{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_greptime_v1_common_proto_msgTypes[10]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ExpireAfter) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ExpireAfter) ProtoMessage() {}
+
+func (x *ExpireAfter) ProtoReflect() protoreflect.Message {
+	mi := &file_greptime_v1_common_proto_msgTypes[10]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ExpireAfter.ProtoReflect.Descriptor instead.
+func (*ExpireAfter) Descriptor() ([]byte, []int) {
+	return file_greptime_v1_common_proto_rawDescGZIP(), []int{10}
+}
+
+func (x *ExpireAfter) GetValue() int64 {
+	if x != nil {
+		return x.Value
+	}
+	return 0
+}
+
 type FlightMetadata struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -824,7 +871,7 @@ type FlightMetadata struct {
 func (x *FlightMetadata) Reset() {
 	*x = FlightMetadata{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_common_proto_msgTypes[10]
+		mi := &file_greptime_v1_common_proto_msgTypes[11]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -837,7 +884,7 @@ func (x *FlightMetadata) String() string {
 func (*FlightMetadata) ProtoMessage() {}
 
 func (x *FlightMetadata) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_common_proto_msgTypes[10]
+	mi := &file_greptime_v1_common_proto_msgTypes[11]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -850,7 +897,7 @@ func (x *FlightMetadata) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FlightMetadata.ProtoReflect.Descriptor instead.
 func (*FlightMetadata) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_common_proto_rawDescGZIP(), []int{10}
+	return file_greptime_v1_common_proto_rawDescGZIP(), []int{11}
 }
 
 func (x *FlightMetadata) GetAffectedRows() *AffectedRows {
@@ -880,7 +927,7 @@ type IntervalMonthDayNano struct {
 func (x *IntervalMonthDayNano) Reset() {
 	*x = IntervalMonthDayNano{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_common_proto_msgTypes[11]
+		mi := &file_greptime_v1_common_proto_msgTypes[12]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -893,7 +940,7 @@ func (x *IntervalMonthDayNano) String() string {
 func (*IntervalMonthDayNano) ProtoMessage() {}
 
 func (x *IntervalMonthDayNano) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_common_proto_msgTypes[11]
+	mi := &file_greptime_v1_common_proto_msgTypes[12]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -906,7 +953,7 @@ func (x *IntervalMonthDayNano) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use IntervalMonthDayNano.ProtoReflect.Descriptor instead.
 func (*IntervalMonthDayNano) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_common_proto_rawDescGZIP(), []int{11}
+	return file_greptime_v1_common_proto_rawDescGZIP(), []int{12}
 }
 
 func (x *IntervalMonthDayNano) GetMonths() int32 {
@@ -943,7 +990,7 @@ type Decimal128 struct {
 func (x *Decimal128) Reset() {
 	*x = Decimal128{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_common_proto_msgTypes[12]
+		mi := &file_greptime_v1_common_proto_msgTypes[13]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -956,7 +1003,7 @@ func (x *Decimal128) String() string {
 func (*Decimal128) ProtoMessage() {}
 
 func (x *Decimal128) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_common_proto_msgTypes[12]
+	mi := &file_greptime_v1_common_proto_msgTypes[13]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -969,7 +1016,7 @@ func (x *Decimal128) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Decimal128.ProtoReflect.Descriptor instead.
 func (*Decimal128) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_common_proto_rawDescGZIP(), []int{12}
+	return file_greptime_v1_common_proto_rawDescGZIP(), []int{13}
 }
 
 func (x *Decimal128) GetHi() int64 {
@@ -1001,7 +1048,7 @@ type ColumnDataTypeExtension struct {
 func (x *ColumnDataTypeExtension) Reset() {
 	*x = ColumnDataTypeExtension{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_common_proto_msgTypes[13]
+		mi := &file_greptime_v1_common_proto_msgTypes[14]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1014,7 +1061,7 @@ func (x *ColumnDataTypeExtension) String() string {
 func (*ColumnDataTypeExtension) ProtoMessage() {}
 
 func (x *ColumnDataTypeExtension) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_common_proto_msgTypes[13]
+	mi := &file_greptime_v1_common_proto_msgTypes[14]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1027,7 +1074,7 @@ func (x *ColumnDataTypeExtension) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ColumnDataTypeExtension.ProtoReflect.Descriptor instead.
 func (*ColumnDataTypeExtension) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_common_proto_rawDescGZIP(), []int{13}
+	return file_greptime_v1_common_proto_rawDescGZIP(), []int{14}
 }
 
 func (m *ColumnDataTypeExtension) GetTypeExt() isColumnDataTypeExtension_TypeExt {
@@ -1066,7 +1113,7 @@ type DecimalTypeExtension struct {
 func (x *DecimalTypeExtension) Reset() {
 	*x = DecimalTypeExtension{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_common_proto_msgTypes[14]
+		mi := &file_greptime_v1_common_proto_msgTypes[15]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1079,7 +1126,7 @@ func (x *DecimalTypeExtension) String() string {
 func (*DecimalTypeExtension) ProtoMessage() {}
 
 func (x *DecimalTypeExtension) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_common_proto_msgTypes[14]
+	mi := &file_greptime_v1_common_proto_msgTypes[15]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1092,7 +1139,7 @@ func (x *DecimalTypeExtension) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DecimalTypeExtension.ProtoReflect.Descriptor instead.
 func (*DecimalTypeExtension) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_common_proto_rawDescGZIP(), []int{14}
+	return file_greptime_v1_common_proto_rawDescGZIP(), []int{15}
 }
 
 func (x *DecimalTypeExtension) GetPrecision() int32 {
@@ -1185,74 +1232,76 @@ var file_greptime_v1_common_proto_rawDesc = []byte{
 	0x75, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0d, 0x52, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x22,
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 }
 
 var (
@@ -1268,7 +1317,7 @@ func file_greptime_v1_common_proto_rawDescGZIP() []byte {
 }
 
 var file_greptime_v1_common_proto_enumTypes = make([]protoimpl.EnumInfo, 2)
-var file_greptime_v1_common_proto_msgTypes = make([]protoimpl.MessageInfo, 17)
+var file_greptime_v1_common_proto_msgTypes = make([]protoimpl.MessageInfo, 18)
 var file_greptime_v1_common_proto_goTypes = []interface{}{
 	(SemanticType)(0),               // 0: greptime.v1.SemanticType
 	(ColumnDataType)(0),             // 1: greptime.v1.ColumnDataType
@@ -1282,24 +1331,25 @@ var file_greptime_v1_common_proto_goTypes = []interface{}{
 	(*TableName)(nil),               // 9: greptime.v1.TableName
 	(*AffectedRows)(nil),            // 10: greptime.v1.AffectedRows
 	(*Metrics)(nil),                 // 11: greptime.v1.Metrics
-	(*FlightMetadata)(nil),          // 12: greptime.v1.FlightMetadata
-	(*IntervalMonthDayNano)(nil),    // 13: greptime.v1.IntervalMonthDayNano
-	(*Decimal128)(nil),              // 14: greptime.v1.Decimal128
-	(*ColumnDataTypeExtension)(nil), // 15: greptime.v1.ColumnDataTypeExtension
-	(*DecimalTypeExtension)(nil),    // 16: greptime.v1.DecimalTypeExtension
-	nil,                             // 17: greptime.v1.QueryContext.ExtensionsEntry
-	nil,                             // 18: greptime.v1.RequestHeader.TracingContextEntry
+	(*ExpireAfter)(nil),             // 12: greptime.v1.ExpireAfter
+	(*FlightMetadata)(nil),          // 13: greptime.v1.FlightMetadata
+	(*IntervalMonthDayNano)(nil),    // 14: greptime.v1.IntervalMonthDayNano
+	(*Decimal128)(nil),              // 15: greptime.v1.Decimal128
+	(*ColumnDataTypeExtension)(nil), // 16: greptime.v1.ColumnDataTypeExtension
+	(*DecimalTypeExtension)(nil),    // 17: greptime.v1.DecimalTypeExtension
+	nil,                             // 18: greptime.v1.QueryContext.ExtensionsEntry
+	nil,                             // 19: greptime.v1.RequestHeader.TracingContextEntry
 }
 var file_greptime_v1_common_proto_depIdxs = []int32{
-	17, // 0: greptime.v1.QueryContext.extensions:type_name -> greptime.v1.QueryContext.ExtensionsEntry
+	18, // 0: greptime.v1.QueryContext.extensions:type_name -> greptime.v1.QueryContext.ExtensionsEntry
 	6,  // 1: greptime.v1.RequestHeader.authorization:type_name -> greptime.v1.AuthHeader
-	18, // 2: greptime.v1.RequestHeader.tracing_context:type_name -> greptime.v1.RequestHeader.TracingContextEntry
+	19, // 2: greptime.v1.RequestHeader.tracing_context:type_name -> greptime.v1.RequestHeader.TracingContextEntry
 	5,  // 3: greptime.v1.ResponseHeader.status:type_name -> greptime.v1.Status
 	7,  // 4: greptime.v1.AuthHeader.basic:type_name -> greptime.v1.Basic
 	8,  // 5: greptime.v1.AuthHeader.token:type_name -> greptime.v1.Token
 	10, // 6: greptime.v1.FlightMetadata.affected_rows:type_name -> greptime.v1.AffectedRows
 	11, // 7: greptime.v1.FlightMetadata.metrics:type_name -> greptime.v1.Metrics
-	16, // 8: greptime.v1.ColumnDataTypeExtension.decimal_type:type_name -> greptime.v1.DecimalTypeExtension
+	17, // 8: greptime.v1.ColumnDataTypeExtension.decimal_type:type_name -> greptime.v1.DecimalTypeExtension
 	9,  // [9:9] is the sub-list for method output_type
 	9,  // [9:9] is the sub-list for method input_type
 	9,  // [9:9] is the sub-list for extension type_name
@@ -1434,7 +1484,7 @@ func file_greptime_v1_common_proto_init() {
 			}
 		}
 		file_greptime_v1_common_proto_msgTypes[10].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*FlightMetadata); i {
+			switch v := v.(*ExpireAfter); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1446,7 +1496,7 @@ func file_greptime_v1_common_proto_init() {
 			}
 		}
 		file_greptime_v1_common_proto_msgTypes[11].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*IntervalMonthDayNano); i {
+			switch v := v.(*FlightMetadata); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1458,7 +1508,7 @@ func file_greptime_v1_common_proto_init() {
 			}
 		}
 		file_greptime_v1_common_proto_msgTypes[12].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*Decimal128); i {
+			switch v := v.(*IntervalMonthDayNano); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1470,7 +1520,7 @@ func file_greptime_v1_common_proto_init() {
 			}
 		}
 		file_greptime_v1_common_proto_msgTypes[13].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ColumnDataTypeExtension); i {
+			switch v := v.(*Decimal128); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1482,6 +1532,18 @@ func file_greptime_v1_common_proto_init() {
 			}
 		}
 		file_greptime_v1_common_proto_msgTypes[14].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ColumnDataTypeExtension); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_greptime_v1_common_proto_msgTypes[15].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*DecimalTypeExtension); i {
 			case 0:
 				return &v.state
@@ -1498,7 +1560,7 @@ func file_greptime_v1_common_proto_init() {
 		(*AuthHeader_Basic)(nil),
 		(*AuthHeader_Token)(nil),
 	}
-	file_greptime_v1_common_proto_msgTypes[13].OneofWrappers = []interface{}{
+	file_greptime_v1_common_proto_msgTypes[14].OneofWrappers = []interface{}{
 		(*ColumnDataTypeExtension_DecimalType)(nil),
 	}
 	type x struct{}
@@ -1507,7 +1569,7 @@ func file_greptime_v1_common_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_greptime_v1_common_proto_rawDesc,
 			NumEnums:      2,
-			NumMessages:   17,
+			NumMessages:   18,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/go/greptime/v1/ddl.pb.go b/go/greptime/v1/ddl.pb.go
index d7baee7f..d3ae4f66 100644
--- a/go/greptime/v1/ddl.pb.go
+++ b/go/greptime/v1/ddl.pb.go
@@ -269,16 +269,17 @@ type CreateFlowExpr struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	CatalogName       string            `protobuf:"bytes,1,opt,name=catalog_name,json=catalogName,proto3" json:"catalog_name,omitempty"`
-	FlowName          string            `protobuf:"bytes,2,opt,name=flow_name,json=flowName,proto3" json:"flow_name,omitempty"`
-	SourceTableNames  []*TableName      `protobuf:"bytes,3,rep,name=source_table_names,json=sourceTableNames,proto3" json:"source_table_names,omitempty"`
-	SinkTableName     *TableName        `protobuf:"bytes,4,opt,name=sink_table_name,json=sinkTableName,proto3" json:"sink_table_name,omitempty"`
-	OrReplace         bool              `protobuf:"varint,5,opt,name=or_replace,json=orReplace,proto3" json:"or_replace,omitempty"`
-	CreateIfNotExists bool              `protobuf:"varint,6,opt,name=create_if_not_exists,json=createIfNotExists,proto3" json:"create_if_not_exists,omitempty"`
-	ExpireWhen        string            `protobuf:"bytes,7,opt,name=expire_when,json=expireWhen,proto3" json:"expire_when,omitempty"`
-	Comment           string            `protobuf:"bytes,8,opt,name=comment,proto3" json:"comment,omitempty"`
-	Sql               string            `protobuf:"bytes,9,opt,name=sql,proto3" json:"sql,omitempty"`
-	FlowOptions       map[string]string `protobuf:"bytes,10,rep,name=flow_options,json=flowOptions,proto3" json:"flow_options,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
+	CatalogName       string       `protobuf:"bytes,1,opt,name=catalog_name,json=catalogName,proto3" json:"catalog_name,omitempty"`
+	FlowName          string       `protobuf:"bytes,2,opt,name=flow_name,json=flowName,proto3" json:"flow_name,omitempty"`
+	SourceTableNames  []*TableName `protobuf:"bytes,3,rep,name=source_table_names,json=sourceTableNames,proto3" json:"source_table_names,omitempty"`
+	SinkTableName     *TableName   `protobuf:"bytes,4,opt,name=sink_table_name,json=sinkTableName,proto3" json:"sink_table_name,omitempty"`
+	OrReplace         bool         `protobuf:"varint,5,opt,name=or_replace,json=orReplace,proto3" json:"or_replace,omitempty"`
+	CreateIfNotExists bool         `protobuf:"varint,6,opt,name=create_if_not_exists,json=createIfNotExists,proto3" json:"create_if_not_exists,omitempty"`
+	// Expire data older than the given duration seconds.
+	ExpireAfter *ExpireAfter      `protobuf:"bytes,7,opt,name=expire_after,json=expireAfter,proto3" json:"expire_after,omitempty"`
+	Comment     string            `protobuf:"bytes,8,opt,name=comment,proto3" json:"comment,omitempty"`
+	Sql         string            `protobuf:"bytes,9,opt,name=sql,proto3" json:"sql,omitempty"`
+	FlowOptions map[string]string `protobuf:"bytes,10,rep,name=flow_options,json=flowOptions,proto3" json:"flow_options,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
 }
 
 func (x *CreateFlowExpr) Reset() {
@@ -355,11 +356,11 @@ func (x *CreateFlowExpr) GetCreateIfNotExists() bool {
 	return false
 }
 
-func (x *CreateFlowExpr) GetExpireWhen() string {
+func (x *CreateFlowExpr) GetExpireAfter() *ExpireAfter {
 	if x != nil {
-		return x.ExpireWhen
+		return x.ExpireAfter
 	}
-	return ""
+	return nil
 }
 
 func (x *CreateFlowExpr) GetComment() string {
@@ -1808,7 +1809,7 @@ var file_greptime_v1_ddl_proto_rawDesc = []byte{
 	0x64, 0x72, 0x6f, 0x70, 0x5f, 0x76, 0x69, 0x65, 0x77, 0x18, 0x0b, 0x20, 0x01, 0x28, 0x0b, 0x32,
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 	0x04, 0x0a, 0x0e, 0x43, 0x72, 0x65, 0x61, 0x74, 0x65, 0x46, 0x6c, 0x6f, 0x77, 0x45, 0x78, 0x70,
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@@ -1827,248 +1828,249 @@ var file_greptime_v1_ddl_proto_rawDesc = []byte{
 	0x65, 0x70, 0x6c, 0x61, 0x63, 0x65, 0x12, 0x2f, 0x0a, 0x14, 0x63, 0x72, 0x65, 0x61, 0x74, 0x65,
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 }
 
 var (
@@ -2113,9 +2115,10 @@ var file_greptime_v1_ddl_proto_goTypes = []interface{}{
 	nil,                                 // 24: greptime.v1.CreateTableExpr.TableOptionsEntry
 	nil,                                 // 25: greptime.v1.CreateDatabaseExpr.OptionsEntry
 	(*TableName)(nil),                   // 26: greptime.v1.TableName
-	(ColumnDataType)(0),                 // 27: greptime.v1.ColumnDataType
-	(*ColumnDataTypeExtension)(nil),     // 28: greptime.v1.ColumnDataTypeExtension
-	(SemanticType)(0),                   // 29: greptime.v1.SemanticType
+	(*ExpireAfter)(nil),                 // 27: greptime.v1.ExpireAfter
+	(ColumnDataType)(0),                 // 28: greptime.v1.ColumnDataType
+	(*ColumnDataTypeExtension)(nil),     // 29: greptime.v1.ColumnDataTypeExtension
+	(SemanticType)(0),                   // 30: greptime.v1.SemanticType
 }
 var file_greptime_v1_ddl_proto_depIdxs = []int32{
 	9,  // 0: greptime.v1.DdlRequest.create_database:type_name -> greptime.v1.CreateDatabaseExpr
@@ -2129,35 +2132,36 @@ var file_greptime_v1_ddl_proto_depIdxs = []int32{
 	5,  // 8: greptime.v1.DdlRequest.drop_view:type_name -> greptime.v1.DropViewExpr
 	26, // 9: greptime.v1.CreateFlowExpr.source_table_names:type_name -> greptime.v1.TableName
 	26, // 10: greptime.v1.CreateFlowExpr.sink_table_name:type_name -> greptime.v1.TableName
-	23, // 11: greptime.v1.CreateFlowExpr.flow_options:type_name -> greptime.v1.CreateFlowExpr.FlowOptionsEntry
-	20, // 12: greptime.v1.DropFlowExpr.flow_id:type_name -> greptime.v1.FlowId
-	19, // 13: greptime.v1.DropViewExpr.view_id:type_name -> greptime.v1.TableId
-	21, // 14: greptime.v1.CreateTableExpr.column_defs:type_name -> greptime.v1.ColumnDef
-	24, // 15: greptime.v1.CreateTableExpr.table_options:type_name -> greptime.v1.CreateTableExpr.TableOptionsEntry
-	19, // 16: greptime.v1.CreateTableExpr.table_id:type_name -> greptime.v1.TableId
-	12, // 17: greptime.v1.AlterExpr.add_columns:type_name -> greptime.v1.AddColumns
-	13, // 18: greptime.v1.AlterExpr.drop_columns:type_name -> greptime.v1.DropColumns
-	15, // 19: greptime.v1.AlterExpr.rename_table:type_name -> greptime.v1.RenameTable
-	14, // 20: greptime.v1.AlterExpr.change_column_types:type_name -> greptime.v1.ChangeColumnTypes
-	19, // 21: greptime.v1.DropTableExpr.table_id:type_name -> greptime.v1.TableId
-	25, // 22: greptime.v1.CreateDatabaseExpr.options:type_name -> greptime.v1.CreateDatabaseExpr.OptionsEntry
-	19, // 23: greptime.v1.TruncateTableExpr.table_id:type_name -> greptime.v1.TableId
-	16, // 24: greptime.v1.AddColumns.add_columns:type_name -> greptime.v1.AddColumn
-	18, // 25: greptime.v1.DropColumns.drop_columns:type_name -> greptime.v1.DropColumn
-	17, // 26: greptime.v1.ChangeColumnTypes.change_column_types:type_name -> greptime.v1.ChangeColumnType
-	21, // 27: greptime.v1.AddColumn.column_def:type_name -> greptime.v1.ColumnDef
-	22, // 28: greptime.v1.AddColumn.location:type_name -> greptime.v1.AddColumnLocation
-	27, // 29: greptime.v1.ChangeColumnType.target_type:type_name -> greptime.v1.ColumnDataType
-	28, // 30: greptime.v1.ChangeColumnType.target_type_extension:type_name -> greptime.v1.ColumnDataTypeExtension
-	27, // 31: greptime.v1.ColumnDef.data_type:type_name -> greptime.v1.ColumnDataType
-	29, // 32: greptime.v1.ColumnDef.semantic_type:type_name -> greptime.v1.SemanticType
-	28, // 33: greptime.v1.ColumnDef.datatype_extension:type_name -> greptime.v1.ColumnDataTypeExtension
-	0,  // 34: greptime.v1.AddColumnLocation.location_type:type_name -> greptime.v1.AddColumnLocation.LocationType
-	35, // [35:35] is the sub-list for method output_type
-	35, // [35:35] is the sub-list for method input_type
-	35, // [35:35] is the sub-list for extension type_name
-	35, // [35:35] is the sub-list for extension extendee
-	0,  // [0:35] is the sub-list for field type_name
+	27, // 11: greptime.v1.CreateFlowExpr.expire_after:type_name -> greptime.v1.ExpireAfter
+	23, // 12: greptime.v1.CreateFlowExpr.flow_options:type_name -> greptime.v1.CreateFlowExpr.FlowOptionsEntry
+	20, // 13: greptime.v1.DropFlowExpr.flow_id:type_name -> greptime.v1.FlowId
+	19, // 14: greptime.v1.DropViewExpr.view_id:type_name -> greptime.v1.TableId
+	21, // 15: greptime.v1.CreateTableExpr.column_defs:type_name -> greptime.v1.ColumnDef
+	24, // 16: greptime.v1.CreateTableExpr.table_options:type_name -> greptime.v1.CreateTableExpr.TableOptionsEntry
+	19, // 17: greptime.v1.CreateTableExpr.table_id:type_name -> greptime.v1.TableId
+	12, // 18: greptime.v1.AlterExpr.add_columns:type_name -> greptime.v1.AddColumns
+	13, // 19: greptime.v1.AlterExpr.drop_columns:type_name -> greptime.v1.DropColumns
+	15, // 20: greptime.v1.AlterExpr.rename_table:type_name -> greptime.v1.RenameTable
+	14, // 21: greptime.v1.AlterExpr.change_column_types:type_name -> greptime.v1.ChangeColumnTypes
+	19, // 22: greptime.v1.DropTableExpr.table_id:type_name -> greptime.v1.TableId
+	25, // 23: greptime.v1.CreateDatabaseExpr.options:type_name -> greptime.v1.CreateDatabaseExpr.OptionsEntry
+	19, // 24: greptime.v1.TruncateTableExpr.table_id:type_name -> greptime.v1.TableId
+	16, // 25: greptime.v1.AddColumns.add_columns:type_name -> greptime.v1.AddColumn
+	18, // 26: greptime.v1.DropColumns.drop_columns:type_name -> greptime.v1.DropColumn
+	17, // 27: greptime.v1.ChangeColumnTypes.change_column_types:type_name -> greptime.v1.ChangeColumnType
+	21, // 28: greptime.v1.AddColumn.column_def:type_name -> greptime.v1.ColumnDef
+	22, // 29: greptime.v1.AddColumn.location:type_name -> greptime.v1.AddColumnLocation
+	28, // 30: greptime.v1.ChangeColumnType.target_type:type_name -> greptime.v1.ColumnDataType
+	29, // 31: greptime.v1.ChangeColumnType.target_type_extension:type_name -> greptime.v1.ColumnDataTypeExtension
+	28, // 32: greptime.v1.ColumnDef.data_type:type_name -> greptime.v1.ColumnDataType
+	30, // 33: greptime.v1.ColumnDef.semantic_type:type_name -> greptime.v1.SemanticType
+	29, // 34: greptime.v1.ColumnDef.datatype_extension:type_name -> greptime.v1.ColumnDataTypeExtension
+	0,  // 35: greptime.v1.AddColumnLocation.location_type:type_name -> greptime.v1.AddColumnLocation.LocationType
+	36, // [36:36] is the sub-list for method output_type
+	36, // [36:36] is the sub-list for method input_type
+	36, // [36:36] is the sub-list for extension type_name
+	36, // [36:36] is the sub-list for extension extendee
+	0,  // [0:36] is the sub-list for field type_name
 }
 
 func init() { file_greptime_v1_ddl_proto_init() }
diff --git a/java/src/main/java/io/greptime/v1/Common.java b/java/src/main/java/io/greptime/v1/Common.java
index 08d33c4a..f2d8bcf6 100644
--- a/java/src/main/java/io/greptime/v1/Common.java
+++ b/java/src/main/java/io/greptime/v1/Common.java
@@ -8869,6 +8869,497 @@ public io.greptime.v1.Common.Metrics getDefaultInstanceForType() {
 
   }
 
+  public interface ExpireAfterOrBuilder extends
+      // @@protoc_insertion_point(interface_extends:greptime.v1.ExpireAfter)
+      com.google.protobuf.MessageOrBuilder {
+
+    /**
+     * <code>int64 value = 1;</code>
+     * @return The value.
+     */
+    long getValue();
+  }
+  /**
+   * Protobuf type {@code greptime.v1.ExpireAfter}
+   */
+  public static final class ExpireAfter extends
+      com.google.protobuf.GeneratedMessageV3 implements
+      // @@protoc_insertion_point(message_implements:greptime.v1.ExpireAfter)
+      ExpireAfterOrBuilder {
+  private static final long serialVersionUID = 0L;
+    // Use ExpireAfter.newBuilder() to construct.
+    private ExpireAfter(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+      super(builder);
+    }
+    private ExpireAfter() {
+    }
+
+    @java.lang.Override
+    @SuppressWarnings({"unused"})
+    protected java.lang.Object newInstance(
+        UnusedPrivateParameter unused) {
+      return new ExpireAfter();
+    }
+
+    @java.lang.Override
+    public final com.google.protobuf.UnknownFieldSet
+    getUnknownFields() {
+      return this.unknownFields;
+    }
+    private ExpireAfter(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      this();
+      if (extensionRegistry == null) {
+        throw new java.lang.NullPointerException();
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+      com.google.protobuf.UnknownFieldSet.Builder unknownFields =
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+          switch (tag) {
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+              value_ = input.readInt64();
+              break;
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+            default: {
+              if (!parseUnknownField(
+                  input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+          }
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+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.setUnfinishedMessage(this);
+      } catch (com.google.protobuf.UninitializedMessageException e) {
+        throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
+      } catch (java.io.IOException e) {
+        throw new com.google.protobuf.InvalidProtocolBufferException(
+            e).setUnfinishedMessage(this);
+      } finally {
+        this.unknownFields = unknownFields.build();
+        makeExtensionsImmutable();
+      }
+    }
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return io.greptime.v1.Common.internal_static_greptime_v1_ExpireAfter_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return io.greptime.v1.Common.internal_static_greptime_v1_ExpireAfter_fieldAccessorTable
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+              io.greptime.v1.Common.ExpireAfter.class, io.greptime.v1.Common.ExpireAfter.Builder.class);
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+
+    public static final int VALUE_FIELD_NUMBER = 1;
+    private long value_;
+    /**
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+    private byte memoizedIsInitialized = -1;
+    @java.lang.Override
+    public final boolean isInitialized() {
+      byte isInitialized = memoizedIsInitialized;
+      if (isInitialized == 1) return true;
+      if (isInitialized == 0) return false;
+
+      memoizedIsInitialized = 1;
+      return true;
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+
+    @java.lang.Override
+    public void writeTo(com.google.protobuf.CodedOutputStream output)
+                        throws java.io.IOException {
+      if (value_ != 0L) {
+        output.writeInt64(1, value_);
+      }
+      unknownFields.writeTo(output);
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+
+    @java.lang.Override
+    public int getSerializedSize() {
+      int size = memoizedSize;
+      if (size != -1) return size;
+
+      size = 0;
+      if (value_ != 0L) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeInt64Size(1, value_);
+      }
+      size += unknownFields.getSerializedSize();
+      memoizedSize = size;
+      return size;
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+
+    @java.lang.Override
+    public boolean equals(final java.lang.Object obj) {
+      if (obj == this) {
+       return true;
+      }
+      if (!(obj instanceof io.greptime.v1.Common.ExpireAfter)) {
+        return super.equals(obj);
+      }
+      io.greptime.v1.Common.ExpireAfter other = (io.greptime.v1.Common.ExpireAfter) obj;
+
+      if (getValue()
+          != other.getValue()) return false;
+      if (!unknownFields.equals(other.unknownFields)) return false;
+      return true;
+    }
+
+    @java.lang.Override
+    public int hashCode() {
+      if (memoizedHashCode != 0) {
+        return memoizedHashCode;
+      }
+      int hash = 41;
+      hash = (19 * hash) + getDescriptor().hashCode();
+      hash = (37 * hash) + VALUE_FIELD_NUMBER;
+      hash = (53 * hash) + com.google.protobuf.Internal.hashLong(
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+      memoizedHashCode = hash;
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+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static io.greptime.v1.Common.ExpireAfter parseFrom(
+        java.nio.ByteBuffer data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static io.greptime.v1.Common.ExpireAfter parseFrom(
+        com.google.protobuf.ByteString data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static io.greptime.v1.Common.ExpireAfter parseFrom(
+        com.google.protobuf.ByteString data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static io.greptime.v1.Common.ExpireAfter parseFrom(byte[] data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static io.greptime.v1.Common.ExpireAfter parseFrom(
+        byte[] data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
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+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3
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+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3
+          .parseDelimitedWithIOException(PARSER, input);
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+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3
+          .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
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+    public static io.greptime.v1.Common.ExpireAfter parseFrom(
+        com.google.protobuf.CodedInputStream input)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3
+          .parseWithIOException(PARSER, input);
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+    public static io.greptime.v1.Common.ExpireAfter parseFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3
+          .parseWithIOException(PARSER, input, extensionRegistry);
+    }
+
+    @java.lang.Override
+    public Builder newBuilderForType() { return newBuilder(); }
+    public static Builder newBuilder() {
+      return DEFAULT_INSTANCE.toBuilder();
+    }
+    public static Builder newBuilder(io.greptime.v1.Common.ExpireAfter prototype) {
+      return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+    }
+    @java.lang.Override
+    public Builder toBuilder() {
+      return this == DEFAULT_INSTANCE
+          ? new Builder() : new Builder().mergeFrom(this);
+    }
+
+    @java.lang.Override
+    protected Builder newBuilderForType(
+        com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      Builder builder = new Builder(parent);
+      return builder;
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+    /**
+     * Protobuf type {@code greptime.v1.ExpireAfter}
+     */
+    public static final class Builder extends
+        com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
+        // @@protoc_insertion_point(builder_implements:greptime.v1.ExpireAfter)
+        io.greptime.v1.Common.ExpireAfterOrBuilder {
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return io.greptime.v1.Common.internal_static_greptime_v1_ExpireAfter_descriptor;
+      }
+
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+      // Construct using io.greptime.v1.Common.ExpireAfter.newBuilder()
+      private Builder() {
+        maybeForceBuilderInitialization();
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+      private Builder(
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+      @java.lang.Override
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+          getDescriptorForType() {
+        return io.greptime.v1.Common.internal_static_greptime_v1_ExpireAfter_descriptor;
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+      @java.lang.Override
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+      public io.greptime.v1.Common.ExpireAfter build() {
+        io.greptime.v1.Common.ExpireAfter result = buildPartial();
+        if (!result.isInitialized()) {
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+      @java.lang.Override
+      public io.greptime.v1.Common.ExpireAfter buildPartial() {
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+        onBuilt();
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+      public Builder setField(
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+      public Builder clearField(
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+      public Builder clearOneof(
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+      @java.lang.Override
+      public Builder setRepeatedField(
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+      public Builder addRepeatedField(
+          com.google.protobuf.Descriptors.FieldDescriptor field,
+          java.lang.Object value) {
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+      @java.lang.Override
+      public Builder mergeFrom(com.google.protobuf.Message other) {
+        if (other instanceof io.greptime.v1.Common.ExpireAfter) {
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+          return this;
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+      public Builder mergeFrom(io.greptime.v1.Common.ExpireAfter other) {
+        if (other == io.greptime.v1.Common.ExpireAfter.getDefaultInstance()) return this;
+        if (other.getValue() != 0L) {
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+        this.mergeUnknownFields(other.unknownFields);
+        onChanged();
+        return this;
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+
+      @java.lang.Override
+      public final boolean isInitialized() {
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+
+      @java.lang.Override
+      public Builder mergeFrom(
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+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        io.greptime.v1.Common.ExpireAfter parsedMessage = null;
+        try {
+          parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+          parsedMessage = (io.greptime.v1.Common.ExpireAfter) e.getUnfinishedMessage();
+          throw e.unwrapIOException();
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+            mergeFrom(parsedMessage);
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+        return this;
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+      @java.lang.Override
+      public long getValue() {
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+      /**
+       * <code>int64 value = 1;</code>
+       * @param value The value to set.
+       * @return This builder for chaining.
+       */
+      public Builder setValue(long value) {
+        
+        value_ = value;
+        onChanged();
+        return this;
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+      /**
+       * <code>int64 value = 1;</code>
+       * @return This builder for chaining.
+       */
+      public Builder clearValue() {
+        
+        value_ = 0L;
+        onChanged();
+        return this;
+      }
+      @java.lang.Override
+      public final Builder setUnknownFields(
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+        return super.setUnknownFields(unknownFields);
+      }
+
+      @java.lang.Override
+      public final Builder mergeUnknownFields(
+          final com.google.protobuf.UnknownFieldSet unknownFields) {
+        return super.mergeUnknownFields(unknownFields);
+      }
+
+
+      // @@protoc_insertion_point(builder_scope:greptime.v1.ExpireAfter)
+    }
+
+    // @@protoc_insertion_point(class_scope:greptime.v1.ExpireAfter)
+    private static final io.greptime.v1.Common.ExpireAfter DEFAULT_INSTANCE;
+    static {
+      DEFAULT_INSTANCE = new io.greptime.v1.Common.ExpireAfter();
+    }
+
+    public static io.greptime.v1.Common.ExpireAfter getDefaultInstance() {
+      return DEFAULT_INSTANCE;
+    }
+
+    private static final com.google.protobuf.Parser<ExpireAfter>
+        PARSER = new com.google.protobuf.AbstractParser<ExpireAfter>() {
+      @java.lang.Override
+      public ExpireAfter parsePartialFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return new ExpireAfter(input, extensionRegistry);
+      }
+    };
+
+    public static com.google.protobuf.Parser<ExpireAfter> parser() {
+      return PARSER;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Parser<ExpireAfter> getParserForType() {
+      return PARSER;
+    }
+
+    @java.lang.Override
+    public io.greptime.v1.Common.ExpireAfter getDefaultInstanceForType() {
+      return DEFAULT_INSTANCE;
+    }
+
+  }
+
   public interface FlightMetadataOrBuilder extends
       // @@protoc_insertion_point(interface_extends:greptime.v1.FlightMetadata)
       com.google.protobuf.MessageOrBuilder {
@@ -12245,6 +12736,11 @@ public io.greptime.v1.Common.DecimalTypeExtension getDefaultInstanceForType() {
   private static final 
     com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
       internal_static_greptime_v1_Metrics_fieldAccessorTable;
+  private static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_greptime_v1_ExpireAfter_descriptor;
+  private static final 
+    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_greptime_v1_ExpireAfter_fieldAccessorTable;
   private static final com.google.protobuf.Descriptors.Descriptor
     internal_static_greptime_v1_FlightMetadata_descriptor;
   private static final 
@@ -12301,32 +12797,33 @@ public io.greptime.v1.Common.DecimalTypeExtension getDefaultInstanceForType() {
       "\n\005token\030\001 \001(\t\"J\n\tTableName\022\024\n\014catalog_na" +
       "me\030\001 \001(\t\022\023\n\013schema_name\030\002 \001(\t\022\022\n\ntable_n" +
       "ame\030\003 \001(\t\"\035\n\014AffectedRows\022\r\n\005value\030\001 \001(\r" +
-      "\"\032\n\007Metrics\022\017\n\007metrics\030\001 \001(\014\"i\n\016FlightMe" +
-      "tadata\0220\n\raffected_rows\030\001 \001(\0132\031.greptime" +
-      ".v1.AffectedRows\022%\n\007metrics\030\002 \001(\0132\024.grep" +
-      "time.v1.Metrics\"I\n\024IntervalMonthDayNano\022" +
-      "\016\n\006months\030\001 \001(\005\022\014\n\004days\030\002 \001(\005\022\023\n\013nanosec" +
-      "onds\030\003 \001(\003\"$\n\nDecimal128\022\n\n\002hi\030\001 \001(\003\022\n\n\002" +
-      "lo\030\002 \001(\003\"`\n\027ColumnDataTypeExtension\0229\n\014d" +
-      "ecimal_type\030\001 \001(\0132!.greptime.v1.DecimalT" +
-      "ypeExtensionH\000B\n\n\010type_ext\"8\n\024DecimalTyp" +
-      "eExtension\022\021\n\tprecision\030\001 \001(\005\022\r\n\005scale\030\002" +
-      " \001(\005*1\n\014SemanticType\022\007\n\003TAG\020\000\022\t\n\005FIELD\020\001" +
-      "\022\r\n\tTIMESTAMP\020\002*\326\003\n\016ColumnDataType\022\013\n\007BO" +
-      "OLEAN\020\000\022\010\n\004INT8\020\001\022\t\n\005INT16\020\002\022\t\n\005INT32\020\003\022" +
-      "\t\n\005INT64\020\004\022\t\n\005UINT8\020\005\022\n\n\006UINT16\020\006\022\n\n\006UIN" +
-      "T32\020\007\022\n\n\006UINT64\020\010\022\013\n\007FLOAT32\020\t\022\013\n\007FLOAT6" +
-      "4\020\n\022\n\n\006BINARY\020\013\022\n\n\006STRING\020\014\022\010\n\004DATE\020\r\022\014\n" +
-      "\010DATETIME\020\016\022\024\n\020TIMESTAMP_SECOND\020\017\022\031\n\025TIM" +
-      "ESTAMP_MILLISECOND\020\020\022\031\n\025TIMESTAMP_MICROS" +
-      "ECOND\020\021\022\030\n\024TIMESTAMP_NANOSECOND\020\022\022\017\n\013TIM" +
-      "E_SECOND\020\023\022\024\n\020TIME_MILLISECOND\020\024\022\024\n\020TIME" +
-      "_MICROSECOND\020\025\022\023\n\017TIME_NANOSECOND\020\026\022\027\n\023I" +
-      "NTERVAL_YEAR_MONTH\020\027\022\025\n\021INTERVAL_DAY_TIM" +
-      "E\020\030\022\033\n\027INTERVAL_MONTH_DAY_NANO\020\031\022\016\n\nDECI" +
-      "MAL128\020\036BO\n\016io.greptime.v1B\006CommonZ5gith" +
-      "ub.com/GreptimeTeam/greptime-proto/go/gr" +
-      "eptime/v1b\006proto3"
+      "\"\032\n\007Metrics\022\017\n\007metrics\030\001 \001(\014\"\034\n\013ExpireAf" +
+      "ter\022\r\n\005value\030\001 \001(\003\"i\n\016FlightMetadata\0220\n\r" +
+      "affected_rows\030\001 \001(\0132\031.greptime.v1.Affect" +
+      "edRows\022%\n\007metrics\030\002 \001(\0132\024.greptime.v1.Me" +
+      "trics\"I\n\024IntervalMonthDayNano\022\016\n\006months\030" +
+      "\001 \001(\005\022\014\n\004days\030\002 \001(\005\022\023\n\013nanoseconds\030\003 \001(\003" +
+      "\"$\n\nDecimal128\022\n\n\002hi\030\001 \001(\003\022\n\n\002lo\030\002 \001(\003\"`" +
+      "\n\027ColumnDataTypeExtension\0229\n\014decimal_typ" +
+      "e\030\001 \001(\0132!.greptime.v1.DecimalTypeExtensi" +
+      "onH\000B\n\n\010type_ext\"8\n\024DecimalTypeExtension" +
+      "\022\021\n\tprecision\030\001 \001(\005\022\r\n\005scale\030\002 \001(\005*1\n\014Se" +
+      "manticType\022\007\n\003TAG\020\000\022\t\n\005FIELD\020\001\022\r\n\tTIMEST" +
+      "AMP\020\002*\326\003\n\016ColumnDataType\022\013\n\007BOOLEAN\020\000\022\010\n" +
+      "\004INT8\020\001\022\t\n\005INT16\020\002\022\t\n\005INT32\020\003\022\t\n\005INT64\020\004" +
+      "\022\t\n\005UINT8\020\005\022\n\n\006UINT16\020\006\022\n\n\006UINT32\020\007\022\n\n\006U" +
+      "INT64\020\010\022\013\n\007FLOAT32\020\t\022\013\n\007FLOAT64\020\n\022\n\n\006BIN" +
+      "ARY\020\013\022\n\n\006STRING\020\014\022\010\n\004DATE\020\r\022\014\n\010DATETIME\020" +
+      "\016\022\024\n\020TIMESTAMP_SECOND\020\017\022\031\n\025TIMESTAMP_MIL" +
+      "LISECOND\020\020\022\031\n\025TIMESTAMP_MICROSECOND\020\021\022\030\n" +
+      "\024TIMESTAMP_NANOSECOND\020\022\022\017\n\013TIME_SECOND\020\023" +
+      "\022\024\n\020TIME_MILLISECOND\020\024\022\024\n\020TIME_MICROSECO" +
+      "ND\020\025\022\023\n\017TIME_NANOSECOND\020\026\022\027\n\023INTERVAL_YE" +
+      "AR_MONTH\020\027\022\025\n\021INTERVAL_DAY_TIME\020\030\022\033\n\027INT" +
+      "ERVAL_MONTH_DAY_NANO\020\031\022\016\n\nDECIMAL128\020\036BO" +
+      "\n\016io.greptime.v1B\006CommonZ5github.com/Gre" +
+      "ptimeTeam/greptime-proto/go/greptime/v1b" +
+      "\006proto3"
     };
     descriptor = com.google.protobuf.Descriptors.FileDescriptor
       .internalBuildGeneratedFileFrom(descriptorData,
@@ -12404,32 +12901,38 @@ public io.greptime.v1.Common.DecimalTypeExtension getDefaultInstanceForType() {
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_Metrics_descriptor,
         new java.lang.String[] { "Metrics", });
-    internal_static_greptime_v1_FlightMetadata_descriptor =
+    internal_static_greptime_v1_ExpireAfter_descriptor =
       getDescriptor().getMessageTypes().get(10);
+    internal_static_greptime_v1_ExpireAfter_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+        internal_static_greptime_v1_ExpireAfter_descriptor,
+        new java.lang.String[] { "Value", });
+    internal_static_greptime_v1_FlightMetadata_descriptor =
+      getDescriptor().getMessageTypes().get(11);
     internal_static_greptime_v1_FlightMetadata_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_FlightMetadata_descriptor,
         new java.lang.String[] { "AffectedRows", "Metrics", });
     internal_static_greptime_v1_IntervalMonthDayNano_descriptor =
-      getDescriptor().getMessageTypes().get(11);
+      getDescriptor().getMessageTypes().get(12);
     internal_static_greptime_v1_IntervalMonthDayNano_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_IntervalMonthDayNano_descriptor,
         new java.lang.String[] { "Months", "Days", "Nanoseconds", });
     internal_static_greptime_v1_Decimal128_descriptor =
-      getDescriptor().getMessageTypes().get(12);
+      getDescriptor().getMessageTypes().get(13);
     internal_static_greptime_v1_Decimal128_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_Decimal128_descriptor,
         new java.lang.String[] { "Hi", "Lo", });
     internal_static_greptime_v1_ColumnDataTypeExtension_descriptor =
-      getDescriptor().getMessageTypes().get(13);
+      getDescriptor().getMessageTypes().get(14);
     internal_static_greptime_v1_ColumnDataTypeExtension_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_ColumnDataTypeExtension_descriptor,
         new java.lang.String[] { "DecimalType", "TypeExt", });
     internal_static_greptime_v1_DecimalTypeExtension_descriptor =
-      getDescriptor().getMessageTypes().get(14);
+      getDescriptor().getMessageTypes().get(15);
     internal_static_greptime_v1_DecimalTypeExtension_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_DecimalTypeExtension_descriptor,
diff --git a/java/src/main/java/io/greptime/v1/Ddl.java b/java/src/main/java/io/greptime/v1/Ddl.java
index 8acd40ee..31ebf9ab 100644
--- a/java/src/main/java/io/greptime/v1/Ddl.java
+++ b/java/src/main/java/io/greptime/v1/Ddl.java
@@ -2669,16 +2669,31 @@ io.greptime.v1.Common.TableNameOrBuilder getSourceTableNamesOrBuilder(
     boolean getCreateIfNotExists();
 
     /**
-     * <code>string expire_when = 7;</code>
-     * @return The expireWhen.
+     * <pre>
+     * Expire data older than the given duration seconds.
+     * </pre>
+     *
+     * <code>.greptime.v1.ExpireAfter expire_after = 7;</code>
+     * @return Whether the expireAfter field is set.
      */
-    java.lang.String getExpireWhen();
+    boolean hasExpireAfter();
     /**
-     * <code>string expire_when = 7;</code>
-     * @return The bytes for expireWhen.
+     * <pre>
+     * Expire data older than the given duration seconds.
+     * </pre>
+     *
+     * <code>.greptime.v1.ExpireAfter expire_after = 7;</code>
+     * @return The expireAfter.
      */
-    com.google.protobuf.ByteString
-        getExpireWhenBytes();
+    io.greptime.v1.Common.ExpireAfter getExpireAfter();
+    /**
+     * <pre>
+     * Expire data older than the given duration seconds.
+     * </pre>
+     *
+     * <code>.greptime.v1.ExpireAfter expire_after = 7;</code>
+     */
+    io.greptime.v1.Common.ExpireAfterOrBuilder getExpireAfterOrBuilder();
 
     /**
      * <code>string comment = 8;</code>
@@ -2760,7 +2775,6 @@ private CreateFlowExpr() {
       catalogName_ = "";
       flowName_ = "";
       sourceTableNames_ = java.util.Collections.emptyList();
-      expireWhen_ = "";
       comment_ = "";
       sql_ = "";
     }
@@ -2841,9 +2855,16 @@ private CreateFlowExpr(
               break;
             }
             case 58: {
-              java.lang.String s = input.readStringRequireUtf8();
+              io.greptime.v1.Common.ExpireAfter.Builder subBuilder = null;
+              if (expireAfter_ != null) {
+                subBuilder = expireAfter_.toBuilder();
+              }
+              expireAfter_ = input.readMessage(io.greptime.v1.Common.ExpireAfter.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(expireAfter_);
+                expireAfter_ = subBuilder.buildPartial();
+              }
 
-              expireWhen_ = s;
               break;
             }
             case 66: {
@@ -3084,42 +3105,42 @@ public boolean getCreateIfNotExists() {
       return createIfNotExists_;
     }
 
-    public static final int EXPIRE_WHEN_FIELD_NUMBER = 7;
-    private volatile java.lang.Object expireWhen_;
+    public static final int EXPIRE_AFTER_FIELD_NUMBER = 7;
+    private io.greptime.v1.Common.ExpireAfter expireAfter_;
     /**
-     * <code>string expire_when = 7;</code>
-     * @return The expireWhen.
+     * <pre>
+     * Expire data older than the given duration seconds.
+     * </pre>
+     *
+     * <code>.greptime.v1.ExpireAfter expire_after = 7;</code>
+     * @return Whether the expireAfter field is set.
      */
     @java.lang.Override
-    public java.lang.String getExpireWhen() {
-      java.lang.Object ref = expireWhen_;
-      if (ref instanceof java.lang.String) {
-        return (java.lang.String) ref;
-      } else {
-        com.google.protobuf.ByteString bs = 
-            (com.google.protobuf.ByteString) ref;
-        java.lang.String s = bs.toStringUtf8();
-        expireWhen_ = s;
-        return s;
-      }
+    public boolean hasExpireAfter() {
+      return expireAfter_ != null;
     }
     /**
-     * <code>string expire_when = 7;</code>
-     * @return The bytes for expireWhen.
+     * <pre>
+     * Expire data older than the given duration seconds.
+     * </pre>
+     *
+     * <code>.greptime.v1.ExpireAfter expire_after = 7;</code>
+     * @return The expireAfter.
      */
     @java.lang.Override
-    public com.google.protobuf.ByteString
-        getExpireWhenBytes() {
-      java.lang.Object ref = expireWhen_;
-      if (ref instanceof java.lang.String) {
-        com.google.protobuf.ByteString b = 
-            com.google.protobuf.ByteString.copyFromUtf8(
-                (java.lang.String) ref);
-        expireWhen_ = b;
-        return b;
-      } else {
-        return (com.google.protobuf.ByteString) ref;
-      }
+    public io.greptime.v1.Common.ExpireAfter getExpireAfter() {
+      return expireAfter_ == null ? io.greptime.v1.Common.ExpireAfter.getDefaultInstance() : expireAfter_;
+    }
+    /**
+     * <pre>
+     * Expire data older than the given duration seconds.
+     * </pre>
+     *
+     * <code>.greptime.v1.ExpireAfter expire_after = 7;</code>
+     */
+    @java.lang.Override
+    public io.greptime.v1.Common.ExpireAfterOrBuilder getExpireAfterOrBuilder() {
+      return getExpireAfter();
     }
 
     public static final int COMMENT_FIELD_NUMBER = 8;
@@ -3311,8 +3332,8 @@ public void writeTo(com.google.protobuf.CodedOutputStream output)
       if (createIfNotExists_ != false) {
         output.writeBool(6, createIfNotExists_);
       }
-      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(expireWhen_)) {
-        com.google.protobuf.GeneratedMessageV3.writeString(output, 7, expireWhen_);
+      if (expireAfter_ != null) {
+        output.writeMessage(7, getExpireAfter());
       }
       if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(comment_)) {
         com.google.protobuf.GeneratedMessageV3.writeString(output, 8, comment_);
@@ -3357,8 +3378,9 @@ public int getSerializedSize() {
         size += com.google.protobuf.CodedOutputStream
           .computeBoolSize(6, createIfNotExists_);
       }
-      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(expireWhen_)) {
-        size += com.google.protobuf.GeneratedMessageV3.computeStringSize(7, expireWhen_);
+      if (expireAfter_ != null) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeMessageSize(7, getExpireAfter());
       }
       if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(comment_)) {
         size += com.google.protobuf.GeneratedMessageV3.computeStringSize(8, comment_);
@@ -3406,8 +3428,11 @@ public boolean equals(final java.lang.Object obj) {
           != other.getOrReplace()) return false;
       if (getCreateIfNotExists()
           != other.getCreateIfNotExists()) return false;
-      if (!getExpireWhen()
-          .equals(other.getExpireWhen())) return false;
+      if (hasExpireAfter() != other.hasExpireAfter()) return false;
+      if (hasExpireAfter()) {
+        if (!getExpireAfter()
+            .equals(other.getExpireAfter())) return false;
+      }
       if (!getComment()
           .equals(other.getComment())) return false;
       if (!getSql()
@@ -3443,8 +3468,10 @@ public int hashCode() {
       hash = (37 * hash) + CREATE_IF_NOT_EXISTS_FIELD_NUMBER;
       hash = (53 * hash) + com.google.protobuf.Internal.hashBoolean(
           getCreateIfNotExists());
-      hash = (37 * hash) + EXPIRE_WHEN_FIELD_NUMBER;
-      hash = (53 * hash) + getExpireWhen().hashCode();
+      if (hasExpireAfter()) {
+        hash = (37 * hash) + EXPIRE_AFTER_FIELD_NUMBER;
+        hash = (53 * hash) + getExpireAfter().hashCode();
+      }
       hash = (37 * hash) + COMMENT_FIELD_NUMBER;
       hash = (53 * hash) + getComment().hashCode();
       hash = (37 * hash) + SQL_FIELD_NUMBER;
@@ -3633,8 +3660,12 @@ public Builder clear() {
 
         createIfNotExists_ = false;
 
-        expireWhen_ = "";
-
+        if (expireAfterBuilder_ == null) {
+          expireAfter_ = null;
+        } else {
+          expireAfter_ = null;
+          expireAfterBuilder_ = null;
+        }
         comment_ = "";
 
         sql_ = "";
@@ -3685,7 +3716,11 @@ public io.greptime.v1.Ddl.CreateFlowExpr buildPartial() {
         }
         result.orReplace_ = orReplace_;
         result.createIfNotExists_ = createIfNotExists_;
-        result.expireWhen_ = expireWhen_;
+        if (expireAfterBuilder_ == null) {
+          result.expireAfter_ = expireAfter_;
+        } else {
+          result.expireAfter_ = expireAfterBuilder_.build();
+        }
         result.comment_ = comment_;
         result.sql_ = sql_;
         result.flowOptions_ = internalGetFlowOptions();
@@ -3781,9 +3816,8 @@ public Builder mergeFrom(io.greptime.v1.Ddl.CreateFlowExpr other) {
         if (other.getCreateIfNotExists() != false) {
           setCreateIfNotExists(other.getCreateIfNotExists());
         }
-        if (!other.getExpireWhen().isEmpty()) {
-          expireWhen_ = other.expireWhen_;
-          onChanged();
+        if (other.hasExpireAfter()) {
+          mergeExpireAfter(other.getExpireAfter());
         }
         if (!other.getComment().isEmpty()) {
           comment_ = other.comment_;
@@ -4398,80 +4432,159 @@ public Builder clearCreateIfNotExists() {
         return this;
       }
 
-      private java.lang.Object expireWhen_ = "";
+      private io.greptime.v1.Common.ExpireAfter expireAfter_;
+      private com.google.protobuf.SingleFieldBuilderV3<
+          io.greptime.v1.Common.ExpireAfter, io.greptime.v1.Common.ExpireAfter.Builder, io.greptime.v1.Common.ExpireAfterOrBuilder> expireAfterBuilder_;
+      /**
+       * <pre>
+       * Expire data older than the given duration seconds.
+       * </pre>
+       *
+       * <code>.greptime.v1.ExpireAfter expire_after = 7;</code>
+       * @return Whether the expireAfter field is set.
+       */
+      public boolean hasExpireAfter() {
+        return expireAfterBuilder_ != null || expireAfter_ != null;
+      }
       /**
-       * <code>string expire_when = 7;</code>
-       * @return The expireWhen.
+       * <pre>
+       * Expire data older than the given duration seconds.
+       * </pre>
+       *
+       * <code>.greptime.v1.ExpireAfter expire_after = 7;</code>
+       * @return The expireAfter.
        */
-      public java.lang.String getExpireWhen() {
-        java.lang.Object ref = expireWhen_;
-        if (!(ref instanceof java.lang.String)) {
-          com.google.protobuf.ByteString bs =
-              (com.google.protobuf.ByteString) ref;
-          java.lang.String s = bs.toStringUtf8();
-          expireWhen_ = s;
-          return s;
+      public io.greptime.v1.Common.ExpireAfter getExpireAfter() {
+        if (expireAfterBuilder_ == null) {
+          return expireAfter_ == null ? io.greptime.v1.Common.ExpireAfter.getDefaultInstance() : expireAfter_;
         } else {
-          return (java.lang.String) ref;
+          return expireAfterBuilder_.getMessage();
         }
       }
       /**
-       * <code>string expire_when = 7;</code>
-       * @return The bytes for expireWhen.
+       * <pre>
+       * Expire data older than the given duration seconds.
+       * </pre>
+       *
+       * <code>.greptime.v1.ExpireAfter expire_after = 7;</code>
        */
-      public com.google.protobuf.ByteString
-          getExpireWhenBytes() {
-        java.lang.Object ref = expireWhen_;
-        if (ref instanceof String) {
-          com.google.protobuf.ByteString b = 
-              com.google.protobuf.ByteString.copyFromUtf8(
-                  (java.lang.String) ref);
-          expireWhen_ = b;
-          return b;
+      public Builder setExpireAfter(io.greptime.v1.Common.ExpireAfter value) {
+        if (expireAfterBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          expireAfter_ = value;
+          onChanged();
         } else {
-          return (com.google.protobuf.ByteString) ref;
+          expireAfterBuilder_.setMessage(value);
         }
+
+        return this;
       }
       /**
-       * <code>string expire_when = 7;</code>
-       * @param value The expireWhen to set.
-       * @return This builder for chaining.
+       * <pre>
+       * Expire data older than the given duration seconds.
+       * </pre>
+       *
+       * <code>.greptime.v1.ExpireAfter expire_after = 7;</code>
        */
-      public Builder setExpireWhen(
-          java.lang.String value) {
-        if (value == null) {
-    throw new NullPointerException();
-  }
-  
-        expireWhen_ = value;
-        onChanged();
+      public Builder setExpireAfter(
+          io.greptime.v1.Common.ExpireAfter.Builder builderForValue) {
+        if (expireAfterBuilder_ == null) {
+          expireAfter_ = builderForValue.build();
+          onChanged();
+        } else {
+          expireAfterBuilder_.setMessage(builderForValue.build());
+        }
+
         return this;
       }
       /**
-       * <code>string expire_when = 7;</code>
-       * @return This builder for chaining.
+       * <pre>
+       * Expire data older than the given duration seconds.
+       * </pre>
+       *
+       * <code>.greptime.v1.ExpireAfter expire_after = 7;</code>
        */
-      public Builder clearExpireWhen() {
-        
-        expireWhen_ = getDefaultInstance().getExpireWhen();
-        onChanged();
+      public Builder mergeExpireAfter(io.greptime.v1.Common.ExpireAfter value) {
+        if (expireAfterBuilder_ == null) {
+          if (expireAfter_ != null) {
+            expireAfter_ =
+              io.greptime.v1.Common.ExpireAfter.newBuilder(expireAfter_).mergeFrom(value).buildPartial();
+          } else {
+            expireAfter_ = value;
+          }
+          onChanged();
+        } else {
+          expireAfterBuilder_.mergeFrom(value);
+        }
+
         return this;
       }
       /**
-       * <code>string expire_when = 7;</code>
-       * @param value The bytes for expireWhen to set.
-       * @return This builder for chaining.
+       * <pre>
+       * Expire data older than the given duration seconds.
+       * </pre>
+       *
+       * <code>.greptime.v1.ExpireAfter expire_after = 7;</code>
        */
-      public Builder setExpireWhenBytes(
-          com.google.protobuf.ByteString value) {
-        if (value == null) {
-    throw new NullPointerException();
-  }
-  checkByteStringIsUtf8(value);
+      public Builder clearExpireAfter() {
+        if (expireAfterBuilder_ == null) {
+          expireAfter_ = null;
+          onChanged();
+        } else {
+          expireAfter_ = null;
+          expireAfterBuilder_ = null;
+        }
+
+        return this;
+      }
+      /**
+       * <pre>
+       * Expire data older than the given duration seconds.
+       * </pre>
+       *
+       * <code>.greptime.v1.ExpireAfter expire_after = 7;</code>
+       */
+      public io.greptime.v1.Common.ExpireAfter.Builder getExpireAfterBuilder() {
         
-        expireWhen_ = value;
         onChanged();
-        return this;
+        return getExpireAfterFieldBuilder().getBuilder();
+      }
+      /**
+       * <pre>
+       * Expire data older than the given duration seconds.
+       * </pre>
+       *
+       * <code>.greptime.v1.ExpireAfter expire_after = 7;</code>
+       */
+      public io.greptime.v1.Common.ExpireAfterOrBuilder getExpireAfterOrBuilder() {
+        if (expireAfterBuilder_ != null) {
+          return expireAfterBuilder_.getMessageOrBuilder();
+        } else {
+          return expireAfter_ == null ?
+              io.greptime.v1.Common.ExpireAfter.getDefaultInstance() : expireAfter_;
+        }
+      }
+      /**
+       * <pre>
+       * Expire data older than the given duration seconds.
+       * </pre>
+       *
+       * <code>.greptime.v1.ExpireAfter expire_after = 7;</code>
+       */
+      private com.google.protobuf.SingleFieldBuilderV3<
+          io.greptime.v1.Common.ExpireAfter, io.greptime.v1.Common.ExpireAfter.Builder, io.greptime.v1.Common.ExpireAfterOrBuilder> 
+          getExpireAfterFieldBuilder() {
+        if (expireAfterBuilder_ == null) {
+          expireAfterBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
+              io.greptime.v1.Common.ExpireAfter, io.greptime.v1.Common.ExpireAfter.Builder, io.greptime.v1.Common.ExpireAfterOrBuilder>(
+                  getExpireAfter(),
+                  getParentForChildren(),
+                  isClean());
+          expireAfter_ = null;
+        }
+        return expireAfterBuilder_;
       }
 
       private java.lang.Object comment_ = "";
@@ -25035,85 +25148,86 @@ public io.greptime.v1.Ddl.AddColumnLocation getDefaultInstanceForType() {
       "_flow\030\t \001(\0132\031.greptime.v1.DropFlowExprH\000" +
       "\0222\n\013create_view\030\n \001(\0132\033.greptime.v1.Crea" +
       "teViewExprH\000\022.\n\tdrop_view\030\013 \001(\0132\031.grepti" +
-      "me.v1.DropViewExprH\000B\006\n\004expr\"\373\002\n\016CreateF" +
+      "me.v1.DropViewExprH\000B\006\n\004expr\"\226\003\n\016CreateF" +
       "lowExpr\022\024\n\014catalog_name\030\001 \001(\t\022\021\n\tflow_na" +
       "me\030\002 \001(\t\0222\n\022source_table_names\030\003 \003(\0132\026.g" +
       "reptime.v1.TableName\022/\n\017sink_table_name\030" +
       "\004 \001(\0132\026.greptime.v1.TableName\022\022\n\nor_repl" +
       "ace\030\005 \001(\010\022\034\n\024create_if_not_exists\030\006 \001(\010\022" +
-      "\023\n\013expire_when\030\007 \001(\t\022\017\n\007comment\030\010 \001(\t\022\013\n" +
-      "\003sql\030\t \001(\t\022B\n\014flow_options\030\n \003(\0132,.grept" +
-      "ime.v1.CreateFlowExpr.FlowOptionsEntry\0322" +
-      "\n\020FlowOptionsEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value" +
-      "\030\002 \001(\t:\0028\001\"u\n\014DropFlowExpr\022\024\n\014catalog_na" +
-      "me\030\001 \001(\t\022\021\n\tflow_name\030\002 \001(\t\022$\n\007flow_id\030\003" +
-      " \001(\0132\023.greptime.v1.FlowId\022\026\n\016drop_if_exi" +
-      "sts\030\005 \001(\010\"\226\001\n\016CreateViewExpr\022\024\n\014catalog_" +
-      "name\030\001 \001(\t\022\023\n\013schema_name\030\002 \001(\t\022\021\n\tview_" +
-      "name\030\003 \001(\t\022\024\n\014logical_plan\030\004 \001(\014\022\034\n\024crea" +
-      "te_if_not_exists\030\005 \001(\010\022\022\n\nor_replace\030\006 \001" +
-      "(\010\"\213\001\n\014DropViewExpr\022\024\n\014catalog_name\030\001 \001(" +
-      "\t\022\023\n\013schema_name\030\002 \001(\t\022\021\n\tview_name\030\003 \001(" +
-      "\t\022%\n\007view_id\030\004 \001(\0132\024.greptime.v1.TableId" +
-      "\022\026\n\016drop_if_exists\030\005 \001(\010\"\207\003\n\017CreateTable" +
-      "Expr\022\024\n\014catalog_name\030\001 \001(\t\022\023\n\013schema_nam" +
-      "e\030\002 \001(\t\022\022\n\ntable_name\030\003 \001(\t\022\014\n\004desc\030\004 \001(" +
-      "\t\022+\n\013column_defs\030\005 \003(\0132\026.greptime.v1.Col" +
-      "umnDef\022\022\n\ntime_index\030\006 \001(\t\022\024\n\014primary_ke" +
-      "ys\030\007 \003(\t\022\034\n\024create_if_not_exists\030\010 \001(\010\022E" +
-      "\n\rtable_options\030\t \003(\0132..greptime.v1.Crea" +
-      "teTableExpr.TableOptionsEntry\022&\n\010table_i" +
-      "d\030\n \001(\0132\024.greptime.v1.TableId\022\016\n\006engine\030" +
-      "\014 \001(\t\0323\n\021TableOptionsEntry\022\013\n\003key\030\001 \001(\t\022" +
-      "\r\n\005value\030\002 \001(\t:\0028\001\"\245\002\n\tAlterExpr\022\024\n\014cata" +
-      "log_name\030\001 \001(\t\022\023\n\013schema_name\030\002 \001(\t\022\022\n\nt" +
-      "able_name\030\003 \001(\t\022.\n\013add_columns\030\004 \001(\0132\027.g" +
-      "reptime.v1.AddColumnsH\000\0220\n\014drop_columns\030" +
-      "\005 \001(\0132\030.greptime.v1.DropColumnsH\000\0220\n\014ren" +
-      "ame_table\030\006 \001(\0132\030.greptime.v1.RenameTabl" +
-      "eH\000\022=\n\023change_column_types\030\007 \001(\0132\036.grept" +
-      "ime.v1.ChangeColumnTypesH\000B\006\n\004kind\"\216\001\n\rD" +
-      "ropTableExpr\022\024\n\014catalog_name\030\001 \001(\t\022\023\n\013sc" +
-      "hema_name\030\002 \001(\t\022\022\n\ntable_name\030\003 \001(\t\022&\n\010t" +
-      "able_id\030\004 \001(\0132\024.greptime.v1.TableId\022\026\n\016d" +
-      "rop_if_exists\030\005 \001(\010\"\314\001\n\022CreateDatabaseEx" +
-      "pr\022\024\n\014catalog_name\030\001 \001(\t\022\023\n\013schema_name\030" +
-      "\002 \001(\t\022\034\n\024create_if_not_exists\030\003 \001(\010\022=\n\007o" +
-      "ptions\030\004 \003(\0132,.greptime.v1.CreateDatabas" +
-      "eExpr.OptionsEntry\032.\n\014OptionsEntry\022\013\n\003ke" +
-      "y\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"z\n\021TruncateTa" +
-      "bleExpr\022\024\n\014catalog_name\030\001 \001(\t\022\023\n\013schema_" +
-      "name\030\002 \001(\t\022\022\n\ntable_name\030\003 \001(\t\022&\n\010table_" +
-      "id\030\004 \001(\0132\024.greptime.v1.TableId\"U\n\020DropDa" +
-      "tabaseExpr\022\024\n\014catalog_name\030\001 \001(\t\022\023\n\013sche" +
-      "ma_name\030\002 \001(\t\022\026\n\016drop_if_exists\030\003 \001(\010\"9\n" +
-      "\nAddColumns\022+\n\013add_columns\030\001 \003(\0132\026.grept" +
-      "ime.v1.AddColumn\"<\n\013DropColumns\022-\n\014drop_" +
-      "columns\030\001 \003(\0132\027.greptime.v1.DropColumn\"O" +
-      "\n\021ChangeColumnTypes\022:\n\023change_column_typ" +
-      "es\030\001 \003(\0132\035.greptime.v1.ChangeColumnType\"" +
-      "%\n\013RenameTable\022\026\n\016new_table_name\030\001 \001(\t\"i" +
-      "\n\tAddColumn\022*\n\ncolumn_def\030\001 \001(\0132\026.grepti" +
-      "me.v1.ColumnDef\0220\n\010location\030\003 \001(\0132\036.grep" +
-      "time.v1.AddColumnLocation\"\236\001\n\020ChangeColu" +
-      "mnType\022\023\n\013column_name\030\001 \001(\t\0220\n\013target_ty" +
-      "pe\030\002 \001(\0162\033.greptime.v1.ColumnDataType\022C\n" +
-      "\025target_type_extension\030\003 \001(\0132$.greptime." +
-      "v1.ColumnDataTypeExtension\"\032\n\nDropColumn" +
-      "\022\014\n\004name\030\001 \001(\t\"\025\n\007TableId\022\n\n\002id\030\001 \001(\r\"\024\n" +
-      "\006FlowId\022\n\n\002id\030\001 \001(\r\"\377\001\n\tColumnDef\022\014\n\004nam" +
-      "e\030\001 \001(\t\022.\n\tdata_type\030\002 \001(\0162\033.greptime.v1" +
-      ".ColumnDataType\022\023\n\013is_nullable\030\003 \001(\010\022\032\n\022" +
-      "default_constraint\030\004 \001(\014\0220\n\rsemantic_typ" +
-      "e\030\005 \001(\0162\031.greptime.v1.SemanticType\022\017\n\007co" +
-      "mment\030\006 \001(\t\022@\n\022datatype_extension\030\007 \001(\0132" +
-      "$.greptime.v1.ColumnDataTypeExtension\"\230\001" +
-      "\n\021AddColumnLocation\022B\n\rlocation_type\030\001 \001" +
-      "(\0162+.greptime.v1.AddColumnLocation.Locat" +
-      "ionType\022\031\n\021after_column_name\030\002 \001(\t\"$\n\014Lo" +
-      "cationType\022\t\n\005FIRST\020\000\022\t\n\005AFTER\020\001BL\n\016io.g" +
-      "reptime.v1B\003DdlZ5github.com/GreptimeTeam" +
-      "/greptime-proto/go/greptime/v1b\006proto3"
+      ".\n\014expire_after\030\007 \001(\0132\030.greptime.v1.Expi" +
+      "reAfter\022\017\n\007comment\030\010 \001(\t\022\013\n\003sql\030\t \001(\t\022B\n" +
+      "\014flow_options\030\n \003(\0132,.greptime.v1.Create" +
+      "FlowExpr.FlowOptionsEntry\0322\n\020FlowOptions" +
+      "Entry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"u\n" +
+      "\014DropFlowExpr\022\024\n\014catalog_name\030\001 \001(\t\022\021\n\tf" +
+      "low_name\030\002 \001(\t\022$\n\007flow_id\030\003 \001(\0132\023.grepti" +
+      "me.v1.FlowId\022\026\n\016drop_if_exists\030\005 \001(\010\"\226\001\n" +
+      "\016CreateViewExpr\022\024\n\014catalog_name\030\001 \001(\t\022\023\n" +
+      "\013schema_name\030\002 \001(\t\022\021\n\tview_name\030\003 \001(\t\022\024\n" +
+      "\014logical_plan\030\004 \001(\014\022\034\n\024create_if_not_exi" +
+      "sts\030\005 \001(\010\022\022\n\nor_replace\030\006 \001(\010\"\213\001\n\014DropVi" +
+      "ewExpr\022\024\n\014catalog_name\030\001 \001(\t\022\023\n\013schema_n" +
+      "ame\030\002 \001(\t\022\021\n\tview_name\030\003 \001(\t\022%\n\007view_id\030" +
+      "\004 \001(\0132\024.greptime.v1.TableId\022\026\n\016drop_if_e" +
+      "xists\030\005 \001(\010\"\207\003\n\017CreateTableExpr\022\024\n\014catal" +
+      "og_name\030\001 \001(\t\022\023\n\013schema_name\030\002 \001(\t\022\022\n\nta" +
+      "ble_name\030\003 \001(\t\022\014\n\004desc\030\004 \001(\t\022+\n\013column_d" +
+      "efs\030\005 \003(\0132\026.greptime.v1.ColumnDef\022\022\n\ntim" +
+      "e_index\030\006 \001(\t\022\024\n\014primary_keys\030\007 \003(\t\022\034\n\024c" +
+      "reate_if_not_exists\030\010 \001(\010\022E\n\rtable_optio" +
+      "ns\030\t \003(\0132..greptime.v1.CreateTableExpr.T" +
+      "ableOptionsEntry\022&\n\010table_id\030\n \001(\0132\024.gre" +
+      "ptime.v1.TableId\022\016\n\006engine\030\014 \001(\t\0323\n\021Tabl" +
+      "eOptionsEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(" +
+      "\t:\0028\001\"\245\002\n\tAlterExpr\022\024\n\014catalog_name\030\001 \001(" +
+      "\t\022\023\n\013schema_name\030\002 \001(\t\022\022\n\ntable_name\030\003 \001" +
+      "(\t\022.\n\013add_columns\030\004 \001(\0132\027.greptime.v1.Ad" +
+      "dColumnsH\000\0220\n\014drop_columns\030\005 \001(\0132\030.grept" +
+      "ime.v1.DropColumnsH\000\0220\n\014rename_table\030\006 \001" +
+      "(\0132\030.greptime.v1.RenameTableH\000\022=\n\023change" +
+      "_column_types\030\007 \001(\0132\036.greptime.v1.Change" +
+      "ColumnTypesH\000B\006\n\004kind\"\216\001\n\rDropTableExpr\022" +
+      "\024\n\014catalog_name\030\001 \001(\t\022\023\n\013schema_name\030\002 \001" +
+      "(\t\022\022\n\ntable_name\030\003 \001(\t\022&\n\010table_id\030\004 \001(\013" +
+      "2\024.greptime.v1.TableId\022\026\n\016drop_if_exists" +
+      "\030\005 \001(\010\"\314\001\n\022CreateDatabaseExpr\022\024\n\014catalog" +
+      "_name\030\001 \001(\t\022\023\n\013schema_name\030\002 \001(\t\022\034\n\024crea" +
+      "te_if_not_exists\030\003 \001(\010\022=\n\007options\030\004 \003(\0132" +
+      ",.greptime.v1.CreateDatabaseExpr.Options" +
+      "Entry\032.\n\014OptionsEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005va" +
+      "lue\030\002 \001(\t:\0028\001\"z\n\021TruncateTableExpr\022\024\n\014ca" +
+      "talog_name\030\001 \001(\t\022\023\n\013schema_name\030\002 \001(\t\022\022\n" +
+      "\ntable_name\030\003 \001(\t\022&\n\010table_id\030\004 \001(\0132\024.gr" +
+      "eptime.v1.TableId\"U\n\020DropDatabaseExpr\022\024\n" +
+      "\014catalog_name\030\001 \001(\t\022\023\n\013schema_name\030\002 \001(\t" +
+      "\022\026\n\016drop_if_exists\030\003 \001(\010\"9\n\nAddColumns\022+" +
+      "\n\013add_columns\030\001 \003(\0132\026.greptime.v1.AddCol" +
+      "umn\"<\n\013DropColumns\022-\n\014drop_columns\030\001 \003(\013" +
+      "2\027.greptime.v1.DropColumn\"O\n\021ChangeColum" +
+      "nTypes\022:\n\023change_column_types\030\001 \003(\0132\035.gr" +
+      "eptime.v1.ChangeColumnType\"%\n\013RenameTabl" +
+      "e\022\026\n\016new_table_name\030\001 \001(\t\"i\n\tAddColumn\022*" +
+      "\n\ncolumn_def\030\001 \001(\0132\026.greptime.v1.ColumnD" +
+      "ef\0220\n\010location\030\003 \001(\0132\036.greptime.v1.AddCo" +
+      "lumnLocation\"\236\001\n\020ChangeColumnType\022\023\n\013col" +
+      "umn_name\030\001 \001(\t\0220\n\013target_type\030\002 \001(\0162\033.gr" +
+      "eptime.v1.ColumnDataType\022C\n\025target_type_" +
+      "extension\030\003 \001(\0132$.greptime.v1.ColumnData" +
+      "TypeExtension\"\032\n\nDropColumn\022\014\n\004name\030\001 \001(" +
+      "\t\"\025\n\007TableId\022\n\n\002id\030\001 \001(\r\"\024\n\006FlowId\022\n\n\002id" +
+      "\030\001 \001(\r\"\377\001\n\tColumnDef\022\014\n\004name\030\001 \001(\t\022.\n\tda" +
+      "ta_type\030\002 \001(\0162\033.greptime.v1.ColumnDataTy" +
+      "pe\022\023\n\013is_nullable\030\003 \001(\010\022\032\n\022default_const" +
+      "raint\030\004 \001(\014\0220\n\rsemantic_type\030\005 \001(\0162\031.gre" +
+      "ptime.v1.SemanticType\022\017\n\007comment\030\006 \001(\t\022@" +
+      "\n\022datatype_extension\030\007 \001(\0132$.greptime.v1" +
+      ".ColumnDataTypeExtension\"\230\001\n\021AddColumnLo" +
+      "cation\022B\n\rlocation_type\030\001 \001(\0162+.greptime" +
+      ".v1.AddColumnLocation.LocationType\022\031\n\021af" +
+      "ter_column_name\030\002 \001(\t\"$\n\014LocationType\022\t\n" +
+      "\005FIRST\020\000\022\t\n\005AFTER\020\001BL\n\016io.greptime.v1B\003D" +
+      "dlZ5github.com/GreptimeTeam/greptime-pro" +
+      "to/go/greptime/v1b\006proto3"
     };
     descriptor = com.google.protobuf.Descriptors.FileDescriptor
       .internalBuildGeneratedFileFrom(descriptorData,
@@ -25131,7 +25245,7 @@ public io.greptime.v1.Ddl.AddColumnLocation getDefaultInstanceForType() {
     internal_static_greptime_v1_CreateFlowExpr_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_CreateFlowExpr_descriptor,
-        new java.lang.String[] { "CatalogName", "FlowName", "SourceTableNames", "SinkTableName", "OrReplace", "CreateIfNotExists", "ExpireWhen", "Comment", "Sql", "FlowOptions", });
+        new java.lang.String[] { "CatalogName", "FlowName", "SourceTableNames", "SinkTableName", "OrReplace", "CreateIfNotExists", "ExpireAfter", "Comment", "Sql", "FlowOptions", });
     internal_static_greptime_v1_CreateFlowExpr_FlowOptionsEntry_descriptor =
       internal_static_greptime_v1_CreateFlowExpr_descriptor.getNestedTypes().get(0);
     internal_static_greptime_v1_CreateFlowExpr_FlowOptionsEntry_fieldAccessorTable = new
diff --git a/java/src/main/java/io/greptime/v1/flow/Server.java b/java/src/main/java/io/greptime/v1/flow/Server.java
index 87749ef9..7588b785 100644
--- a/java/src/main/java/io/greptime/v1/flow/Server.java
+++ b/java/src/main/java/io/greptime/v1/flow/Server.java
@@ -5313,16 +5313,31 @@ io.greptime.v1.Ddl.TableIdOrBuilder getSourceTableIdsOrBuilder(
     boolean getCreateIfNotExists();
 
     /**
-     * <code>string expire_when = 5;</code>
-     * @return The expireWhen.
+     * <pre>
+     * Expire data older than the given duration seconds.
+     * </pre>
+     *
+     * <code>.greptime.v1.ExpireAfter expire_after = 5;</code>
+     * @return Whether the expireAfter field is set.
      */
-    java.lang.String getExpireWhen();
+    boolean hasExpireAfter();
     /**
-     * <code>string expire_when = 5;</code>
-     * @return The bytes for expireWhen.
+     * <pre>
+     * Expire data older than the given duration seconds.
+     * </pre>
+     *
+     * <code>.greptime.v1.ExpireAfter expire_after = 5;</code>
+     * @return The expireAfter.
      */
-    com.google.protobuf.ByteString
-        getExpireWhenBytes();
+    io.greptime.v1.Common.ExpireAfter getExpireAfter();
+    /**
+     * <pre>
+     * Expire data older than the given duration seconds.
+     * </pre>
+     *
+     * <code>.greptime.v1.ExpireAfter expire_after = 5;</code>
+     */
+    io.greptime.v1.Common.ExpireAfterOrBuilder getExpireAfterOrBuilder();
 
     /**
      * <code>string comment = 6;</code>
@@ -5387,8 +5402,7 @@ java.lang.String getFlowOptionsOrThrow(
   /**
    * <pre>
    * Create a flow
-   * 
-   * Very similar to `ddl.CreateTaskExpr`, 
+   * Very similar to `ddl.CreateTaskExpr`,
    * replace `source_table_names` with `source_table_ids`
    * </pre>
    *
@@ -5405,7 +5419,6 @@ private CreateRequest(com.google.protobuf.GeneratedMessageV3.Builder<?> builder)
     }
     private CreateRequest() {
       sourceTableIds_ = java.util.Collections.emptyList();
-      expireWhen_ = "";
       comment_ = "";
       sql_ = "";
     }
@@ -5482,9 +5495,16 @@ private CreateRequest(
               break;
             }
             case 42: {
-              java.lang.String s = input.readStringRequireUtf8();
+              io.greptime.v1.Common.ExpireAfter.Builder subBuilder = null;
+              if (expireAfter_ != null) {
+                subBuilder = expireAfter_.toBuilder();
+              }
+              expireAfter_ = input.readMessage(io.greptime.v1.Common.ExpireAfter.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(expireAfter_);
+                expireAfter_ = subBuilder.buildPartial();
+              }
 
-              expireWhen_ = s;
               break;
             }
             case 50: {
@@ -5664,42 +5684,42 @@ public boolean getCreateIfNotExists() {
       return createIfNotExists_;
     }
 
-    public static final int EXPIRE_WHEN_FIELD_NUMBER = 5;
-    private volatile java.lang.Object expireWhen_;
+    public static final int EXPIRE_AFTER_FIELD_NUMBER = 5;
+    private io.greptime.v1.Common.ExpireAfter expireAfter_;
     /**
-     * <code>string expire_when = 5;</code>
-     * @return The expireWhen.
+     * <pre>
+     * Expire data older than the given duration seconds.
+     * </pre>
+     *
+     * <code>.greptime.v1.ExpireAfter expire_after = 5;</code>
+     * @return Whether the expireAfter field is set.
      */
     @java.lang.Override
-    public java.lang.String getExpireWhen() {
-      java.lang.Object ref = expireWhen_;
-      if (ref instanceof java.lang.String) {
-        return (java.lang.String) ref;
-      } else {
-        com.google.protobuf.ByteString bs = 
-            (com.google.protobuf.ByteString) ref;
-        java.lang.String s = bs.toStringUtf8();
-        expireWhen_ = s;
-        return s;
-      }
+    public boolean hasExpireAfter() {
+      return expireAfter_ != null;
     }
     /**
-     * <code>string expire_when = 5;</code>
-     * @return The bytes for expireWhen.
+     * <pre>
+     * Expire data older than the given duration seconds.
+     * </pre>
+     *
+     * <code>.greptime.v1.ExpireAfter expire_after = 5;</code>
+     * @return The expireAfter.
      */
     @java.lang.Override
-    public com.google.protobuf.ByteString
-        getExpireWhenBytes() {
-      java.lang.Object ref = expireWhen_;
-      if (ref instanceof java.lang.String) {
-        com.google.protobuf.ByteString b = 
-            com.google.protobuf.ByteString.copyFromUtf8(
-                (java.lang.String) ref);
-        expireWhen_ = b;
-        return b;
-      } else {
-        return (com.google.protobuf.ByteString) ref;
-      }
+    public io.greptime.v1.Common.ExpireAfter getExpireAfter() {
+      return expireAfter_ == null ? io.greptime.v1.Common.ExpireAfter.getDefaultInstance() : expireAfter_;
+    }
+    /**
+     * <pre>
+     * Expire data older than the given duration seconds.
+     * </pre>
+     *
+     * <code>.greptime.v1.ExpireAfter expire_after = 5;</code>
+     */
+    @java.lang.Override
+    public io.greptime.v1.Common.ExpireAfterOrBuilder getExpireAfterOrBuilder() {
+      return getExpireAfter();
     }
 
     public static final int COMMENT_FIELD_NUMBER = 6;
@@ -5885,8 +5905,8 @@ public void writeTo(com.google.protobuf.CodedOutputStream output)
       if (createIfNotExists_ != false) {
         output.writeBool(4, createIfNotExists_);
       }
-      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(expireWhen_)) {
-        com.google.protobuf.GeneratedMessageV3.writeString(output, 5, expireWhen_);
+      if (expireAfter_ != null) {
+        output.writeMessage(5, getExpireAfter());
       }
       if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(comment_)) {
         com.google.protobuf.GeneratedMessageV3.writeString(output, 6, comment_);
@@ -5925,8 +5945,9 @@ public int getSerializedSize() {
         size += com.google.protobuf.CodedOutputStream
           .computeBoolSize(4, createIfNotExists_);
       }
-      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(expireWhen_)) {
-        size += com.google.protobuf.GeneratedMessageV3.computeStringSize(5, expireWhen_);
+      if (expireAfter_ != null) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeMessageSize(5, getExpireAfter());
       }
       if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(comment_)) {
         size += com.google.protobuf.GeneratedMessageV3.computeStringSize(6, comment_);
@@ -5973,8 +5994,11 @@ public boolean equals(final java.lang.Object obj) {
       }
       if (getCreateIfNotExists()
           != other.getCreateIfNotExists()) return false;
-      if (!getExpireWhen()
-          .equals(other.getExpireWhen())) return false;
+      if (hasExpireAfter() != other.hasExpireAfter()) return false;
+      if (hasExpireAfter()) {
+        if (!getExpireAfter()
+            .equals(other.getExpireAfter())) return false;
+      }
       if (!getComment()
           .equals(other.getComment())) return false;
       if (!getSql()
@@ -6007,8 +6031,10 @@ public int hashCode() {
       hash = (37 * hash) + CREATE_IF_NOT_EXISTS_FIELD_NUMBER;
       hash = (53 * hash) + com.google.protobuf.Internal.hashBoolean(
           getCreateIfNotExists());
-      hash = (37 * hash) + EXPIRE_WHEN_FIELD_NUMBER;
-      hash = (53 * hash) + getExpireWhen().hashCode();
+      if (hasExpireAfter()) {
+        hash = (37 * hash) + EXPIRE_AFTER_FIELD_NUMBER;
+        hash = (53 * hash) + getExpireAfter().hashCode();
+      }
       hash = (37 * hash) + COMMENT_FIELD_NUMBER;
       hash = (53 * hash) + getComment().hashCode();
       hash = (37 * hash) + SQL_FIELD_NUMBER;
@@ -6115,8 +6141,7 @@ protected Builder newBuilderForType(
     /**
      * <pre>
      * Create a flow
-     * 
-     * Very similar to `ddl.CreateTaskExpr`, 
+     * Very similar to `ddl.CreateTaskExpr`,
      * replace `source_table_names` with `source_table_ids`
      * </pre>
      *
@@ -6200,8 +6225,12 @@ public Builder clear() {
         }
         createIfNotExists_ = false;
 
-        expireWhen_ = "";
-
+        if (expireAfterBuilder_ == null) {
+          expireAfter_ = null;
+        } else {
+          expireAfter_ = null;
+          expireAfterBuilder_ = null;
+        }
         comment_ = "";
 
         sql_ = "";
@@ -6254,7 +6283,11 @@ public io.greptime.v1.flow.Server.CreateRequest buildPartial() {
           result.sinkTableName_ = sinkTableNameBuilder_.build();
         }
         result.createIfNotExists_ = createIfNotExists_;
-        result.expireWhen_ = expireWhen_;
+        if (expireAfterBuilder_ == null) {
+          result.expireAfter_ = expireAfter_;
+        } else {
+          result.expireAfter_ = expireAfterBuilder_.build();
+        }
         result.comment_ = comment_;
         result.sql_ = sql_;
         result.flowOptions_ = internalGetFlowOptions();
@@ -6342,9 +6375,8 @@ public Builder mergeFrom(io.greptime.v1.flow.Server.CreateRequest other) {
         if (other.getCreateIfNotExists() != false) {
           setCreateIfNotExists(other.getCreateIfNotExists());
         }
-        if (!other.getExpireWhen().isEmpty()) {
-          expireWhen_ = other.expireWhen_;
-          onChanged();
+        if (other.hasExpireAfter()) {
+          mergeExpireAfter(other.getExpireAfter());
         }
         if (!other.getComment().isEmpty()) {
           comment_ = other.comment_;
@@ -6895,80 +6927,159 @@ public Builder clearCreateIfNotExists() {
         return this;
       }
 
-      private java.lang.Object expireWhen_ = "";
+      private io.greptime.v1.Common.ExpireAfter expireAfter_;
+      private com.google.protobuf.SingleFieldBuilderV3<
+          io.greptime.v1.Common.ExpireAfter, io.greptime.v1.Common.ExpireAfter.Builder, io.greptime.v1.Common.ExpireAfterOrBuilder> expireAfterBuilder_;
+      /**
+       * <pre>
+       * Expire data older than the given duration seconds.
+       * </pre>
+       *
+       * <code>.greptime.v1.ExpireAfter expire_after = 5;</code>
+       * @return Whether the expireAfter field is set.
+       */
+      public boolean hasExpireAfter() {
+        return expireAfterBuilder_ != null || expireAfter_ != null;
+      }
       /**
-       * <code>string expire_when = 5;</code>
-       * @return The expireWhen.
+       * <pre>
+       * Expire data older than the given duration seconds.
+       * </pre>
+       *
+       * <code>.greptime.v1.ExpireAfter expire_after = 5;</code>
+       * @return The expireAfter.
        */
-      public java.lang.String getExpireWhen() {
-        java.lang.Object ref = expireWhen_;
-        if (!(ref instanceof java.lang.String)) {
-          com.google.protobuf.ByteString bs =
-              (com.google.protobuf.ByteString) ref;
-          java.lang.String s = bs.toStringUtf8();
-          expireWhen_ = s;
-          return s;
+      public io.greptime.v1.Common.ExpireAfter getExpireAfter() {
+        if (expireAfterBuilder_ == null) {
+          return expireAfter_ == null ? io.greptime.v1.Common.ExpireAfter.getDefaultInstance() : expireAfter_;
         } else {
-          return (java.lang.String) ref;
+          return expireAfterBuilder_.getMessage();
         }
       }
       /**
-       * <code>string expire_when = 5;</code>
-       * @return The bytes for expireWhen.
+       * <pre>
+       * Expire data older than the given duration seconds.
+       * </pre>
+       *
+       * <code>.greptime.v1.ExpireAfter expire_after = 5;</code>
        */
-      public com.google.protobuf.ByteString
-          getExpireWhenBytes() {
-        java.lang.Object ref = expireWhen_;
-        if (ref instanceof String) {
-          com.google.protobuf.ByteString b = 
-              com.google.protobuf.ByteString.copyFromUtf8(
-                  (java.lang.String) ref);
-          expireWhen_ = b;
-          return b;
+      public Builder setExpireAfter(io.greptime.v1.Common.ExpireAfter value) {
+        if (expireAfterBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          expireAfter_ = value;
+          onChanged();
         } else {
-          return (com.google.protobuf.ByteString) ref;
+          expireAfterBuilder_.setMessage(value);
         }
+
+        return this;
       }
       /**
-       * <code>string expire_when = 5;</code>
-       * @param value The expireWhen to set.
-       * @return This builder for chaining.
+       * <pre>
+       * Expire data older than the given duration seconds.
+       * </pre>
+       *
+       * <code>.greptime.v1.ExpireAfter expire_after = 5;</code>
        */
-      public Builder setExpireWhen(
-          java.lang.String value) {
-        if (value == null) {
-    throw new NullPointerException();
-  }
-  
-        expireWhen_ = value;
-        onChanged();
+      public Builder setExpireAfter(
+          io.greptime.v1.Common.ExpireAfter.Builder builderForValue) {
+        if (expireAfterBuilder_ == null) {
+          expireAfter_ = builderForValue.build();
+          onChanged();
+        } else {
+          expireAfterBuilder_.setMessage(builderForValue.build());
+        }
+
         return this;
       }
       /**
-       * <code>string expire_when = 5;</code>
-       * @return This builder for chaining.
+       * <pre>
+       * Expire data older than the given duration seconds.
+       * </pre>
+       *
+       * <code>.greptime.v1.ExpireAfter expire_after = 5;</code>
        */
-      public Builder clearExpireWhen() {
-        
-        expireWhen_ = getDefaultInstance().getExpireWhen();
-        onChanged();
+      public Builder mergeExpireAfter(io.greptime.v1.Common.ExpireAfter value) {
+        if (expireAfterBuilder_ == null) {
+          if (expireAfter_ != null) {
+            expireAfter_ =
+              io.greptime.v1.Common.ExpireAfter.newBuilder(expireAfter_).mergeFrom(value).buildPartial();
+          } else {
+            expireAfter_ = value;
+          }
+          onChanged();
+        } else {
+          expireAfterBuilder_.mergeFrom(value);
+        }
+
         return this;
       }
       /**
-       * <code>string expire_when = 5;</code>
-       * @param value The bytes for expireWhen to set.
-       * @return This builder for chaining.
+       * <pre>
+       * Expire data older than the given duration seconds.
+       * </pre>
+       *
+       * <code>.greptime.v1.ExpireAfter expire_after = 5;</code>
        */
-      public Builder setExpireWhenBytes(
-          com.google.protobuf.ByteString value) {
-        if (value == null) {
-    throw new NullPointerException();
-  }
-  checkByteStringIsUtf8(value);
+      public Builder clearExpireAfter() {
+        if (expireAfterBuilder_ == null) {
+          expireAfter_ = null;
+          onChanged();
+        } else {
+          expireAfter_ = null;
+          expireAfterBuilder_ = null;
+        }
+
+        return this;
+      }
+      /**
+       * <pre>
+       * Expire data older than the given duration seconds.
+       * </pre>
+       *
+       * <code>.greptime.v1.ExpireAfter expire_after = 5;</code>
+       */
+      public io.greptime.v1.Common.ExpireAfter.Builder getExpireAfterBuilder() {
         
-        expireWhen_ = value;
         onChanged();
-        return this;
+        return getExpireAfterFieldBuilder().getBuilder();
+      }
+      /**
+       * <pre>
+       * Expire data older than the given duration seconds.
+       * </pre>
+       *
+       * <code>.greptime.v1.ExpireAfter expire_after = 5;</code>
+       */
+      public io.greptime.v1.Common.ExpireAfterOrBuilder getExpireAfterOrBuilder() {
+        if (expireAfterBuilder_ != null) {
+          return expireAfterBuilder_.getMessageOrBuilder();
+        } else {
+          return expireAfter_ == null ?
+              io.greptime.v1.Common.ExpireAfter.getDefaultInstance() : expireAfter_;
+        }
+      }
+      /**
+       * <pre>
+       * Expire data older than the given duration seconds.
+       * </pre>
+       *
+       * <code>.greptime.v1.ExpireAfter expire_after = 5;</code>
+       */
+      private com.google.protobuf.SingleFieldBuilderV3<
+          io.greptime.v1.Common.ExpireAfter, io.greptime.v1.Common.ExpireAfter.Builder, io.greptime.v1.Common.ExpireAfterOrBuilder> 
+          getExpireAfterFieldBuilder() {
+        if (expireAfterBuilder_ == null) {
+          expireAfterBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
+              io.greptime.v1.Common.ExpireAfter, io.greptime.v1.Common.ExpireAfter.Builder, io.greptime.v1.Common.ExpireAfterOrBuilder>(
+                  getExpireAfter(),
+                  getParentForChildren(),
+                  isClean());
+          expireAfter_ = null;
+        }
+        return expireAfterBuilder_;
       }
 
       private java.lang.Object comment_ = "";
@@ -8010,24 +8121,25 @@ public io.greptime.v1.flow.Server.DropRequest getDefaultInstanceForType() {
       "ime.v1.FlowId\022@\n\textension\030\004 \003(\0132-.grept" +
       "ime.v1.flow.FlowResponse.ExtensionEntry\032" +
       "0\n\016ExtensionEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030" +
-      "\002 \001(\014:\0028\001\"\343\002\n\rCreateRequest\022$\n\007flow_id\030\001" +
+      "\002 \001(\014:\0028\001\"\376\002\n\rCreateRequest\022$\n\007flow_id\030\001" +
       " \001(\0132\023.greptime.v1.FlowId\022.\n\020source_tabl" +
       "e_ids\030\002 \003(\0132\024.greptime.v1.TableId\022/\n\017sin" +
       "k_table_name\030\003 \001(\0132\026.greptime.v1.TableNa" +
-      "me\022\034\n\024create_if_not_exists\030\004 \001(\010\022\023\n\013expi" +
-      "re_when\030\005 \001(\t\022\017\n\007comment\030\006 \001(\t\022\013\n\003sql\030\007 " +
-      "\001(\t\022F\n\014flow_options\030\010 \003(\01320.greptime.v1." +
-      "flow.CreateRequest.FlowOptionsEntry\0322\n\020F" +
-      "lowOptionsEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 " +
-      "\001(\t:\0028\001\"3\n\013DropRequest\022$\n\007flow_id\030\001 \001(\0132" +
-      "\023.greptime.v1.FlowId2\264\001\n\004Flow\022S\n\022HandleC" +
-      "reateRemove\022\035.greptime.v1.flow.FlowReque" +
-      "st\032\036.greptime.v1.flow.FlowResponse\022W\n\023Ha" +
-      "ndleMirrorRequest\022 .greptime.v1.flow.Ins" +
-      "ertRequests\032\036.greptime.v1.flow.FlowRespo" +
-      "nseBY\n\023io.greptime.v1.flowB\006ServerZ:gith" +
-      "ub.com/GreptimeTeam/greptime-proto/go/gr" +
-      "eptime/v1/flowb\006proto3"
+      "me\022\034\n\024create_if_not_exists\030\004 \001(\010\022.\n\014expi" +
+      "re_after\030\005 \001(\0132\030.greptime.v1.ExpireAfter" +
+      "\022\017\n\007comment\030\006 \001(\t\022\013\n\003sql\030\007 \001(\t\022F\n\014flow_o" +
+      "ptions\030\010 \003(\01320.greptime.v1.flow.CreateRe" +
+      "quest.FlowOptionsEntry\0322\n\020FlowOptionsEnt" +
+      "ry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"3\n\013Dr" +
+      "opRequest\022$\n\007flow_id\030\001 \001(\0132\023.greptime.v1" +
+      ".FlowId2\264\001\n\004Flow\022S\n\022HandleCreateRemove\022\035" +
+      ".greptime.v1.flow.FlowRequest\032\036.greptime" +
+      ".v1.flow.FlowResponse\022W\n\023HandleMirrorReq" +
+      "uest\022 .greptime.v1.flow.InsertRequests\032\036" +
+      ".greptime.v1.flow.FlowResponseBY\n\023io.gre" +
+      "ptime.v1.flowB\006ServerZ:github.com/Grepti" +
+      "meTeam/greptime-proto/go/greptime/v1/flo" +
+      "wb\006proto3"
     };
     descriptor = com.google.protobuf.Descriptors.FileDescriptor
       .internalBuildGeneratedFileFrom(descriptorData,
@@ -8083,7 +8195,7 @@ public io.greptime.v1.flow.Server.DropRequest getDefaultInstanceForType() {
     internal_static_greptime_v1_flow_CreateRequest_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_flow_CreateRequest_descriptor,
-        new java.lang.String[] { "FlowId", "SourceTableIds", "SinkTableName", "CreateIfNotExists", "ExpireWhen", "Comment", "Sql", "FlowOptions", });
+        new java.lang.String[] { "FlowId", "SourceTableIds", "SinkTableName", "CreateIfNotExists", "ExpireAfter", "Comment", "Sql", "FlowOptions", });
     internal_static_greptime_v1_flow_CreateRequest_FlowOptionsEntry_descriptor =
       internal_static_greptime_v1_flow_CreateRequest_descriptor.getNestedTypes().get(0);
     internal_static_greptime_v1_flow_CreateRequest_FlowOptionsEntry_fieldAccessorTable = new
diff --git a/proto/greptime/v1/common.proto b/proto/greptime/v1/common.proto
index cb029d84..5390fdbf 100644
--- a/proto/greptime/v1/common.proto
+++ b/proto/greptime/v1/common.proto
@@ -75,6 +75,8 @@ message AffectedRows { uint32 value = 1; }
 
 message Metrics { bytes metrics = 1; }
 
+message ExpireAfter { int64 value = 1; }
+
 message FlightMetadata {
   AffectedRows affected_rows = 1;
   Metrics metrics = 2;
diff --git a/proto/greptime/v1/ddl.proto b/proto/greptime/v1/ddl.proto
index 31d0eeea..a364ad65 100644
--- a/proto/greptime/v1/ddl.proto
+++ b/proto/greptime/v1/ddl.proto
@@ -48,7 +48,8 @@ message CreateFlowExpr {
   TableName sink_table_name = 4;
   bool or_replace = 5;
   bool create_if_not_exists = 6;
-  string expire_when = 7;
+  // Expire data older than the given duration seconds.
+  ExpireAfter expire_after = 7;
   string comment = 8;
   string sql = 9;
   map<string, string> flow_options = 10;
@@ -149,9 +150,9 @@ message AddColumn {
 }
 
 message ChangeColumnType {
-    string column_name = 1;
-    ColumnDataType target_type = 2;
-    ColumnDataTypeExtension target_type_extension = 3;
+  string column_name = 1;
+  ColumnDataType target_type = 2;
+  ColumnDataTypeExtension target_type_extension = 3;
 }
 
 message DropColumn { string name = 1; }
diff --git a/proto/greptime/v1/flow/server.proto b/proto/greptime/v1/flow/server.proto
index d4eb0967..7ac3a13b 100644
--- a/proto/greptime/v1/flow/server.proto
+++ b/proto/greptime/v1/flow/server.proto
@@ -65,19 +65,19 @@ message FlowResponse {
 }
 
 // Create a flow
-// 
-// Very similar to `ddl.CreateTaskExpr`, 
+//
+// Very similar to `ddl.CreateTaskExpr`,
 // replace `source_table_names` with `source_table_ids`
 message CreateRequest {
-  FlowId flow_id = 1; 
+  FlowId flow_id = 1;
   repeated TableId source_table_ids = 2;
   TableName sink_table_name = 3;
   bool create_if_not_exists = 4;
-  string expire_when = 5;
+  // Expire data older than the given duration seconds.
+  ExpireAfter expire_after = 5;
   string comment = 6;
   string sql = 7;
   map<string, string> flow_options = 8;
 }
 
 message DropRequest { FlowId flow_id = 1; }
-