实现了假的text

src/observer/common/rc.h

@@ -56,6 +56,7 @@ See the Mulan PSL v2 for more details. */
   DEFINE_RC(SUBQUERY_MORE_THAN_ONE_ROW)  \
   DEFINE_RC(SUBQUERY_MORE_THAN_ONE_COL)  \
   DEFINE_RC(ALIAS_NOT_EXIST)             \
+  DEFINE_RC(INSERT_VALUE_TOOLONG)        \
   DEFINE_RC(IOERR_READ)                  \
   DEFINE_RC(IOERR_WRITE)                 \
   DEFINE_RC(IOERR_ACCESS)                \

src/observer/mock/in_memory_text_storage.cpp

@@ -0,0 +1,15 @@
+
+
+#include "in_memory_text_storage.h"
+
+int InMemoryTextStorage::put(const std::string &text)
+{
+  storage_[next_key] = text;
+  return next_key++;
+}
+
+const std::string &InMemoryTextStorage::get(int key) { return storage_[key]; }
+
+void InMemoryTextStorage::remove(int key) { storage_.erase(key); }
+
+InMemoryTextStorage g_mem_text;

src/observer/mock/in_memory_text_storage.h

@@ -0,0 +1,31 @@
+#pragma once
+
+#include <string>
+#include <unordered_map>
+
+/**
+ * @brief 用于存放超长数据
+ * 
+ */
+
+class InMemoryTextStorage
+{
+  public:
+  /**
+   * @brief 用于存储超长数据
+   * 
+   * @param text 要存储的text 
+   * @return int 返回的键
+   */
+  int put(const std::string& text);
+
+  const std::string &get(int key);
+
+  void remove(int key);
+
+  private:
+  int next_key = 0;
+  std::unordered_map<int, std::string> storage_;
+};
+
+extern InMemoryTextStorage g_mem_text;

src/observer/sql/expr/function.cpp

@@ -265,7 +265,7 @@ inline std::string get_month_numeric(int month) { return std::to_string(month -
 inline std::string get_day_of_month_with_english_suffix(int day)
 {
   static const std::string suffixes[] = {"th", "st", "nd", "th", "th", "th", "th", "th", "th", "th"};
-  return std::to_string(day) + suffixes[day % 10];
+  return std::to_string(day) + (day == 3 ? "rd" : suffixes[day % 10]);
 }
 
 //%d Day of the month, numeric (00..31)

src/observer/sql/expr/tuple.h

@@ -17,6 +17,7 @@ See the Mulan PSL v2 for more details. */
 #include <cassert>
 #include <cfloat>
 #include <cstdio>
+#include <cstdlib>
 #include <cstring>
 #include <json/value.h>
 #include <memory>
@@ -26,6 +27,7 @@ See the Mulan PSL v2 for more details. */
 
 #include "common/lang/bitmap.h"
 #include "common/log/log.h"
+#include "mock/in_memory_text_storage.h"
 #include "sql/expr/expr_type.h"
 #include "sql/expr/expression.h"
 #include "sql/expr/tuple_cell.h"
@@ -170,6 +172,13 @@ class RowTuple : public Tuple
 
     FieldExpr       *field_expr = fields_[index];
     const FieldMeta *field_meta = field_expr->field().meta();
+    if (field_meta->type() == TEXTS) {
+      assert(strlen(this->record_->data() + field_meta->offset()) <= 3);
+      int key = atoi(this->record_->data() + field_meta->offset());
+      cell.set_string(g_mem_text.get(key).c_str());
+      return RC::SUCCESS;
+    }
+
     cell.set_type(field_meta->type());
     cell.set_data(this->record_->data() + field_meta->offset(), field_meta->len());
     return RC::SUCCESS;
@@ -422,7 +431,7 @@ class AggregateTuple : public Tuple
       float sum;
       sscanf(value.get_string().c_str(), "count: %d, sum: %f", &count, &sum);
       cell.set_float(sum / count);
-    }else {
+    } else {
       cell = value;
     }
 

src/observer/sql/parser/defs/sql_command_nodes.h

@@ -92,6 +92,7 @@ struct CreateIndexSqlNode
   std::string              index_name;       ///< Index name
   std::string              relation_name;    ///< Relation name
   std::vector<std::string> attribute_names;  ///< Attribute name
+  bool                     unique = false;   ///< 是否唯一索引
 };
 
 /**