Add today alias for current_date (#8423)

* fix conflict * add md * add test * add test * addr comments * Update datafusion/sqllogictest/test_files/timestamps.slt Co-authored-by: Alex Huang <[email protected]> --------- Co-authored-by: zhongjingxiong <[email protected]> Co-authored-by: Alex Huang <[email protected]>
apache · Dec 12, 2023 · 1154274 · 1154274
1 parent 95ba48b
commit 1154274
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diff --git a/datafusion/expr/src/built_in_function.rs b/datafusion/expr/src/built_in_function.rs
@@ -1532,7 +1532,7 @@ impl BuiltinScalarFunction {
 
             // time/date functions
             BuiltinScalarFunction::Now => &["now"],
-            BuiltinScalarFunction::CurrentDate => &["current_date"],
+            BuiltinScalarFunction::CurrentDate => &["current_date", "today"],
             BuiltinScalarFunction::CurrentTime => &["current_time"],
             BuiltinScalarFunction::DateBin => &["date_bin"],
             BuiltinScalarFunction::DateTrunc => &["date_trunc", "datetrunc"],

diff --git a/datafusion/sqllogictest/test_files/timestamps.slt b/datafusion/sqllogictest/test_files/timestamps.slt
@@ -46,6 +46,30 @@ statement ok
 create table ts_data_secs as select arrow_cast(ts / 1000000000, 'Timestamp(Second, None)') as ts, value from ts_data;
 
 
+##########
+## Current date Tests
+##########
+
+query B
+select cast(now() as date) = current_date();
+----
+true
+
+query B
+select now() = current_date();
+----
+false
+
+query B
+select current_date() = today();
+----
+true
+
+query B
+select cast(now() as date) = today();
+----
+true
+
 
 ##########
 ## Timestamp Handling Tests

diff --git a/docs/source/user-guide/sql/scalar_functions.md b/docs/source/user-guide/sql/scalar_functions.md
@@ -1280,6 +1280,7 @@ regexp_replace(str, regexp, replacement, flags)
 - [datepart](#datepart)
 - [extract](#extract)
 - [to_timestamp](#to_timestamp)
+- [today](#today)
 - [to_timestamp_millis](#to_timestamp_millis)
 - [to_timestamp_micros](#to_timestamp_micros)
 - [to_timestamp_seconds](#to_timestamp_seconds)
@@ -1308,6 +1309,14 @@ no matter when in the query plan the function executes.
 current_date()
 ```
 
+#### Aliases
+
+- today
+
+### `today`
+
+_Alias of [current_date](#current_date)._
+
 ### `current_time`
 
 Returns the current UTC time.