Github user hvanhovell commented on a diff in the pull request:
https://github.com/apache/spark/pull/19559#discussion_r146309332
--- Diff:
sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4 ---
@@ -585,6 +584,7 @@ primaryExpression
| identifier
#columnReference
| base=primaryExpression '.' fieldName=identifier
#dereference
| '(' expression ')'
#parenthesizedExpression
+ | name=(CURRENT_DATE | CURRENT_TIMESTAMP)
#timeFunctionCall
--- End diff --
Won't this break every use of `CURRENT_DATE`/`CURRENT_TIMESTAMP`? They will
now be interpreted as an identifier.
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