Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/18338#discussion_r122583408
--- Diff:
sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4 ---
@@ -561,6 +561,7 @@ primaryExpression
| CASE whenClause+ (ELSE elseExpression=expression)? END
#searchedCase
| CASE value=expression whenClause+ (ELSE elseExpression=expression)?
END #simpleCase
| CAST '(' expression AS dataType ')'
#cast
+ | STRUCT '(' (argument+=namedExpression (','
argument+=namedExpression)*)? ')' #struct
--- End diff --
cc @hvanhovell Is `STRUCT` the only function that needs alias column names?
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