gatorsmile commented on a change in pull request #24842: [SPARK-28002][SQL]
Support WITH clause column aliases
URL: https://github.com/apache/spark/pull/24842#discussion_r296502627
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File path:
sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4
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@@ -319,7 +319,7 @@ ctes
;
namedQuery
- : name=identifier AS? '(' query ')'
+ : name=identifier (columnAliases=identifierList)? AS? '(' query ')'
Review comment:
Duplicate names within a single CTE definition are not allowed.
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