Github user maropu commented on a diff in the pull request: https://github.com/apache/spark/pull/18079#discussion_r118834758 --- Diff: sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4 --- @@ -711,7 +711,7 @@ nonReserved | ADD | OVER | PARTITION | RANGE | ROWS | PRECEDING | FOLLOWING | CURRENT | ROW | LAST | FIRST | AFTER | MAP | ARRAY | STRUCT - | LATERAL | WINDOW | REDUCE | TRANSFORM | USING | SERDE | SERDEPROPERTIES | RECORDREADER --- End diff -- BTW, how did we decide these non-reserved words for Spark? It seems a lot of non-reserved words (e.g., `CUBE` and `GROUPING`) in Spark is the reserved ones in the ANSI standard...
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