cloud-fan commented on a change in pull request #23259: [SPARK-26215][SQL]
Define reserved/non-reserved keywords based on the ANSI SQL standard
URL: https://github.com/apache/spark/pull/23259#discussion_r258370407
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File path:
sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4
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@@ -762,8 +763,11 @@ ansiReserved
| USING | WHEN | WHERE | WITH
;
+// When `spark.sql.parser.ansi.enabled` = true, the `ansiNonReserved` keywords
can be used for identifiers.
Review comment:
so `ansiReserved` + `ansiNonReserved` are all the keywords in Spark? Can we
add a note here? If in the future someone adds a new keyword, he must put it
either in `ansiReserved` or in `ansiNonReserved`.
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