cloud-fan commented on a change in pull request #23880: [SPARK-26976][SQL]
Forbid reserved keywords as table identifiers when ANSI mode is on
URL: https://github.com/apache/spark/pull/23880#discussion_r259687477
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala
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@@ -1404,6 +1404,15 @@ class AstBuilder(conf: SQLConf) extends
SqlBaseBaseVisitor[AnyRef] with Logging
}
}
+ override def visitIdentifier(ctx: IdentifierContext): String =
withOrigin(ctx) {
+ val keyword = ctx.getText
+ if (ctx.ansiReserved() != null) {
+ throw new ParseException(
+ s"'$keyword' is reserved and you cannot use this keyword as an
identifier.", ctx)
Review comment:
AFAIK reserved keywords can't be used as identifiers for all kinds, like
table name/alias, column name/alias, etc. Shall we follow?
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