yaooqinn commented on a change in pull request #26847: [SPARK-30214][SQL]
Support COMMENT ON syntax
URL: https://github.com/apache/spark/pull/26847#discussion_r360325568
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala
##########
@@ -3410,4 +3410,22 @@ class AstBuilder(conf: SQLConf) extends
SqlBaseBaseVisitor[AnyRef] with Logging
ctx.EXISTS != null,
ctx.TEMPORARY != null)
}
+
+ override def visitCommentNamespace(ctx: CommentNamespaceContext):
LogicalPlan = withOrigin(ctx) {
+ val comment = ctx.commennt.getType match {
+ case SqlBaseParser.NULL => ""
Review comment:
for anyone may concern about this, please refer to
https://github.com/postgres/postgres/blob/master/src/backend/commands/comment.c#L133
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