davidm-db commented on code in PR #48795:
URL: https://github.com/apache/spark/pull/48795#discussion_r1834105742
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/ParserUtils.scala:
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@@ -134,3 +139,70 @@ object ParserUtils extends SparkParserUtils {
sb.toString()
}
}
+
+object LabelUtils {
+ private val seenLabels: mutable.Set[String] = mutable.Set.empty
+
+ def init(): Unit = {
+ seenLabels.clear()
+ }
+
+ private def checkLabels(
+ beginLabelCtx: Option[BeginLabelContext],
+ endLabelCtx: Option[EndLabelContext]) : Unit = {
+ (beginLabelCtx, endLabelCtx) match {
+ case (Some(bl: BeginLabelContext), Some(el: EndLabelContext))
+ if bl.multipartIdentifier().getText.nonEmpty &&
Review Comment:
I think you are right, but also doesn't hurt to have this check in case
someone changes grammar for `multipartIdentifier` in the future for whatever
reason.
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