davidm-db commented on code in PR #47146:
URL: https://github.com/apache/spark/pull/47146#discussion_r1662549328
##########
sql/api/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBaseParser.g4:
##########
@@ -68,6 +68,18 @@ singleStatement
: statement SEMICOLON* EOF
;
+label
+ : multipartIdentifier
+ ;
+
+beginLabel
Review Comment:
any reason not not use `multipartIdentifier` directly in `beginLabel` and
`endLabel`?
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala:
##########
@@ -121,28 +121,43 @@ class AstBuilder extends DataTypeAstBuilder with
SQLConfHelper with Logging {
visit(s).asInstanceOf[CompoundBody]
}.getOrElse {
val logicalPlan = visitSingleStatement(ctx.singleStatement())
- CompoundBody(Seq(SingleStatement(parsedPlan = logicalPlan)))
+ CompoundBody(Seq(SingleStatement(parsedPlan = logicalPlan)),
+ java.util.UUID.randomUUID.toString)
}
}
override def visitSingleCompoundStatement(ctx:
SingleCompoundStatementContext): CompoundBody = {
visit(ctx.beginEndCompoundBlock()).asInstanceOf[CompoundBody]
}
- private def visitCompoundBodyImpl(ctx: CompoundBodyContext): CompoundBody = {
+ private def visitCompoundBodyImpl(ctx: CompoundBodyContext, label: String):
CompoundBody = {
val buff = ListBuffer[CompoundPlanStatement]()
ctx.compoundStatements.forEach(compoundStatement => {
buff += visit(compoundStatement).asInstanceOf[CompoundPlanStatement]
})
- CompoundBody(buff.toSeq)
+ CompoundBody(buff.toSeq, label)
}
override def visitBeginEndCompoundBlock(ctx: BeginEndCompoundBlockContext):
CompoundBody = {
- visitCompoundBodyImpl(ctx.compoundBody())
+ val beginLabelCtx = Option(ctx.beginLabel())
+ val endLabelCtx = Option(ctx.endLabel())
+
+ (beginLabelCtx, endLabelCtx) match {
+ case (Some(bl: BeginLabelContext), Some(el: EndLabelContext))
+ if bl.label().getText.nonEmpty && bl.label().getText !=
el.label().getText =>
+ throw SparkException.internalError("Both labels should be same.")
+ case (None, Some(_)) =>
+ throw SparkException.internalError("End label can't exist without
begin label.")
+ case _ =>
+ }
+
+ val labelText = beginLabelCtx.
+ map(_.label().getText).getOrElse(java.util.UUID.randomUUID.toString)
+ visitCompoundBodyImpl(ctx.compoundBody(), labelText)
}
override def visitCompoundBody(ctx: CompoundBodyContext): CompoundBody = {
- visitCompoundBodyImpl(ctx)
+ visitCompoundBodyImpl(ctx, "")
Review Comment:
nit: Maybe make `label` as an optional param with default "" value?
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