davidm-db commented on code in PR #47404:
URL: https://github.com/apache/spark/pull/47404#discussion_r1683087387
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala:
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@@ -133,12 +133,36 @@ class AstBuilder extends DataTypeAstBuilder with
SQLConfHelper with Logging {
private def visitCompoundBodyImpl(
ctx: CompoundBodyContext,
- label: Option[String]): CompoundBody = {
+ label: Option[String],
+ allowPrefixDeclare: Boolean): CompoundBody = {
val buff = ListBuffer[CompoundPlanStatement]()
ctx.compoundStatements.forEach(compoundStatement => {
buff += visit(compoundStatement).asInstanceOf[CompoundPlanStatement]
})
+ val compoundStatements = buff.toList
+
+ if (allowPrefixDeclare) {
+ val declareAfterPrefix = compoundStatements.dropWhile(
+ statement => statement.isInstanceOf[SingleStatement] &&
+
statement.asInstanceOf[SingleStatement].parsedPlan.isInstanceOf[CreateVariable])
+ .filter(_.isInstanceOf[SingleStatement])
+
.exists(_.asInstanceOf[SingleStatement].parsedPlan.isInstanceOf[CreateVariable])
+
+ if(declareAfterPrefix) {
+ throw SqlScriptingErrors.variableDeclarationOnlyAtBeginning()
+ }
+
+ } else {
+ val declareExists = compoundStatements
+ .filter(_.isInstanceOf[SingleStatement])
+
.exists(_.asInstanceOf[SingleStatement].parsedPlan.isInstanceOf[CreateVariable])
Review Comment:
same here for `find` instead of `exists`
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