srielau commented on code in PR #52173:
URL: https://github.com/apache/spark/pull/52173#discussion_r2341689053
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/ResolveSetVariable.scala:
##########
@@ -53,24 +68,17 @@ class ResolveSetVariable(val catalogManager:
CatalogManager) extends Rule[Logica
"Unexpected target variable expression in SetVariable: " + other)
}
- // Protect against duplicate variable names
- // Names are normalized when the variables are created.
- // No need for case insensitive comparison here.
- // TODO: we need to group by the qualified variable name once other
catalogs support it.
- val dups = resolvedVars.groupBy(_.identifier).filter(kv => kv._2.length
> 1)
- if (dups.nonEmpty) {
- throw new AnalysisException(
- errorClass = "DUPLICATE_ASSIGNMENTS",
- messageParameters = Map("nameList" ->
- dups.keys.map(key => toSQLId(key.name())).mkString(", ")))
- }
-
setVariable.copy(targetVariables = resolvedVars)
case setVariable: SetVariable
if
setVariable.targetVariables.forall(_.isInstanceOf[VariableReference]) &&
setVariable.sourceQuery.resolved =>
val targetVariables =
setVariable.targetVariables.map(_.asInstanceOf[VariableReference])
+
+ // Check for duplicate variable names - this handles both regular SET
VAR (after resolution)
+ // and EXECUTE IMMEDIATE ... INTO (which comes pre-resolved)
+ checkForDuplicateVariables(targetVariables)
Review Comment:
Correct. Delaying it made sure it's caught.
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