cloud-fan commented on code in PR #49518:
URL: https://github.com/apache/spark/pull/49518#discussion_r1924741615
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/ResolveWithCTE.scala:
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@@ -183,4 +184,52 @@ object ResolveWithCTE extends Rule[LogicalPlan] {
columnNames.map(UnresolvedSubqueryColumnAliases(_, ref)).getOrElse(ref)
}
}
+
+ /**
+ * Checks if data types of anchor and recursive terms of a recursive CTE
definition match.
+ */
+ def checkDataTypesAnchorAndRecursiveTerm(unionLoop: UnionLoop): Unit = {
+ val anchorOutputDatatypes = unionLoop.anchor.output.map(_.dataType)
+ val recursiveTermOutputDatatypes =
unionLoop.recursion.output.map(_.dataType)
+
+ if (!anchorOutputDatatypes.zip(recursiveTermOutputDatatypes).forall {
Review Comment:
is it really needed? The type check for Union will report error anyway,
right?
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