cloud-fan commented on code in PR #52866:
URL: https://github.com/apache/spark/pull/52866#discussion_r2511282662
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/ResolveMergeIntoSchemaEvolution.scala:
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@@ -34,24 +35,104 @@ import
org.apache.spark.sql.execution.datasources.v2.DataSourceV2Relation
object ResolveMergeIntoSchemaEvolution extends Rule[LogicalPlan] {
override def apply(plan: LogicalPlan): LogicalPlan = plan resolveOperators {
- case m @ MergeIntoTable(_, _, _, _, _, _, _)
- if m.needSchemaEvolution =>
+ // This rule should run only if all assignments are resolved, except those
+ // that will be satisfied by schema evolution
+ case m @ MergeIntoTable(_, _, _, _, _, _, _) if m.needSchemaEvolution =>
val newTarget = m.targetTable.transform {
- case r : DataSourceV2Relation => performSchemaEvolution(r,
m.sourceTable)
+ case r : DataSourceV2Relation => performSchemaEvolution(r, m)
}
- m.copy(targetTable = newTarget)
+
+ // Unresolve all references based on old target output
Review Comment:
This is tricky, I think we can just update their attribute ids? See
`QueryPlan#transformUpWithNewOutput`
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