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https://issues.apache.org/jira/browse/SPARK-60096?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SPARK-60096:
-----------------------------------
Labels: pull-request-available (was: )
> Raise a user-facing error instead of INTERNAL_ERROR for an unresolved Spark
> Connect DataFrame subquery plan id
> --------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-60096
> URL: https://issues.apache.org/jira/browse/SPARK-60096
> Project: Spark
> Issue Type: Improvement
> Components: Connect, SQL
> Affects Versions: 4.3.0
> Reporter: Ivan Sadikov
> Priority: Major
> Labels: pull-request-available
>
> Spark Connect turns DataFrame subqueries such as `col.isin(df)`,
> `df.scalar()`, `df.exists()`, and table arguments into `UnresolvedPlanId`
> expressions (`UnresolvedInSubqueryPlanId`, `UnresolvedScalarSubqueryPlanId`,
> `UnresolvedExistsPlanId`, `UnresolvedTableArgPlanId`). These expressions
> point to the subquery plan by plan id. Only
> `SparkConnectPlanner.transformWithRelations` replaces them with the real
> plan, and it only does so when the root relation is wrapped in a
> `WithRelations` that contains the referenced plan.
> If the referenced plan is never attached (for example, the root relation is
> not wrapped in `WithRelations`), the `UnresolvedPlanId` stays in the tree
> through analysis. No analyzer rule resolves it, and CheckAnalysis has no
> specific case for it. It therefore reaches the generic unresolved-operator
> check and fails with an internal error:
> {code:java}
> [INTERNAL_ERROR] Found the unresolved operator: ... SQLSTATE: XX000 {code}
> This is a resolution error caused by an illegal subquery reference, not a
> Spark bug. It should be reported the same way as the existing
> `CANNOT_RESOLVE_DATAFRAME_COLUMN` error, which is raised for an illegal
> DataFrame column reference.
>
> Valid queries are not affected. The only change is the error class and
> SQLSTATE for queries that already fail.
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