[
https://issues.apache.org/jira/browse/SPARK-30811?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Dongjoon Hyun resolved SPARK-30811.
-----------------------------------
Fix Version/s: 2.4.6
Resolution: Fixed
Issue resolved by pull request 27562
[https://github.com/apache/spark/pull/27562]
> CTE that refers to non-existent table with same name causes StackOverflowError
> ------------------------------------------------------------------------------
>
> Key: SPARK-30811
> URL: https://issues.apache.org/jira/browse/SPARK-30811
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.0.2, 2.1.3, 2.2.3, 2.3.4, 2.4.5
> Reporter: Herman van Hövell
> Assignee: Herman van Hövell
> Priority: Major
> Fix For: 2.4.6
>
>
> The following query causes a StackOverflowError:
> {noformat}
> WITH t AS (SELECT 1 FROM nonexist.t) SELECT * FROM t
> {noformat}
> This only happens when the CTE refers to a non-existent table with the same
> name and a database qualifier. This is caused by a couple of things:
> * {{CTESubstitution}} runs analysis on the CTE, but this does not throw an
> exception because the table has a database qualifier. The reason is that we
> don't fail is because we re-attempt to resolve the relation in a later rule.
> * {{CTESubstitution}} replace logic does not check if the table it is
> replacing has a database, it shouldn't replace the relation if it does. So
> now we will happily replace {{nonexist.t}} with {{t}}.
> * {{CTESubstitution}} transforms down, this means it will keep replacing
> {{t}} with itself, creating an infinite recursion.
> This is not an issue for master/3.0.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
