[
https://issues.apache.org/jira/browse/SPARK-43596?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Wenchen Fan resolved SPARK-43596.
---------------------------------
Fix Version/s: 3.5.0
Resolution: Fixed
Issue resolved by pull request 41265
[https://github.com/apache/spark/pull/41265]
> Subquery decorrelation rewriteDomainJoins failure from ConstantFolding to
> isnull
> --------------------------------------------------------------------------------
>
> Key: SPARK-43596
> URL: https://issues.apache.org/jira/browse/SPARK-43596
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.4.0
> Reporter: Jack Chen
> Priority: Major
> Fix For: 3.5.0
>
>
> We can get a decorrelation error because of rewrites that run in between
> DecorrelateInnerQuery and rewriteDomainJoins, that modify the correlation
> join conditions. In particular, ConstantFolding can transform `innercol <=>
> null` to `isnull(innercol)` and then rewriteDomainJoins does not recognize
> this and throws error Unable to rewrite domain join with conditions:
> ArrayBuffer(isnull(innercol#280)) because the isnull is not an equality, so
> it isn't usable for rewriting the domain join.
> Can fix by recognizing `isnull(innercol)` as `innercol <=> null` in
> rewriteDomainJoins.
> This area is also fragile in general and other rewrites that run between the
> two steps of decorrelation could potentially break their assumptions, so we
> may want to investigate longer-term follow ups for that.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
