[jira] [Resolved] (SPARK-35093) AQE columnar mismatch on exchange reuse

["Thomas Graves (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-35093?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Thomas Graves resolved SPARK-35093.
-----------------------------------
    Fix Version/s: 3.2.0
                   3.1.2
                   3.0.3
         Assignee: Andy Grove
       Resolution: Fixed

> AQE columnar mismatch on exchange reuse
> ---------------------------------------
>
>                 Key: SPARK-35093
>                 URL: https://issues.apache.org/jira/browse/SPARK-35093
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 3.0.2, 3.1.1
>            Reporter: Andy Grove
>            Assignee: Andy Grove
>            Priority: Major
>             Fix For: 3.0.3, 3.1.2, 3.2.0
>
>
> With AQE enabled, AdaptiveSparkPlanExec will attempt to reuse exchanges that are semantically equal.
> This is done by comparing the canonicalized plan for two Exchange nodes to see if they are the same.
> Unfortunately this does not take into account the fact that two exchanges with the same canonical plan might be replaced by a plugin in a way that makes them not compatible. For example, a plugin could create one version with supportsColumnar=true and another with supportsColumnar=false. It is not valid to re-use exchanges if there is a supportsColumnar mismatch.
> I have tested a fix for this and will put up a PR once I figure out how to write the tests.
>  
>  



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