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https://issues.apache.org/jira/browse/SPARK-46683?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SPARK-46683:
-----------------------------------
Labels: correctness pull-request-available testing (was: correctness
testing)
> Write a subquery generator that generates subqueries of different variations
> to increase testing coverage in this area
> ----------------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-46683
> URL: https://issues.apache.org/jira/browse/SPARK-46683
> Project: Spark
> Issue Type: Test
> Components: Optimizer, SQL
> Affects Versions: 3.5.1
> Reporter: Andy Lam
> Priority: Major
> Labels: correctness, pull-request-available, testing
>
> There are a lot of subquery correctness issues, ranging from very old bugs to
> new ones that are being introduced due to work being done on subquery
> correlation optimization. This is especially in the areas of COUNT bugs and
> null behaviors.
> To increase test coverage and robustness in this area, we want to write a
> subquery generator that writes variations of subqueries, producing SQL tests
> that also run against Postgres (from my work in SPARK-46179).
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