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https://issues.apache.org/jira/browse/CALCITE-6513?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated CALCITE-6513:
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Labels: pull-request-available (was: )
> FilterProjectTransposeRule may cause OOM when Project expressions are complex
> -----------------------------------------------------------------------------
>
> Key: CALCITE-6513
> URL: https://issues.apache.org/jira/browse/CALCITE-6513
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Krisztian Kasa
> Assignee: Krisztian Kasa
> Priority: Major
> Labels: pull-request-available
>
> CALCITE-3774 addresses preventing merging projects when the resulting
> expressions in the merged project are too complex and lead to slow
> compilation or out of memory.
> However, when there is a {{Filter}} on top of the {{Projects}} with a
> predicate referencing the complex expressions {{FilterProjectTransposeRule}}
> tries to push down the {{Filter}} below the bottom {{Project}} merging the
> expressions and causing OOM.
> The issue was initially reproduced using Hive with the Hive version of
> {{FilterProjectTransposeRule}}. See: HIVE-28264
> Calcite is also affected:
> [https://github.com/kasakrisz/calcite/commit/b35a02f368624a9c4768f348cd072a95ed6de3e1]
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