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https://issues.apache.org/jira/browse/SPARK-48967?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan reassigned SPARK-48967:
-----------------------------------
Assignee: Costas Zarifis
> Improve performance and memory footprint of "INSERT INTO ... VALUES"
> Statements
> -------------------------------------------------------------------------------
>
> Key: SPARK-48967
> URL: https://issues.apache.org/jira/browse/SPARK-48967
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 3.4.4
> Reporter: Costas Zarifis
> Assignee: Costas Zarifis
> Priority: Major
> Labels: pull-request-available
>
> Currently very large "INSERT INTO ... VALUES" statements result into
> disproportionally large parse trees as each literal will need to remain in
> the parse tree, until it eventually gets evaluated into a LocalTable, once
> the appropriate analyzer/optimizer rules have been applied.
>
> This results in increased memory pressure on the driver, when such large
> statements are generated, that can lead to OOMs and GC pauses. It also
> results in suboptimal runtime performance as the time it takes to apply
> analyzer/optimizer rules is typically proportional to the size of the parse
> tree.
>
> Both these issues can be resolved by applying the functions that evaluate the
> unresolved table into a local table eagerly from the AST Builder, thus
> short-circuiting the evaluation of such statements.
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