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https://issues.apache.org/jira/browse/SPARK-61201?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SPARK-61201:
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Labels: pull-request-available (was: )
> Add whole-stage codegen to the sort-merge ASOF join
> ---------------------------------------------------
>
> Key: SPARK-61201
> URL: https://issues.apache.org/jira/browse/SPARK-61201
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 4.4.0
> Reporter: Luka Zdravic
> Priority: Minor
> Labels: pull-request-available
>
> SortMergeAsOfJoinExec does not support whole-stage codegen. Every row goes
> through the interpreted SortMergeAsOfJoinScanner, and the join ends the
> codegen stage of the operators above it.
> Add whole-stage codegen for backward and forward ASOF joins. Generate the
> cursor scan, the buffered group scan, the ON key compare and the join
> conditions, and pass the output columns straight to the parent. Keep the
> spillable right-side buffer as a Scala object, as SortMergeJoinExec does.
> Nearest joins keep the interpreted scan. An internal config,
> spark.sql.codegen.join.sortMergeAsOfJoin.enabled (default true), turns it off.
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