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https://issues.apache.org/jira/browse/SPARK-60692?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jungtaek Lim updated SPARK-60692:
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Epic Link: SPARK-60031
> Support lookup-side projections and filters, semi/anti joins and range
> predicates in external lookup join
> ---------------------------------------------------------------------------------------------------------
>
> Key: SPARK-60692
> URL: https://issues.apache.org/jira/browse/SPARK-60692
> Project: Spark
> Issue Type: Task
> Components: SQL, Structured Streaming
> Affects Versions: 4.4.0
> Reporter: Jungtaek Lim
> Priority: Major
>
> Part of SPARK-60031.
> In scope:
> - Projections and filters that remain on the lookup side after optimization
> run as lookup-side stages.
> - Filters directly over the table are pushed to the scan builder.
> - Required columns are pruned by a standalone rule,
> `PruneExternalLookupJoinColumns`. `ColumnPruning` is not changed.
> - Left semi and left anti joins.
> - `<=>` (null-safe) and `<`, `<=`, `>`, `>=` are offered as lookup
> candidates; unselected candidates stay residual.
> Out of scope:
> - Cache.
> - Pushing stream-side filters and join-condition conjuncts through the join.
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