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https://issues.apache.org/jira/browse/CALCITE-3373?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17932518#comment-17932518
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Julian Hyde edited comment on CALCITE-3373 at 3/6/25 12:09 AM:
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[~julianhyde] I'm glad to work on it, you can assign it to me.
To add this logic into {{SubQueryRemoveRule}}, I think we can add a
{{rewrite_to_semi_join}} option in {{SubQueryRemoveRule.Config}}. If it's
enabled, we try to rewrite the SubQuery to Semi/Anti Join, and fallback to
existing logic if it can not be rewritten
was (Author: JIRAUSER300637):
[~julianhyde] I'm glad to work on it, you can assign it to me.
To add this logic into {{SubQueryRemoveRule, I think we can add a
`rewrite_to_semi_join` option in }}{{SubQueryRemoveRule.Config. If it's
enabled, we try to rewrite the SubQuery to Semi/Anti Join, and fallback to
existing logic if it can not be rewritten}}
> Decorrelate boolean context IN or existential subquery directly into
> SEMI/ANTI join
> -----------------------------------------------------------------------------------
>
> Key: CALCITE-3373
> URL: https://issues.apache.org/jira/browse/CALCITE-3373
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Jin Xing
> Assignee: Viggo Chen
> Priority: Major
> Attachments: image-2025-03-02-17-04-54-608.png
>
>
> The current approach to generate semi-join from IN/EXISTS is as below:
> # Decorrelation
> # Transforming by SemiJoinRule to get a semi-join
> A more straightforward approach is to generate the semi-join right in
> Decorrelation.
> What's more, we should also have an approach to generate anti-join right in
> Decorrelation.(Currently there's no analogous rule to SemiJoinRule for
> anti-join)
> This one is related to CALCITE-3367
>
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