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https://issues.apache.org/jira/browse/CALCITE-7795?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18137928#comment-18137928
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Ruben Q L commented on CALCITE-7795:
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[~oliverlee] , I think you were the main contributor for the "must-filter"
column features back in the day. Just pinging you in case you want to take a
look at this improvement.
> SemanticTable FilterRequirement is dropped by certain query shapes
> ------------------------------------------------------------------
>
> Key: CALCITE-7795
> URL: https://issues.apache.org/jira/browse/CALCITE-7795
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Ruben Q L
> Assignee: Ruben Q L
> Priority: Major
> Labels: pull-request-available
>
> FilterRequirement propagation between validator namespaces is opt-in per
> namespace class and consumed at only two gates, so many query shapes
> (set-ops, alias-with-column-list, PIVOT/UNPIVOT/MATCH_RECOGNIZE/table
> functions, subqueries, INSERT/UPDATE/MERGE/DELETE sources, cross-scope bypass
> purge) silently drop or defuse the embedder's mandatory-filter obligation.
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