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https://issues.apache.org/jira/browse/CALCITE-787?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14614987#comment-14614987
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Amogh Margoor commented on CALCITE-787:
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Hi [~julianhyde]
PR is raised for this which contains fix and the reproducer:
https://github.com/apache/incubator-calcite/pull/103
Please take a look.
Regards,
Amogh
> Star table is being assigned to MaterializedView even when it's not required.
> -----------------------------------------------------------------------------
>
> Key: CALCITE-787
> URL: https://issues.apache.org/jira/browse/CALCITE-787
> Project: Calcite
> Issue Type: Task
> Components: core
> Affects Versions: 1.3.0-incubating, 1.4.0-incubating
> Reporter: Amogh Margoor
> Assignee: Julian Hyde
>
> cc: [~vrajat]
> CalciteMaterializer tries to rewrite query relnode with the star table in
> schema (the first one that fits). Utility function used is
> RelOptMaterialization::tryUseStar. Utility function should return null when
> it cannot rewrite relnode using star table, but instead it is returning the
> same relnode back. This is causing MV being assigned star table even when it
> is not required.
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