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Posted to issues@calcite.apache.org by "Amogh Margoor (JIRA)" <ji...@apache.org> on 2015/07/06 08:02:06 UTC

[jira] [Created] (CALCITE-787) Star table is being assigned to MaterializedView even when it's not required.

Amogh Margoor created CALCITE-787:
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             Summary: 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
            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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