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Posted to issues@calcite.apache.org by "Julian Hyde (JIRA)" <ji...@apache.org> on 2015/05/04 19:52:05 UTC

[jira] [Created] (CALCITE-711) Cardinality provider for use by lattice algorithm

Julian Hyde created CALCITE-711:
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             Summary: Cardinality provider for use by lattice algorithm
                 Key: CALCITE-711
                 URL: https://issues.apache.org/jira/browse/CALCITE-711
             Project: Calcite
          Issue Type: Bug
            Reporter: Julian Hyde
            Assignee: Julian Hyde


Define a cardinality provider SPI for use by the lattice recommendation algorithm. Also:
* Obsolete Lattice.CARDINALITY_MAP (by wrapping it in a mock provider).
* Create a JDBC cardinality provider, that gets cardinality by executing "count(distinct ...)".



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