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https://issues.apache.org/jira/browse/CALCITE-711?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde closed CALCITE-711.
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Resolution: Duplicate
> 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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