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Posted to issues@ignite.apache.org by "Alexander Belyak (Jira)" <ji...@apache.org> on 2021/06/09 12:38:00 UTC

[jira] [Created] (IGNITE-14855) Index/Correlated statistics

Alexander Belyak created IGNITE-14855:
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             Summary: Index/Correlated statistics
                 Key: IGNITE-14855
                 URL: https://issues.apache.org/jira/browse/IGNITE-14855
             Project: Ignite
          Issue Type: Improvement
          Components: sql
            Reporter: Alexander Belyak


To improve multi-column join selectivity prediction Ignite can calculate statistics on few columns at once. For full index or for specified list of columns. Query optimizer should use it (if they exists) instead of single column statistics.



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