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From "Valentin Kulichenko (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-7167) Optimize 'select count(*) from Table'
Date Mon, 11 Dec 2017 21:42:00 GMT
Valentin Kulichenko created IGNITE-7167:
-------------------------------------------

             Summary: Optimize 'select count(*) from Table'
                 Key: IGNITE-7167
                 URL: https://issues.apache.org/jira/browse/IGNITE-7167
             Project: Ignite
          Issue Type: Improvement
          Components: sql
    Affects Versions: 2.3
            Reporter: Valentin Kulichenko


Currently query like {{select count(*) from Table}} effectively scans the cache and take a
lot of time for large datasets. Probably makes sense to optimize it to use {{IgniteCache#size}}
directly when possible.



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