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Posted to issues@ignite.apache.org by "Valentin Kulichenko (JIRA)" <ji...@apache.org> on 2018/02/13 18:40:00 UTC

[jira] [Closed] (IGNITE-7167) Optimize 'select count(*) from Table'

     [ https://issues.apache.org/jira/browse/IGNITE-7167?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Valentin Kulichenko closed IGNITE-7167.
---------------------------------------

> 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
>            Priority: Major
>
> 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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