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Posted to issues@ignite.apache.org by "Konstantin Orlov (Jira)" <ji...@apache.org> on 2021/08/31 10:24:00 UTC

[jira] [Commented] (IGNITE-14307) Calcite. Use statistics in cost model.

    [ https://issues.apache.org/jira/browse/IGNITE-14307?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17407223#comment-17407223 ] 

Konstantin Orlov commented on IGNITE-14307:
-------------------------------------------

[~tledkov-gridgain], could you please take a look? The most interesting part is the very last commit in the PR.

> Calcite. Use statistics in cost model.
> --------------------------------------
>
>                 Key: IGNITE-14307
>                 URL: https://issues.apache.org/jira/browse/IGNITE-14307
>             Project: Ignite
>          Issue Type: Improvement
>          Components: sql
>            Reporter: Yury Gerzhedovich
>            Assignee: Konstantin Orlov
>            Priority: Critical
>              Labels: calcite2-required, calcite3-required
>          Time Spent: 16.5h
>  Remaining Estimate: 0h
>
> Currently, we use only table size for the cost model, however as [IEP-58|https://cwiki.apache.org/confluence/display/IGNITE/IEP-58%3A+Statistics+for+SQL+query+optimization] will be implemented we could use it to improve our cost model,



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