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https://issues.apache.org/jira/browse/IGNITE-13919?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aleksey Plekhanov updated IGNITE-13919:
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Labels: calcite calcite3-required (was: calcite2-required
calcite3-required)
> Calcite integration. Single group aggregates
> --------------------------------------------
>
> Key: IGNITE-13919
> URL: https://issues.apache.org/jira/browse/IGNITE-13919
> Project: Ignite
> Issue Type: Improvement
> Components: sql
> Reporter: Taras Ledkov
> Assignee: Aleksey Plekhanov
> Priority: Minor
> Labels: calcite, calcite3-required
> Fix For: 2.15
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> Investigate the optimization for single group aggregates,
> e.g.: {{SELECT <aggregates> FROM <table>}}
> Now the hash based aggregates are used for this case.
> We can obtain a little performance improvement.
> Also the special cases (e.g.: {{SELECT COUNT(<any-columns>) FROM <table>}})
> may be optimized to use table/cache size.
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