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Posted to issues@ignite.apache.org by "Yury Gerzhedovich (Jira)" <ji...@apache.org> on 2021/06/18 09:35:02 UTC

[jira] [Updated] (IGNITE-14784) Calcite engine. Add sorted set op (EXCEPT, INTERSECT) implementation

     [ https://issues.apache.org/jira/browse/IGNITE-14784?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yury Gerzhedovich updated IGNITE-14784:
---------------------------------------
    Labels: calcite2-required calcite3-required  (was: )

> Calcite engine. Add sorted set op (EXCEPT, INTERSECT) implementation
> --------------------------------------------------------------------
>
>                 Key: IGNITE-14784
>                 URL: https://issues.apache.org/jira/browse/IGNITE-14784
>             Project: Ignite
>          Issue Type: Improvement
>            Reporter: Aleksey Plekhanov
>            Priority: Minor
>              Labels: calcite2-required, calcite3-required
>
> Currently, we have hash-map based implementations for EXCEPT and INTERSECT operators (see {{IgniteIntersect}}, {{IgniteMinus}}, {{AbstractSetOpNode}} classes). But, if all inputs are sorted by all columns we can use that fact and implement a sorted set-op algorithm (see sorted aggregates for example).   



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