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