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Posted to issues@ignite.apache.org by "Konstantin Orlov (Jira)" <ji...@apache.org> on 2022/11/21 07:05:00 UTC

[jira] [Created] (IGNITE-18205) Sql. Allow hash output distribution for aggregations

Konstantin Orlov created IGNITE-18205:
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             Summary: Sql. Allow hash output distribution for aggregations
                 Key: IGNITE-18205
                 URL: https://issues.apache.org/jira/browse/IGNITE-18205
             Project: Ignite
          Issue Type: Improvement
          Components: sql
            Reporter: Konstantin Orlov


Currently, we allow only single output distribution for aggregates, but looks like if we have hash input distribution and all grouping set contains all of the distribution keys we can make aggregation on remote nodes and produce hash output distribution with the same keys. This will reduce memory consumption on the initiator node and make some other optimizations possible.

Reference implementation can be found here: IGNITE-16396



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