[jira] [Created] (IGNITE-9616) SQL: Introduce H2 factory for holder of aggregate result

[Anton Vinogradov (Jira)]

Taras Ledkov created IGNITE-9616:
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             Summary: SQL: Introduce H2 factory for holder of aggregate result
                 Key: IGNITE-9616
                 URL: https://issues.apache.org/jira/browse/IGNITE-9616
             Project: Ignite
          Issue Type: Improvement
          Components: sql
    Affects Versions: 2.6
            Reporter: Taras Ledkov


H2 collects aggregate results at the simple HashMap (groups set and values set).
This causes an OOME error on large groups set and large group size with {{DISTINCT}}.

We have to introduce way to use our own implementation of the aggregate result's container.




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