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Taras Ledkov updated IGNITE-9616: --------------------------------- Description: 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. H2 issue: [#1433|https://github.com/h2database/h2database/issues/1433#issuecomment-421045128] was: 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. > 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 > Priority: Major > > 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. > H2 issue: > [#1433|https://github.com/h2database/h2database/issues/1433#issuecomment-421045128] -- This message was sent by Atlassian JIRA (v7.6.3#76005)