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https://issues.apache.org/jira/browse/IGNITE-9480?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16605701#comment-16605701
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Taras Ledkov commented on IGNITE-9480:
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[~vozerov], please take a look at the suggested [H2
patch|https://github.com/h2database/h2database/pull/1424] .
> SQL: Introduce H2 LocalResult factory
> -------------------------------------
>
> Key: IGNITE-9480
> URL: https://issues.apache.org/jira/browse/IGNITE-9480
> Project: Ignite
> Issue Type: Improvement
> Components: sql
> Affects Versions: 2.6
> Reporter: Taras Ledkov
> Assignee: Taras Ledkov
> Priority: Major
> Fix For: 2.7
>
>
> H2 collects query result at the instance of `LocalResult` for queries results
> that not be gathered lazy. This causes an OOME error on large result sets.
> We have to introduce way to use our own implementation of the query result's
> container.
> Suggestion fix:
> - H2 simple refactoring: make `LocalResult` interface and H2 default
> implementation `LocalResultImpl`
> - Add H2 configurable `LocalResultFactory` to setup custom implementation of
> the `LocalResult.
> - Create Ignite implementation of `LocalResultFactory` & `LocalResult` to
> track allocated memory, swap results to external storage etc.
> H2 issue:
> [#1405|https://github.com/h2database/h2database/issues/1405#issuecomment-417631253]
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