Taras Ledkov created IGNITE-9480:
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Summary: 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
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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