Cherry pick #92390 to 25.10: Fix possible crash in aggregate functions after MEMORY_LIMIT_EXCEEDED#92428
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robot-clickhouse merged 2 commits intobackport/25.10/92390from Dec 17, 2025
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The problem is when ColumnAggregateFunction is reused after exception, this is the case of async_insert=1, where we are trying to load each INSERT batch, and if it fails, continue with other batches. The problem was that once ColumnAggregateFunction::ensureOwnership() throws, it leaves the column in a broken state, since all aggregation states up to rollback_pos will be broken. The fix is simple - just copy them from source column again. And add a unit test.
Fix possible crash in aggregate functions after MEMORY_LIMIT_EXCEEDED
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Original pull-request #92390
Do not merge this PR manually
This pull-request is a first step of an automated backporting.
It contains changes similar to calling
git cherry-picklocally.If you intend to continue backporting the changes, then resolve all conflicts if any.
Otherwise, if you do not want to backport them, then just close this pull-request.
The check results does not matter at this step - you can safely ignore them.
Troubleshooting
If the conflicts were resolved in a wrong way
If this cherry-pick PR is completely screwed by a wrong conflicts resolution, and you want to recreate it:
pr-cherrypicklabel from the PRYou also need to check the Original pull-request for
pr-backports-createdlabel, and delete if it's presented thereThe PR source
The PR is created in the CI job