concurrency: rollback ignored sequence numbers on lock acquisition #103493
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This patch adds logic to prune the list of sequence numbers tracked by the lock table for unreplicated locks. This is done when some of the tracked sequence numbers are considered ignored, by virtue of a savepoint rollback. Note that we only do so for unreplicated locks, and only if an unreplicated lock is being reacquired. This is because the in-memory lock table is only the source of truth for in-memory locks; the mvcc keyspace is the source of truth for replicated ones. As such, trying to mimic the logic is hard/error-prone -- so we don't attempt to do so. Fixes cockroachdb#102269 Release note: None
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This patch adds logic to prune the list of sequence numbers tracked by
the lock table for unreplicated locks. This is done when some of the
tracked sequence numbers are considered ignored, by virtue of a
savepoint rollback.
Note that we only do so for unreplicated locks, and only if an
unreplicated lock is being reacquired. This is because the in-memory
lock table is only the source of truth for in-memory locks; the mvcc
keyspace is the source of truth for replicated ones. As such, trying
to mimic the logic is hard/error-prone -- so we don't attempt to do
so.
Fixes #102269
Release note: None