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concurrency: integrate lock Modes in the lock table #102210

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#104620
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concurrency: integrate lock Modes in the lock table#102210
#104620
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arulajmani
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A-read-committedRelated to the introduction of Read CommittedC-enhancementSolution expected to add code/behavior + preserve backward-compat (pg compat issues are exception)T-kvKV Team
@arulajmani

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@arulajmani
arulajmani
opened on Apr 25, 2023

Is your feature request related to a problem? Please describe.

We introduced the concept of lock.Modes in #96026. Lock modes encapsulate all the information required to perform conflict resolution between any 2 locks.

Today, the lock table uses SpanAccess information in conjunction with the timestamp at which a lock is held to perform conflict resolution. The concept of SpanAccess doesn't extend to SHARED locks. We should instead switch to constructing and using lock.Modes to perform conflict resolution.

Jira issue: CRDB-27341

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A-read-committedRelated to the introduction of Read CommittedC-enhancementSolution expected to add code/behavior + preserve backward-compat (pg compat issues are exception)T-kvKV Team

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