*: fix a bug that the pessimistic lock doesn't work on a partition (#14921) #15086
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cherry-pick #14921 to release-4.0
What problem does this PR solve?
'select ... for update' doesn't work right on a partitioned table.
In pessimistic txn mode, txn2 should be blocked.
What is changed and how it works?
The bug is that we use table ID to construct the lock key.
On a partitioned table, partition ID should be used.
Changes:
Check List
Tests
Code changes
Side effects
Related changes
Release note