executor: revert #36498 to avoid perf regression

[zyguan]

Signed-off-by: zyguan zhongyangguan@gmail.com

What problem does this PR solve?

Issue Number: ref #36438

Problem Summary: as described in #36438 (comment).

What is changed and how it works?

Revert #36498 to avoid accumulating LOCK records on unique keys.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• cfzjywxk
• ekexium

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[sre-bot]

Code Coverage Details: https://codecov.io/github/pingcap/tidb/commit/0be5140ae5894773db2bcb12e7eb848f07baf236

[cfzjywxk]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 0be5140