util: reimplement row level checksum utilities #43141
Merged
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What problem does this PR solve?
Issue Number: ref #42747
Problem Summary:
We have implemented row level checksum utilities in #42859. However, it doesn't match the requirements for e2e checksum verification, because downstream consumers cannot calculate the checksum as tidb does. So, we reimplement checksum algorithm in this PR.
What is changed and how it works?
Check List
Tests
Side effects
The overhead of checksum calculation shall be fine.
Documentation
Release note
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