dm: add compactor for syncer

[GMHDBJD]

What problem does this PR solve?

add compactor to compact dml

What is changed and how it works?

# Assuming that UPDATE statement does not update the primary key. If no primary key, choose a UNIQUE NOT NULL Key.
# If UPDATE statement update the primary key or unique key, split it into one DELETE and one INSERT statement.
# We list two successive DMLs of one row and the result that can be compacted. X means this situation will not happen.
INSERT + INSERT => X
INSERT + UPDATE => INSERT
INSERT + DELETE => DELETE
UPDATE + INSERT => X
UPDATE + UPDATE => UPDATE
UPDATE + DELETE => DELETE
DELETE + INSERT => UPDATE
DELETE + UPDATE => X
DELETE + DELETE => X

Check List

Tests

• Unit test
• Integration test

Support compacting DML during the incremental replication

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• Ehco1996
• lance6716

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[CLAassistant]

All committers have signed the CLA.

[GMHDBJD]

@Ehco1996 @lance6716 PTAL fefa97c

[GMHDBJD]

/run-all-tests
/run-dm-integration-tests

[Ehco1996]

LGTM

[lance6716]

/hold
waiting address comment in dm pr

[GMHDBJD]

/run-all-tests
/run-dm-integration-tests

[GMHDBJD]

/run-all-tests

[GMHDBJD]

@glorv
Do you have any other comments

[Ehco1996]

rest LGTM

[glorv]

/unhold

[GMHDBJD]

/merge

[ti-chi-bot]

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

Commit hash: bd151d1

[codecov-commenter]

Codecov Report

Merging #3162 (bd151d1) into master (3c3b915) will decrease coverage by 0.3141%.
The diff coverage is 51.4199%.

@@               Coverage Diff                @@
##             master      #3162        +/-   ##
================================================
- Coverage   57.2251%   56.9109%   -0.3142%     
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  Files           163        210        +47     
  Lines         19453      22667      +3214     
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+ Hits          11132      12900      +1768     
- Misses         7261       8451      +1190     
- Partials       1060       1316       +256