collate: latin1_bin has the same collate with utf8mb4_bin,utf8_bin

[hawkingrei]

What problem does this PR solve?

Issue Number: close #60701

Problem Summary:

What changed and how does it work?

1、 latin1_bin, utf8mb4_bin, utf8_bin should be the same collate which has the same comparison method.

2、 merge the same code in the expressionRewriter.

Check List

Tests

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

  • I checked and no code files have been changed.

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.

collate: latin1_bin has the same collate with utf8mb4_bin,utf8_bin

collate: latin1_bin   与 utf8mb4_bin, utf8_bin 的比较方式相同

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: AilinKid, Defined2014

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Needs approval from an approver in each of these files:

• OWNERS [AilinKid,Defined2014]
• pkg/planner/OWNERS [AilinKid]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-04-22 09:44:51.01448195 +0000 UTC m=+348834.826272329: ☑️ agreed by Defined2014.
• 2025-04-22 10:03:20.646131977 +0000 UTC m=+349944.457922358: ☑️ agreed by AilinKid.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.5340%. Comparing base (634e6ab) to head (9f4a8a4).
Report is 1 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #60702        +/-   ##
================================================
+ Coverage   73.1298%   73.5340%   +0.4042%     
================================================
  Files          1716       1716                
  Lines        475628     475664        +36     
================================================
+ Hits         347826     349775      +1949     
+ Misses       106416     104496      -1920     
- Partials      21386      21393         +7     

Flag	Coverage Δ
integration	42.8429% <100.0000%> (?)
unit	72.3484% <100.0000%> (+0.0010%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
dumpling	52.6553% <ø> (ø)
parser	∅ <ø> (∅)
br	47.4213% <ø> (-0.0277%)	⬇️

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[hawkingrei]

/cherrypick release-8.5
/cherrypick release-8.1
/cherrypick release-7.5

[ti-chi-bot]

@hawkingrei: new pull request created to branch release-7.5: #60708.
But this PR has conflicts, please resolve them!

In response to this:

/cherrypick release-8.5
/cherrypick release-8.1
/cherrypick release-7.5

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.

[ti-chi-bot]

@hawkingrei: new pull request created to branch release-8.1: #60709.
But this PR has conflicts, please resolve them!

In response to this:

/cherrypick release-8.5
/cherrypick release-8.1
/cherrypick release-7.5

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.

[ti-chi-bot]

@hawkingrei: new pull request created to branch release-8.5: #60710.

In response to this:

/cherrypick release-8.5
/cherrypick release-8.1
/cherrypick release-7.5

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.