expression: support timestampdiff pushdown to tikv

[gengliqi]

What problem does this PR solve?

Issue Number: close #59365

Problem Summary:

What changed and how does it work?

expression: support timestampdiff pushdown to tikv

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.

support `timestampdiff` pushdown to tikv

[tiprow]

Hi @gengliqi. Thanks for your PR.

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[gengliqi]

/ok-to-test

[yibin87]

LGTM

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-02-10 08:57:04.197853899 +0000 UTC m=+260466.594075956: ☑️ agreed by wshwsh12.
• 2025-02-10 09:07:19.961818448 +0000 UTC m=+261082.358040510: ☑️ agreed by yibin87.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.5171%. Comparing base (1df0f7e) to head (77f8d4b).
Report is 1 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #59366        +/-   ##
================================================
+ Coverage   73.0210%   73.5171%   +0.4960%     
================================================
  Files          1690       1690                
  Lines        467068     467359       +291     
================================================
+ Hits         341058     343589      +2531     
+ Misses       105020     102790      -2230     
+ Partials      20990      20980        -10     

Flag	Coverage Δ
integration	43.0426% <ø> (?)
unit	72.2551% <ø> (+0.0471%)	⬆️

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

Components	Coverage Δ
dumpling	52.6910% <ø> (ø)
parser	∅ <ø> (∅)
br	45.5345% <ø> (ø)

[windtalker]

lgtm

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: windtalker, wshwsh12, yibin87

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• OWNERS [windtalker,wshwsh12]
• pkg/expression/OWNERS [windtalker]

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