planner: incorrect query result using ISNULL

[hawkingrei]

What problem does this PR solve?

Issue Number: close #54803

Problem Summary:

What changed and how does it work?

points2EqOrInCond will generate the Equal/IN expression according the column info and const value. but we cannot regard isnull() and = null as equivalent. so isnull should skip the points2EqOrInCond.

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.

None

[codecov]

Codecov Report

Attention: Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 74.0132%. Comparing base (d940b7d) to head (330435a).
Report is 3 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #54819        +/-   ##
================================================
+ Coverage   72.7342%   74.0132%   +1.2789%     
================================================
  Files          1570       1571         +1     
  Lines        439504     440432       +928     
================================================
+ Hits         319670     325978      +6308     
+ Misses       100069      94178      -5891     
- Partials      19765      20276       +511     

Components	Coverage Δ
dumpling	52.9567% <ø> (ø)
parser	∅ <ø> (∅)
br	52.4620% <ø> (+6.6332%)	⬆️

[hawkingrei]

/retest

[hawkingrei]

/retest

[ti-chi-bot]

PR needs rebase.

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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• OWNERS [AilinKid,winoros]
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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-08-07 06:08:12.024026235 +0000 UTC m=+418621.891125325: ☑️ agreed by winoros.
• 2024-08-07 06:37:59.193217739 +0000 UTC m=+420409.060316824: ☑️ agreed by AilinKid.