expression: correct the erroneous scalar function equivalence check (#54067)

[ti-chi-bot]

This is an automated cherry-pick of #54067

What problem does this PR solve?

Issue Number: close #53726

Problem Summary:

What changed and how does it work?

when planer call RemoveUnnecessaryFirstRow. it will check the expression between Agg and GroupBy. but it doesn't check the return type. so it get wrong unnecessary FirstRow.

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

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (release-8.1@9246fff). Learn more about missing BASE report.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-8.1     #54121   +/-   ##
================================================
  Coverage               ?   71.1637%           
================================================
  Files                  ?       1465           
  Lines                  ?     421532           
  Branches               ?          0           
================================================
  Hits                   ?     299978           
  Misses                 ?     101059           
  Partials               ?      20495           

Flag	Coverage Δ
unit	71.1637% <100.0000%> (?)

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

Components	Coverage Δ
dumpling	53.9957% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	40.9671% <0.0000%> (?)

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-06-21 06:11:47.182304565 +0000 UTC m=+354433.667793397: ☑️ agreed by hawkingrei.
• 2024-06-21 06:14:20.911320432 +0000 UTC m=+354587.396809261: ☑️ agreed by qw4990.

[windtalker]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hawkingrei, qw4990, tangenta, windtalker

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• OWNERS [hawkingrei,qw4990,tangenta,windtalker]
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• pkg/parser/OWNERS [tangenta]

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