planner: fix count(*) return wrong value for information_schema.tables (#57506)

[ti-chi-bot]

This is an automated cherry-pick of #57506

What problem does this PR solve?

Issue Number: close #56987

Problem Summary:

InfoSchemaBaseExtractor wrongly filter table names for the fast path introduced by #55574

What changed and how does it work?

Introduce a new variable extractLowerString to dertermine whether to do case-insensitive comparisons for specific columns.

Test case is not added in integration test because we don't want to write some hardcoded value. (ref #57306)

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

[Benjamin2037]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Benjamin2037, hawkingrei

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• OWNERS [Benjamin2037,hawkingrei]
• pkg/planner/OWNERS [hawkingrei]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-11-20 08:02:09.491580771 +0000 UTC m=+18717.111235287: ☑️ agreed by Benjamin2037.
• 2024-11-20 08:02:20.093808079 +0000 UTC m=+18727.713462595: ☑️ agreed by hawkingrei.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (release-8.5@03a5897). Learn more about missing BASE report.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-8.5     #57549   +/-   ##
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  Misses                 ?     246236           
  Partials               ?      24057           

Flag	Coverage Δ
integration	36.6959% <100.0000%> (?)
unit	72.5106% <100.0000%> (?)

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

Components	Coverage Δ
dumpling	52.9478% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	52.3160% <0.0000%> (?)

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[joechenrh]

/retest