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

[joechenrh]

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

[tiprow]

Hi @joechenrh. Thanks for your PR.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.0465%. Comparing base (0e3efb6) to head (d6dfc2f).
Report is 17 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #57506        +/-   ##
================================================
+ Coverage   72.8325%   73.0465%   +0.2139%     
================================================
  Files          1672       1676         +4     
  Lines        462833     467591      +4758     
================================================
+ Hits         337093     341559      +4466     
- Misses       104947     105287       +340     
+ Partials      20793      20745        -48     

Flag	Coverage Δ
integration	43.3050% <100.0000%> (?)
unit	72.2355% <100.0000%> (+0.0270%)	⬆️

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

Components	Coverage Δ
dumpling	52.7673% <ø> (ø)
parser	∅ <ø> (∅)
br	42.0090% <ø> (-3.0787%)	⬇️

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[joechenrh]

/ok-to-test

[joechenrh]

/retest

[joechenrh]

/retest

[joechenrh]

/retest

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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Needs approval from an approver in each of these files:

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

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-11-20 02:40:12.501711517 +0000 UTC m=+1015174.692580515: ☑️ agreed by tangenta.
• 2024-11-20 06:46:33.502491161 +0000 UTC m=+14181.122145676: ☑️ agreed by hawkingrei.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.5: #57549.