planner: refine tryToGetIndexJoin (#45587)

[ti-chi-bot]

This is an automated cherry-pick of #45587

What problem does this PR solve?

Issue Number: ref #45520

Problem Summary: planner: refine tryToGetIndexJoin

What is changed and how it works?

planner: refine tryToGetIndexJoin

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

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

[qw4990]

/test all

[tiprow]

@qw4990: No presubmit jobs available for pingcap/tidb@release-6.5

In response to this:

/test all

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[hawkingrei]

/test all

[tiprow]

@hawkingrei: No presubmit jobs available for pingcap/tidb@release-6.5

In response to this:

/test all

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hawkingrei, time-and-fate

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-08-01 07:28:16.972338882 +0000 UTC m=+170380.914687408: ☑️ agreed by time-and-fate.
• 2023-08-01 07:39:45.652878414 +0000 UTC m=+171069.595226932: ☑️ agreed by hawkingrei.

[hawkingrei]

/retest

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (release-6.5@05d7505). Click here to learn what that means.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-6.5     #45712   +/-   ##
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  Coverage               ?   73.6987%           
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  Files                  ?       1082           
  Lines                  ?     347212           
  Branches               ?          0           
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  Hits                   ?     255891           
  Misses                 ?      74902           
  Partials               ?      16419           

[hawkingrei]

/retest