executor: fix query panic on INFORMATION_SCHEMA.CLUSTER_SLOW_QUERY with some slow query files

[tiancaiamao]

What problem does this PR solve?

Issue Number: close #54324

Problem Summary:

What changed and how does it work?

The old code does not handle all the cases well. if i >= len(lines)-1 should be a typo, it should be something like if i >= len(chars)-1 And the simplified logic is just the same as this PR.

Check List

Tests

• [X] 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[bot]]

Hi @tiancaiamao. Thanks for your PR.

PRs from untrusted users cannot be marked as trusted with /ok-to-test in this repo meaning untrusted PR authors can never trigger tests themselves. Collaborators can still trigger tests on the PR using /test all.

I understand the commands that are listed here.

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-sigs/prow repository.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 56.3452%. Comparing base (80c2218) to head (be1d3ec). Report is 925 commits behind head on master.

Additional details and impacted files

@@                Coverage Diff                @@
##             master     #54325         +/-   ##
=================================================
- Coverage   72.7965%   56.3452%   -16.4513%     
=================================================
  Files          1526       1652        +126     
  Lines        435900     610279     +174379     
=================================================
+ Hits         317320     343863      +26543     
- Misses        98931     243183     +144252     
- Partials      19649      23233       +3584     

Flag	Coverage Δ
integration	37.5014% <0.0000%> (?)
unit	72.1153% <100.0000%> (+0.3229%)	:arrow_up:

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

Components	Coverage Δ
dumpling	52.9656% <ø> (ø)
parser	∅ <ø> (∅)
br	52.7254% <ø> (+6.6106%)	:arrow_up:

[ti-chi-bot[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: crazycs520, Defined2014

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• ~~OWNERS~~ [Defined2014,crazycs520]

Approvers can indicate their approval by writing /approve in a comment Approvers can cancel approval by writing /approve cancel in a comment

[ti-chi-bot[bot]]

[LGTM Timeline notifier]

Timeline:

• 2024-06-28 17:26:19.938547655 +0000 UTC m=+999706.424036487: :ballot_box_with_check: agreed by crazycs520.
• 2024-07-01 06:42:08.985063218 +0000 UTC m=+1220255.470552049: :ballot_box_with_check: agreed by Defined2014.

[Defined2014]

/run-check-issue-triage-complete

[tiancaiamao]

/test unit-test

[tiprow[bot]]

@tiancaiamao: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/test unit-test

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-sigs/prow repository.

[tiancaiamao]

/retest-required

[tiprow[bot]]

@tiancaiamao: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest-required

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-sigs/prow repository.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.1: #54710.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #54711.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-6.5: #54935.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.1: #56899.