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planner: fix incorrectly using the schema for plan cache (#57964) #58093

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This is an automated cherry-pick of #57964

What problem does this PR solve?

Issue Number: close #56733

Problem Summary:
If the table ID is changed for a given table name, the plan cache key is not updated.
For an insert statement, it may use the outdated schema, resulting in incorrect data or query results.

What changed and how does it work?

Make sure the tbl is updated in function planCachePreprocess() if tableByID doesn't return the table info.

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.

fix incorrectly using the schema for plan cache

@ti-chi-bot ti-chi-bot added release-note Denotes a PR that will be considered when it comes time to generate release notes. sig/planner SIG: Planner size/L Denotes a PR that changes 100-499 lines, ignoring generated files. type/cherry-pick-for-release-8.1 This PR is cherry-picked to release-8.1 from a source PR. labels Dec 9, 2024
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ti-chi-bot bot commented Dec 9, 2024

This cherry pick PR is for a release branch and has not yet been approved by triage owners.
Adding the do-not-merge/cherry-pick-not-approved label.

To merge this cherry pick:

  1. It must be approved by the approvers firstly.
  2. AFTER it has been approved by approvers, please wait for the cherry-pick merging approval from triage owners.

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ti-chi-bot bot commented Dec 9, 2024

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please assign qw4990, tangenta for approval, ensuring that each of them provides their approval before proceeding. For more information see the Code Review Process.

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ti-chi-bot bot commented Dec 9, 2024

@ti-chi-bot: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name Commit Details Required Rerun command
idc-jenkins-ci-tidb/build be0ea47 link true /test build
idc-jenkins-ci-tidb/check_dev_2 be0ea47 link true /test check-dev2
idc-jenkins-ci-tidb/mysql-test be0ea47 link true /test mysql-test
idc-jenkins-ci-tidb/check_dev be0ea47 link true /test check-dev
idc-jenkins-ci-tidb/unit-test be0ea47 link true /test unit-test

Full PR test history. Your PR dashboard.

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do-not-merge/cherry-pick-not-approved release-note Denotes a PR that will be considered when it comes time to generate release notes. sig/planner SIG: Planner size/L Denotes a PR that changes 100-499 lines, ignoring generated files. type/cherry-pick-for-release-8.1 This PR is cherry-picked to release-8.1 from a source PR.
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