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planner: fix AccessPath.TableFilters got modified unexpectedly (#30966) #30978

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merged 4 commits into from
Apr 15, 2022

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@ti-srebot ti-srebot commented Dec 23, 2021

cherry-pick #30966 to release-5.2
You can switch your code base to this Pull Request by using git-extras:

# In tidb repo:
git pr https://github.com/pingcap/tidb/pull/30978

After apply modifications, you can push your change to this PR via:

git push git@github.com:ti-srebot/tidb.git pr/30978:release-5.2-e24493f411e6

What problem does this PR solve?

Issue Number: close #30965

Problem Summary:

SplitSelCondsWithVirtualColumn will modify the slice argument.

We pass AccessPath.TableFilters to SplitSelCondsWithVirtualColumn. This makes the following process of physical optimization generate wrong query plans.

What is changed and how it works?

SplitSelCondsWithVirtualColumn no longer modifies the argument slice. Now it returns two new slices.

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

None

Signed-off-by: ti-srebot <ti-srebot@pingcap.com>
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ti-chi-bot commented Dec 23, 2021

[REVIEW NOTIFICATION]

This pull request has been approved by:

  • Reminiscent
  • winoros

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After your PR has acquired the required number of LGTMs, you can assign this pull request to the committer in the list by filling /assign @committer in the comment to help you merge this pull request.

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@ti-chi-bot ti-chi-bot added do-not-merge/cherry-pick-not-approved do-not-merge/release-note-label-needed Indicates that a PR should not merge because it's missing one of the release note labels. labels Dec 23, 2021
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/run-all-tests

@ti-chi-bot ti-chi-bot added release-note-none Denotes a PR that doesn't merit a release note. and removed do-not-merge/release-note-label-needed Indicates that a PR should not merge because it's missing one of the release note labels. labels Dec 23, 2021
@ti-srebot ti-srebot added size/M Denotes a PR that changes 30-99 lines, ignoring generated files. type/5.2-cherry-pick labels Dec 23, 2021
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@time-and-fate you're already a collaborator in bot's repo.

@ti-chi-bot ti-chi-bot added size/L Denotes a PR that changes 100-499 lines, ignoring generated files. and removed size/M Denotes a PR that changes 30-99 lines, ignoring generated files. labels Dec 23, 2021
@VelocityLight VelocityLight added cherry-pick-approved Cherry pick PR approved by release team. and removed do-not-merge/cherry-pick-not-approved labels Apr 11, 2022
@ti-chi-bot ti-chi-bot added size/M Denotes a PR that changes 30-99 lines, ignoring generated files. and removed size/L Denotes a PR that changes 100-499 lines, ignoring generated files. labels Apr 11, 2022
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/run-unit-test

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sre-bot commented Apr 15, 2022

@ti-chi-bot ti-chi-bot added the status/LGT1 Indicates that a PR has LGTM 1. label Apr 15, 2022
@ti-chi-bot ti-chi-bot added status/LGT2 Indicates that a PR has LGTM 2. and removed status/LGT1 Indicates that a PR has LGTM 1. labels Apr 15, 2022
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winoros commented Apr 15, 2022

/merge

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This pull request has been accepted and is ready to merge.

Commit hash: ce38e49

@ti-chi-bot ti-chi-bot added the status/can-merge Indicates a PR has been approved by a committer. label Apr 15, 2022
@ti-chi-bot ti-chi-bot merged commit 340f544 into pingcap:release-5.2 Apr 15, 2022
@zhouqiang-cl zhouqiang-cl added this to the v5.2.4 milestone Apr 18, 2022
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