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planner: update the plan cache strategy when expressions with parameters affect null-check (#40218) #40476

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merged 10 commits into from
Jan 17, 2023
Merged

planner: update the plan cache strategy when expressions with parameters affect null-check (#40218) #40476

merged 10 commits into from
Jan 17, 2023

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This is an automated cherry-pick of #40218

What problem does this PR solve?

Issue Number: close #40093, close #38205

Problem Summary: planner: update the plan cache strategy when expressions with parameters affect null-check

What is changed and how it works?

When expressions with parameters affect null-check, process null-check and skip plan-cache instead of skipping the null-check and caching a sub-optimal plan.

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 @ti-chi-bot
This is an automated cherry-pick of pingcap#40218
6cfc0ff 
Signed-off-by: ti-chi-bot <ti-community-prow-bot@tidb.io>
@ti-chi-bot ti-chi-bot mentioned this pull request Jan 10, 2023
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ti-chi-bot commented Jan 10, 2023 •
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[REVIEW NOTIFICATION]

This pull request has been approved by:

  • chrysan
  • fzzf678

To complete the pull request process, please ask the reviewers in the list to review by filling /cc @reviewer in the comment.
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 epic/plan-cache release-note-none Denotes a PR that doesn't merit a release note. sig/planner SIG: Planner size/L Denotes a PR that changes 100-499 lines, ignoring generated files. type/cherry-pick-for-release-6.1 This PR is cherry-picked to release-6.1 from a source PR. do-not-merge/cherry-pick-not-approved labels Jan 10, 2023
@VelocityLight VelocityLight added cherry-pick-approved Cherry pick PR approved by release team. and removed do-not-merge/cherry-pick-not-approved labels Jan 10, 2023
@ti-chi-bot ti-chi-bot added size/XL Denotes a PR that changes 500-999 lines, ignoring generated files. and removed size/L Denotes a PR that changes 100-499 lines, ignoring generated files. labels Jan 10, 2023
@ti-chi-bot ti-chi-bot added the status/LGT1 Indicates that a PR has LGTM 1. label Jan 10, 2023
@chrysan chrysan requested a review from qw4990 January 10, 2023 13:27
@ti-chi-bot ti-chi-bot added size/M Denotes a PR that changes 30-99 lines, ignoring generated files. and removed size/XL Denotes a PR that changes 500-999 lines, ignoring generated files. labels Jan 16, 2023
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qw4990 commented Jan 16, 2023

/test unit-test

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qw4990 reviewed Jan 16, 2023
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executor/stale_txn_test.go
@@ -533,19 +533,23 @@ func TestStalenessTransactionSchemaVer(t *testing.T) {
tk.MustExec("alter table t add c int")

// confirm schema changed
time.Sleep(time.Millisecond * 20)
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Fix the unstable test.

@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 Jan 16, 2023
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qw4990 commented Jan 17, 2023

/test unit-test

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qw4990 commented Jan 17, 2023

/merge

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

Commit hash: e673803

@ti-chi-bot ti-chi-bot added the status/can-merge Indicates a PR has been approved by a committer. label Jan 17, 2023
@ti-chi-bot ti-chi-bot merged commit 4504bc3 into pingcap:release-6.1 Jan 17, 2023
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@qw4990 qw4990 qw4990 left review comments

@chrysan chrysan chrysan approved these changes

@fzzf678 fzzf678 fzzf678 approved these changes

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cherry-pick-approved Cherry pick PR approved by release team. epic/plan-cache release-note-none Denotes a PR that doesn't merit a release note. sig/planner SIG: Planner size/M Denotes a PR that changes 30-99 lines, ignoring generated files. status/can-merge Indicates a PR has been approved by a committer. status/LGT2 Indicates that a PR has LGTM 2. type/cherry-pick-for-release-6.1 This PR is cherry-picked to release-6.1 from a source PR.
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@ti-chi-bot @qw4990 @chrysan @fzzf678 @VelocityLight @Ivy-YinSu