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sysvar: add INSTANCE scope for system variable #32888

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merged 27 commits into from
Mar 16, 2022
Merged

sysvar: add INSTANCE scope for system variable #32888

merged 27 commits into from
Mar 16, 2022

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CbcWestwolf
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@CbcWestwolf CbcWestwolf commented Mar 8, 2022 •
edited by morgo
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What problem does this PR solve?

Issue Number: ref #32887

Problem Summary:

What is changed and how it works?

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

TiDB now natively supports `INSTANCE` scoped system variables. `INSTANCE` scoped variables are similar to global variables, except their changes do not persist to the TiDB cluster.

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ti-chi-bot commented Mar 8, 2022 •
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[REVIEW NOTIFICATION]

This pull request has been approved by:

  • morgo
  • zimulala

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 release-note-none Denotes a PR that doesn't merit a release note. do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. size/L Denotes a PR that changes 100-499 lines, ignoring generated files. labels Mar 8, 2022
@morgo morgo self-requested a review March 8, 2022 15:37
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morgo reviewed Mar 8, 2022
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Looking good, just needs some work on tests.

@CbcWestwolf CbcWestwolf force-pushed the instance_scope_variables branch from 85ea157 to c0431f9 Compare March 10, 2022 01:38
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sre-bot commented Mar 10, 2022 •
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Code Coverage Details: https://codecov.io/github/pingcap/tidb/commit/ad21af5c6f4ff63bec68320ec03ca8b4fca75402

morgo
morgo reviewed Mar 10, 2022
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morgo commented Mar 10, 2022

Getting this error from the CI:

[2022-03-10T03:24:33.425Z] session/session_test.go:755:2: ineffectual assignment to err (ineffassign)
[2022-03-10T03:24:33.425Z] 	err = se.SetGlobalSysVar(varName, "ON")
[2022-03-10T03:24:33.425Z] 	^
[2022-03-10T03:24:33.425Z] session/session_test.go:762:2: ineffectual assignment to err (ineffassign)
[2022-03-10T03:24:33.425Z] 	err = se.SetGlobalSysVar(varName, defaultValue)
[2022-03-10T03:24:33.425Z] 	^

CbcWestwolf and others added 2 commits March 10, 2022 12:59
@CbcWestwolf @morgo
Update errno/errname.go
de3d119 
Co-authored-by: Morgan Tocker <tocker@gmail.com>
@CbcWestwolf
Repair the error in CI
0d13773
morgo
morgo reviewed Mar 10, 2022
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@CbcWestwolf CbcWestwolf marked this pull request as ready for review March 10, 2022 06:18
@CbcWestwolf CbcWestwolf requested a review from a team as a code owner March 10, 2022 06:18
@ti-chi-bot ti-chi-bot removed the do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. label Mar 10, 2022
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morgo commented Mar 10, 2022 •
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Please run make errdoc. This will fix the error reported by the CI check check_dev.

But otherwise LGTM!

@ti-chi-bot ti-chi-bot added release-note Denotes a PR that will be considered when it comes time to generate release notes. and removed release-note-none Denotes a PR that doesn't merit a release note. labels Mar 15, 2022
@ti-chi-bot ti-chi-bot added needs-rebase Indicates a PR cannot be merged because it has merge conflicts with HEAD. size/XXL Denotes a PR that changes 1000+ lines, ignoring generated files. and removed size/L Denotes a PR that changes 100-499 lines, ignoring generated files. labels Mar 15, 2022
@CbcWestwolf CbcWestwolf force-pushed the instance_scope_variables branch from f86df46 to 540e64b Compare March 15, 2022 09:08
@ti-chi-bot ti-chi-bot added size/L Denotes a PR that changes 100-499 lines, ignoring generated files. and removed size/XXL Denotes a PR that changes 1000+ lines, ignoring generated files. labels Mar 15, 2022
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/run-unit-test

zimulala
zimulala reviewed Mar 15, 2022
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session/session_test.go Outdated
@@ -764,6 +764,43 @@ func (s *testSessionSuite) TestUpgradeSysvars(c *C) {
c.Assert(v, Equals, "OFF") // the default value is restored.
}

func (s *testSessionSuite) TestSetInstanceSysvarBySetGlobalSysVar(c *C) {

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Suggested change

Please remove this blank line.

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zimulala approved these changes Mar 15, 2022
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LGTM

@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 Mar 15, 2022
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/merge

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

Commit hash: ecfe407

@ti-chi-bot ti-chi-bot added the status/can-merge Indicates a PR has been approved by a committer. label Mar 15, 2022
@ti-chi-bot ti-chi-bot removed the needs-rebase Indicates a PR cannot be merged because it has merge conflicts with HEAD. label Mar 15, 2022
@ti-chi-bot ti-chi-bot merged commit d981c0e into pingcap:master Mar 16, 2022
@CbcWestwolf CbcWestwolf deleted the instance_scope_variables branch March 16, 2022 06:12
@morgo morgo mentioned this pull request Mar 22, 2022
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@morgo morgo mentioned this pull request Mar 29, 2022
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