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*: lower-case-table-names should be removed from tidb-config #32886

Merged
merged 5 commits into from
Mar 18, 2022
Merged

*: lower-case-table-names should be removed from tidb-config #32886

merged 5 commits into from
Mar 18, 2022

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morgo
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@morgo morgo commented Mar 7, 2022

What problem does this PR solve?

Issue Number: close #32885

Problem Summary:

lower-case-tables-names should not be in configuration.

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

The configuration option `lower-case-table-names` has no effect in TiDB. It has been removed from configuration.

@morgo morgo requested a review from a team as a code owner March 7, 2022 16:52
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ti-chi-bot commented Mar 7, 2022 •
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[REVIEW NOTIFICATION]

This pull request has been approved by:

  • bb7133
  • xiongjiwei

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@ti-chi-bot ti-chi-bot added release-note Denotes a PR that will be considered when it comes time to generate release notes. size/M Denotes a PR that changes 30-99 lines, ignoring generated files. labels Mar 7, 2022
@morgo morgo changed the title *: lower-case-table-names is a noop *: lower-case-table-names should be removed from tidb-config Mar 7, 2022
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sre-bot commented Mar 7, 2022 •
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Code Coverage Details: https://codecov.io/github/pingcap/tidb/commit/4f2bd4c2173fec63bfe9611b508163db48169450

@morgo morgo requested a review from bb7133 March 9, 2022 02:40
@ti-chi-bot ti-chi-bot added the status/LGT1 Indicates that a PR has LGTM 1. label Mar 10, 2022
@xiongjiwei xiongjiwei added the compatibility-breaker Violation of forwards/backwards compatibility in a design-time piece. label Mar 10, 2022
bb7133
bb7133 reviewed Mar 10, 2022
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executor/brie.go
@@ -285,9 +285,9 @@ func (b *executorBuilder) buildBRIE(s *ast.BRIEStmt, schema *expression.Schema)
cfg.TableFilter = filter.All()
}

if tidbCfg.LowerCaseTableNames != 0 {
cfg.TableFilter = filter.CaseInsensitive(cfg.TableFilter)
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I'm not sure if this is fine because I'm not familiar with BR(IMHO it's OK since BR in SQL is barely used for now?)

PTAL @3pointer

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It looks like it is used to specify if the tablefilter should act case insensitive. I just changed it to always be case insensitive, which looks like the correct behavior anyway.

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LGTM, I think it's okay to always be case insensitive. since we only support case insensitive in tidb.

@morgo morgo requested a review from bb7133 March 16, 2022 02:23
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bb7133 approved these changes Mar 17, 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 17, 2022
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morgo commented Mar 17, 2022

/merge

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

Commit hash: ae3abd0

@ti-chi-bot ti-chi-bot added the status/can-merge Indicates a PR has been approved by a committer. label Mar 17, 2022
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morgo commented Mar 17, 2022

/run-unit-test

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morgo commented Mar 18, 2022

/run-all-tests

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/run-all-tests

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@morgo: Your PR was out of date, I have automatically updated it for you.

At the same time I will also trigger all tests for you:

/run-all-tests

If the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

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/run-unit-test

@ti-chi-bot ti-chi-bot merged commit 7291238 into pingcap:master Mar 18, 2022
@morgo morgo deleted the lower-case-table-names branch May 26, 2022 14:08
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@bb7133 bb7133 bb7133 approved these changes

@xiongjiwei xiongjiwei xiongjiwei approved these changes

@3pointer 3pointer Awaiting requested review from 3pointer

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Don't pretend lower_case_table_names is changable
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@morgo @ti-chi-bot @sre-bot @hawkingrei @bb7133 @3pointer @xiongjiwei