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tidb: add the join order related variable tidb_opt_join_reorder_through_sel#21292

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Reminiscent wants to merge 5 commits intopingcap:masterfrom
Reminiscent:join_order_through_sel
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tidb: add the join order related variable tidb_opt_join_reorder_through_sel#21292
Reminiscent wants to merge 5 commits intopingcap:masterfrom
Reminiscent:join_order_through_sel

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@Reminiscent Reminiscent commented Jan 22, 2026 •
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First-time contributors' checklist

What is changed, added or deleted? (Required)

Related to the pingcap/tidb#64535 and pingcap/tidb#65742

Which TiDB version(s) do your changes apply to? (Required)

Tips for choosing the affected version(s):

By default, CHOOSE MASTER ONLY so your changes will be applied to the next TiDB major or minor releases. If your PR involves a product feature behavior change or a compatibility change, CHOOSE THE AFFECTED RELEASE BRANCH(ES) AND MASTER.

For details, see tips for choosing the affected versions (in Chinese).

  • master (the latest development version)
  • v9.0 (TiDB 9.0 versions)
  • v8.5 (TiDB 8.5 versions)
  • v8.1 (TiDB 8.1 versions)
  • v7.5 (TiDB 7.5 versions)
  • v7.1 (TiDB 7.1 versions)
  • v6.5 (TiDB 6.5 versions)
  • v6.1 (TiDB 6.1 versions)
  • v5.4 (TiDB 5.4 versions)

What is the related PR or file link(s)?

  • This PR is translated from:
  • Other reference link(s):

Do your changes match any of the following descriptions?

  • Delete files
  • Change aliases
  • Need modification after applied to another branch
  • Might cause conflicts after applied to another branch

@ti-chi-bot ti-chi-bot bot added missing-translation-status This PR does not have translation status info. size/S Denotes a PR that changes 10-29 lines, ignoring generated files. labels Jan 22, 2026
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ti-chi-bot commented Jan 23, 2026

@Reminiscent: once the present PR merges, I will cherry-pick it on top of release-8.5 in the new PR and assign it to you.

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/cherrypick release-8.5

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@hfxsd hfxsd added translation/doing This PR’s assignee is translating this PR. affects-9.0 This bug affects the 9.0.x versions. v9.0-beta.3 This PR/issue applies to TiDB v9.0-beta.3. and removed missing-translation-status This PR does not have translation status info. affects-9.0 This bug affects the 9.0.x versions. labels Feb 24, 2026
@hfxsd hfxsd self-assigned this Feb 24, 2026
@hfxsd hfxsd added the type/compatibility-or-feature-change This PR involves compatibility changes or feature behavior changes. label Feb 24, 2026
hfxsd
hfxsd reviewed Feb 24, 2026
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hfxsd reviewed Feb 24, 2026
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@hfxsd hfxsd added translation/done This PR has been translated from English into Chinese and updated to pingcap/docs-cn in a PR. and removed translation/doing This PR’s assignee is translating this PR. labels Feb 24, 2026
@hfxsd hfxsd mentioned this pull request Feb 24, 2026
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ti-chi-bot bot commented Feb 24, 2026

[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 ask for approval from hfxsd. For more information see the Code Review Process.
Please ensure that each of them provides their approval before proceeding.

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ti-chi-bot bot commented Feb 24, 2026

@guo-shaoge: adding LGTM is restricted to approvers and reviewers in OWNERS files.

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@hfxsd hfxsd requested a review from lilin90 February 24, 2026 06:59
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@guo-shaoge guo-shaoge guo-shaoge approved these changes

@lilin90 lilin90 Awaiting requested review from lilin90

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size/S Denotes a PR that changes 10-29 lines, ignoring generated files. translation/done This PR has been translated from English into Chinese and updated to pingcap/docs-cn in a PR. type/compatibility-or-feature-change This PR involves compatibility changes or feature behavior changes. v9.0-beta.3 This PR/issue applies to TiDB v9.0-beta.3.

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