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planner: add optimizer cost factors

do-not-merge/holdIndicates that a PR should not merge because someone has issued a /hold command.Indicates that a PR should not merge because someone has issued a /hold command.

needs-cherry-pick-release-8.5Should cherry pick this PR to release-8.5 branch.Should cherry pick this PR to release-8.5 branch.

size/LDenotes a PR that changes 100-499 lines, ignoring generated files.Denotes a PR that changes 100-499 lines, ignoring generated files.

translation/from-docsThis PR is translated from a PR in pingcap/docs.This PR is translated from a PR in pingcap/docs.

type/compatibility-or-feature-changeThis PR involves compatibility changes or feature behavior changes.This PR involves compatibility changes or feature behavior changes.

v9.0-beta.2This PR/issue applies to TiDB v9.0-beta.2.This PR/issue applies to TiDB v9.0-beta.2.

Status: Open (in progress).

pingcap/docs-cnnumber 20667

#20667 In pingcap/docs-cn;

· Oreoxmt opened on Jul 16, 2025

Update SHOW BUILTINS output

for-releaseThis PR relates to a TiDB release but does not have a tracked feature.This PR relates to a TiDB release but does not have a tracked feature.

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size/XSDenotes a PR that changes 0-9 lines, ignoring generated files.Denotes a PR that changes 0-9 lines, ignoring generated files.

translation/from-docsThis PR is translated from a PR in pingcap/docs.This PR is translated from a PR in pingcap/docs.

v9.0-beta.2This PR/issue applies to TiDB v9.0-beta.2.This PR/issue applies to TiDB v9.0-beta.2.

Status: Open (in progress).

pingcap/docs-cnnumber 20578

#20578 In pingcap/docs-cn;

· qiancai opened on Jun 30, 2025

tiflash: Add new configs introduce on v9.0.0-beta.2

size/MDenotes a PR that changes 30-99 lines, ignoring generated files.Denotes a PR that changes 30-99 lines, ignoring generated files.

translation/doneThis PR has been translated from English into Chinese and updated to pingcap/docs-cn in a PR.This PR has been translated from English into Chinese and updated to pingcap/docs-cn in a PR.

v9.0-beta.2This PR/issue applies to TiDB v9.0-beta.2.This PR/issue applies to TiDB v9.0-beta.2.

Status: Open (in progress).

pingcap/docs-cnnumber 20574

#20574 In pingcap/docs-cn;

· JaySon-Huang opened on Jun 27, 2025

br: pitr restore mode

needs-1-more-lgtmIndicates a PR needs 1 more LGTM.Indicates a PR needs 1 more LGTM.

size/XSDenotes a PR that changes 0-9 lines, ignoring generated files.Denotes a PR that changes 0-9 lines, ignoring generated files.

translation/doneThis PR has been translated from English into Chinese and updated to pingcap/docs-cn in a PR.This PR has been translated from English into Chinese and updated to pingcap/docs-cn in a PR.

v9.0-beta.2This PR/issue applies to TiDB v9.0-beta.2.This PR/issue applies to TiDB v9.0-beta.2.

Status: Open (in progress).

pingcap/docs-cnnumber 20559

#20559 In pingcap/docs-cn;

· Leavrth opened on Jun 26, 2025

charset: update deal with invalid utf8 characters

do-not-merge/holdIndicates that a PR should not merge because someone has issued a /hold command.Indicates that a PR should not merge because someone has issued a /hold command.

for-releaseThis PR relates to a TiDB release but does not have a tracked feature.This PR relates to a TiDB release but does not have a tracked feature.

size/SDenotes a PR that changes 10-29 lines, ignoring generated files.Denotes a PR that changes 10-29 lines, ignoring generated files.

translation/doingThis PR’s assignee is translating this PR.This PR’s assignee is translating this PR.

v9.0-beta.2This PR/issue applies to TiDB v9.0-beta.2.This PR/issue applies to TiDB v9.0-beta.2.

Status: Open (in progress).

pingcap/docs-cnnumber 20555

#20555 In pingcap/docs-cn;

· Defined2014 opened on Jun 25, 2025

import into: auto detect data source format

contributionThis PR is from a community contributor.This PR is from a community contributor.

first-time-contributorIndicates that the PR was contributed by an external member and is a first-time contributor.Indicates that the PR was contributed by an external member and is a first-time contributor.

for-releaseThis PR relates to a TiDB release but does not have a tracked feature.This PR relates to a TiDB release but does not have a tracked feature.

needs-ok-to-testIndicates a PR created by contributors and need ORG member send '/ok-to-test' to start testing.Indicates a PR created by contributors and need ORG member send '/ok-to-test' to start testing.

size/XSDenotes a PR that changes 0-9 lines, ignoring generated files.Denotes a PR that changes 0-9 lines, ignoring generated files.

translation/doneThis PR has been translated from English into Chinese and updated to pingcap/docs-cn in a PR.This PR has been translated from English into Chinese and updated to pingcap/docs-cn in a PR.

v9.0-beta.2This PR/issue applies to TiDB v9.0-beta.2.This PR/issue applies to TiDB v9.0-beta.2.

Status: Open (in progress).

pingcap/docs-cnnumber 20496

#20496 In pingcap/docs-cn;

· River2000i opened on Jun 11, 2025

ticdc: add header line for CSV protocol

area/ticdcIndicates that the Issue or PR belongs to the area of TiCDC.Indicates that the Issue or PR belongs to the area of TiCDC.

for-releaseThis PR relates to a TiDB release but does not have a tracked feature.This PR relates to a TiDB release but does not have a tracked feature.

needs-1-more-lgtmIndicates a PR needs 1 more LGTM.Indicates a PR needs 1 more LGTM.

size/SDenotes a PR that changes 10-29 lines, ignoring generated files.Denotes a PR that changes 10-29 lines, ignoring generated files.

translation/doingThis PR’s assignee is translating this PR.This PR’s assignee is translating this PR.

v9.0-beta.2This PR/issue applies to TiDB v9.0-beta.2.This PR/issue applies to TiDB v9.0-beta.2.

Status: Open (in progress).

pingcap/docs-cnnumber 20478

#20478 In pingcap/docs-cn;

· wk989898 opened on Jun 10, 2025

planner: add new cascades planner document.

size/XSDenotes a PR that changes 0-9 lines, ignoring generated files.Denotes a PR that changes 0-9 lines, ignoring generated files.

translation/doingThis PR’s assignee is translating this PR.This PR’s assignee is translating this PR.

v9.0-beta.2This PR/issue applies to TiDB v9.0-beta.2.This PR/issue applies to TiDB v9.0-beta.2.

Status: Open (in progress).

pingcap/docs-cnnumber 20470

#20470 In pingcap/docs-cn;

· AilinKid opened on Jun 5, 2025

v9.0.0 release notes: add new features (v9.0-beta.2)

do-not-merge/holdIndicates that a PR should not merge because someone has issued a /hold command.Indicates that a PR should not merge because someone has issued a /hold command.

needs-1-more-lgtmIndicates a PR needs 1 more LGTM.Indicates a PR needs 1 more LGTM.

size/LDenotes a PR that changes 100-499 lines, ignoring generated files.Denotes a PR that changes 100-499 lines, ignoring generated files.

translation/doingThis PR’s assignee is translating this PR.This PR’s assignee is translating this PR.

v9.0-beta.2This PR/issue applies to TiDB v9.0-beta.2.This PR/issue applies to TiDB v9.0-beta.2.

Status: Open (in progress).

pingcap/docs-cnnumber 20468

#20468 In pingcap/docs-cn;

· Oreoxmt opened on Jun 5, 2025

log backup: update metafile format

area/brIndicates that the Issue or PR belongs to the area of BR (Backup & Restore).Indicates that the Issue or PR belongs to the area of BR (Backup & Restore).

for-releaseThis PR relates to a TiDB release but does not have a tracked feature.This PR relates to a TiDB release but does not have a tracked feature.

needs-1-more-lgtmIndicates a PR needs 1 more LGTM.Indicates a PR needs 1 more LGTM.

size/SDenotes a PR that changes 10-29 lines, ignoring generated files.Denotes a PR that changes 10-29 lines, ignoring generated files.

translation/doingThis PR’s assignee is translating this PR.This PR’s assignee is translating this PR.

v9.0-beta.2This PR/issue applies to TiDB v9.0-beta.2.This PR/issue applies to TiDB v9.0-beta.2.

Status: Open (in progress).

pingcap/docs-cnnumber 20455

#20455 In pingcap/docs-cn;

· 3pointer opened on Jun 4, 2025

br: pitr filter feature release doc

do-not-merge/holdIndicates that a PR should not merge because someone has issued a /hold command.Indicates that a PR should not merge because someone has issued a /hold command.

lgtm

size/LDenotes a PR that changes 100-499 lines, ignoring generated files.Denotes a PR that changes 100-499 lines, ignoring generated files.

translation/from-docsThis PR is translated from a PR in pingcap/docs.This PR is translated from a PR in pingcap/docs.

v9.0-beta.2This PR/issue applies to TiDB v9.0-beta.2.This PR/issue applies to TiDB v9.0-beta.2.

Status: Open (in progress).

pingcap/docs-cnnumber 20450

#20450 In pingcap/docs-cn;

· Tristan1900 opened on Jun 3, 2025

br: add restore registry table in mysql

for-releaseThis PR relates to a TiDB release but does not have a tracked feature.This PR relates to a TiDB release but does not have a tracked feature.

needs-1-more-lgtmIndicates a PR needs 1 more LGTM.Indicates a PR needs 1 more LGTM.

size/XSDenotes a PR that changes 0-9 lines, ignoring generated files.Denotes a PR that changes 0-9 lines, ignoring generated files.

translation/doneThis PR has been translated from English into Chinese and updated to pingcap/docs-cn in a PR.This PR has been translated from English into Chinese and updated to pingcap/docs-cn in a PR.

v9.0-beta.2This PR/issue applies to TiDB v9.0-beta.2.This PR/issue applies to TiDB v9.0-beta.2.

Status: Open (in progress).

pingcap/docs-cnnumber 20438

#20438 In pingcap/docs-cn;

· Tristan1900 opened on Jun 2, 2025