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feature: in-DB model serving and LLM builtins

ai-nativefeature to make tibd ai-nativefeature to make tibd ai-native

type/feature-requestCategorizes issue or PR as related to a new feature.Categorizes issue or PR as related to a new feature.

Status: Open.

#66599 In pingcap/tidb;

· BornChanger opened on Feb 28, 2026

TiKV Crash Bug: LIKE operator on BIT(58) type causes index out of bounds panic

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

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

#66597 In pingcap/tidb;

· transgene0302 opened on Feb 28, 2026

Non-UTF8 characters get mangled in statement_summary, slow_query, and logs

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.

type/enhancementThe issue or PR belongs to an enhancement.The issue or PR belongs to an enhancement.

Status: Open.

#66591 In pingcap/tidb;

· madhavramesh opened on Feb 28, 2026

Use native map instead of dolthub/swiss

type/enhancementThe issue or PR belongs to an enhancement.The issue or PR belongs to an enhancement.

Status: Open.

#66589 In pingcap/tidb;

· mjonss opened on Feb 28, 2026

planner: reject SELECT FOR UPDATE / FOR SHARE on mview and mlog tables

feature/developingthe related feature is in developmentthe related feature is in development

sig/transactionSIG:TransactionSIG:Transaction

type/new-feature

Status: Open.

#66588 In pingcap/tidb;

· wfxr opened on Feb 28, 2026

planner, statistics: plan cache is not invalidated after sync-load timeout fallback when stats become fully loaded

affects-8.5This bug affects the 8.5.x(LTS) versions.This bug affects the 8.5.x(LTS) versions.

component/statistics

severity/moderate

sig/plannerSIG: PlannerSIG: Planner

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

#66585 In pingcap/tidb;

· winoros opened on Feb 27, 2026

TTL manager can unexpectedly stop working when fair locking is enabled

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

Bug

#66581 In pingcap/tidb;

· ekexium opened on Feb 27, 2026

DROP STATS can take a lot of memory for heavily partitioned tables

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

#66580 In pingcap/tidb;

· mjonss opened on Feb 27, 2026

add API to remove some row key or index key to mock dangling row/index key case

type/enhancementThe issue or PR belongs to an enhancement.The issue or PR belongs to an enhancement.

Status: Open.

#66579 In pingcap/tidb;

· D3Hunter opened on Feb 27, 2026

ERROR 1062 (Duplicate entry) message is truncated for composite primary keys containing BINARY columns

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

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

#66578 In pingcap/tidb;

· cryo-zd opened on Feb 27, 2026

The query result of <code>INFORMATION_SCHEMA.SCHEMATA_EXTENSIONS</code> is incorrect

component/ddlThis issue is related to DDL of TiDB.This issue is related to DDL of TiDB.

severity/moderate

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

#66573 In pingcap/tidb;

· fzzf678 opened on Feb 27, 2026

Unexpected lock behavior for point get <code>FOR UPDATE</code> read on unique key

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

#66571 In pingcap/tidb;

· pcqz7 opened on Feb 27, 2026