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reduce and observe modify-column pre-check SELECT

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

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

Status: Open.

#68013 In pingcap/tidb;

· joechenrh opened on Apr 24, 2026

Flaky test: TestGlobalMemoryControlForPrepareAnalyze in pkg/executor/test/analyzetest/memorycontrol

component/test

flaky-test

severity/critical

Status: Open.

Task

#68012 In pingcap/tidb;

· ti-chi-bot opened on Apr 24, 2026

Update Code Review Guide

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

Status: Open.

#68009 In pingcap/tidb;

· henrybw opened on Apr 23, 2026

docs: typos in design documents (enviroment, seperate, neccessary)

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.

Status: Open.

#68008 In pingcap/tidb;

· SAY-5 opened on Apr 23, 2026

UnionScan returns wrong result for ORDER BY virtual generated column with LIMIT through IndexLookUp

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

Status: Open.

#68003 In pingcap/tidb;

· lilinghai opened on Apr 23, 2026

statistics: TestDropPartitionStats can hit cleanup timeout in CI due to unclosed internal RecordSet

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

Status: Open.

#67999 In pingcap/tidb;

· expxiaoli opened on Apr 23, 2026

ADMIN RECOVER INDEX panics when recovering an index built on a stored generated column

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

Status: Open.

#67995 In pingcap/tidb;

· lilinghai opened on Apr 23, 2026

UnionScan returns wrong results for unsigned virtual generated columns in transaction-local reads

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

Status: Open.

#67991 In pingcap/tidb;

· lilinghai opened on Apr 23, 2026

planner, executor: extend ordered-input optimization to general window functions

component/test

sig/plannerSIG: PlannerSIG: Planner

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

Status: Open.

#67989 In pingcap/tidb;

· hawkingrei opened on Apr 23, 2026

support rewrite SQL to remove aggregation for distinct when there is a UNION in SQL

plan-rewrite

report/customerCustomers have encountered this bug.Customers have encountered this bug.

sig/plannerSIG: PlannerSIG: Planner

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

Status: Open.

#67986 In pingcap/tidb;

· guo-shaoge opened on Apr 23, 2026

TopN is incorrectly pushed to IndexLookUp probe side for ORDER BY virtual generated column on expression index

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

Status: Open.

#67981 In pingcap/tidb;

· lilinghai opened on Apr 23, 2026

Flaky test: TestAddIndexTriggerAutoAnalyze in pkg/statistics/handle/autoanalyze/priorityqueue

component/test

flaky-test

severity/critical

Status: Open.

Task

#67980 In pingcap/tidb;

· ti-chi-bot opened on Apr 23, 2026