Issues

• Get incorrect result when querying cluster_statements_summary table

  may-affects-7.5may-affects-8.1may-affects-8.5may-affects-25.10may-affects-26.3may-affects-26.9severity/majorsig/diagnosistype/bug
  pingcap/tidb#71913 · Filter by author xzhangxian1008 opened on Oct 12, 2026
  5

• DXF/fast-reorg ADD INDEX: the job worker on the current DDL owner gets stuck inside a disttask wait point — cancel has no effect and the wait point has no timeout, requiring a TiDB restart to finish

  component/ddlcontributionmay-affects-7.5may-affects-8.1may-affects-8.5may-affects-25.10may-affects-26.3may-affects-26.9severity/majortype/bug
  pingcap/tidb#71911 · Filter by author WalterWj opened on Oct 12, 2026
  2

• UNION silently truncates values cast to string: the length estimated from one child is applied to all children

  contribution
  pingcap/tidb#71906 · Filter by author moonsphere opened on Oct 12, 2026
  1

• information_schema.COLUMNS LIKE filters omit column names containing newlines

  component/infoschemacontributionseverity/moderatetype/bug
  pingcap/tidb#71897 · Filter by author idle-lab opened on Oct 12, 2026
  2

• INSERT IGNORE ... ON DUPLICATE KEY UPDATE / UPDATE IGNORE setting a NOT NULL column to NULL leaves a NULL entry in the index of a dependent virtual generated column

  contributionmay-affects-7.5may-affects-8.1may-affects-8.5may-affects-25.10may-affects-26.3may-affects-26.9severity/criticalsig/executiontype/bug
  pingcap/tidb#71894 · Filter by author AnnCalla opened on Oct 12, 2026
  2

• "Data is corrupted, missing data for NOT NULL column" from coprocessor table range scan; a plain SELECT reads the same rows

  component/tikvcontributionmay-affects-7.5may-affects-8.1may-affects-8.5may-affects-25.10may-affects-26.3may-affects-26.9severity/majortype/bug
  pingcap/tidb#71893 · Filter by author AnnCalla opened on Oct 12, 2026
  2

• planner: "Can't find column ... in schema Column" for derived table filtering a BLOB column against its indexed virtual copy

  contributionseverity/moderatesig/plannertype/bug
  pingcap/tidb#71892 · Filter by author AnnCalla opened on Oct 12, 2026
  2

• Wrong result: predicate CAST(-x AS DATE) NOT LIKE 11 is NULL in projection but treated as true when pushed down to TiKV

  component/tikvcontributionmay-affects-7.5may-affects-8.1may-affects-8.5may-affects-25.10may-affects-26.3may-affects-26.9severity/criticaltype/bug
  pingcap/tidb#71891 · Filter by author AnnCalla opened on Oct 12, 2026
  2

• store/copr: ADMIN CHECK multi-valued indexes can route duplicate row ranges to the wrong Region

  affects-26.9component/executorcomponent/storeimpact/func-failuremay-affects-7.5may-affects-8.1may-affects-8.5may-affects-25.10may-affects-26.3nextgenseverity/majortype/bug
  pingcap/tidb#71889 · Filter by author lcwangchao opened on Oct 12, 2026
  

• planner: index join with MIN/MAX on the inner side reads every row of each group

  sig/plannertype/enhancement
  pingcap/tidb#71883 · Filter by author terry1purcell opened on Oct 11, 2026

• Support RECOMMEND INDEX RETURN RESULT FOR statement

  type/feature-request
  pingcap/tidb#71875 · Filter by author xzhangxian1008 opened on Oct 10, 2026

• information_schema: some tables do not reflect uncommitted changes made in the same transaction

  contributionseverity/moderatesig/sql-infratype/bug
  pingcap/tidb#71871 · Filter by author idle-lab opened on Oct 10, 2026
  3

• METRICS_SCHEMA queries can mix metrics from multiple clusters when using a shared Prometheus

  type/enhancement
  pingcap/tidb#71870 · Filter by author mayjiang0203 opened on Oct 10, 2026

• Flaky test: TestImportInto/TestGlobalSortConflictResolutionBasicCases in tests/realtikvtest/importintotest4

  component/testflaky-testtype/enhancement
  pingcap/tidb#71868 · Filter by author ti-chi-bot opened on Oct 10, 2026

• Flaky test: TestDecodeBinaryPlan in pkg/planner/core/casetest/binaryplan

  component/testflaky-testtype/enhancement
  pingcap/tidb#71867 · Filter by author ti-chi-bot opened on Oct 10, 2026

• executor: parallel Apply cache misses when duplicate correlated values reach workers at the same time

  type/enhancement
  pingcap/tidb#71860 · Filter by author terry1purcell opened on Oct 9, 2026

• Escaped key parser silently ignores invalid \x hex escapes and yields a wrong key

  contributionfirst-time-contributor
  pingcap/tidb#71859 · Filter by author MAHIR-BABBAR opened on Oct 9, 2026
  1

• br: credentials can leak into logs via multiple paths (SessionToken, URL errors, master-key, Azure flags, checkpoint URL)

  component/brseverity/moderatetype/bug
  pingcap/tidb#71858 · Filter by author pingyu opened on Oct 9, 2026
  5

• executor: idle connections retain previous statement text in CacheStmtExecInfo.PrevSQL since v8.5

  affects-8.5affects-25.10affects-26.3affects-26.9component/executorseverity/majortype/bug
  pingcap/tidb#71856 · Filter by author tiancaiamao opened on Oct 9, 2026
  1

• store/copr: start the paging pre-charge EMA at 0 when tidb_paging_size_bytes is set

  type/enhancement
  pingcap/tidb#71832 · Filter by author JmPotato opened on Oct 8, 2026

• planner: non prepared plan cache doesn't support multi-statements

  affects-8.5report/customersig/plannertype/enhancement
  pingcap/tidb#71827 · Filter by author qw4990 opened on Oct 8, 2026

• ddl: DXF ADD INDEX stays pending when multi-ingest check dials a tiup-stopped TiKV

  component/ddlcontributionseverity/majortype/bug
  pingcap/tidb#71824 · Filter by author circle006 opened on Oct 8, 2026
  2

  

• dxf: scheduler and balancer evict running subtasks of low-ranking tasks even when idle nodes exist

  component/DXFtype/enhancement
  pingcap/tidb#71823 · Filter by author joechenrh opened on Oct 8, 2026

• executor: improve CALIBRATE RESOURCE accuracy for I/O-bound workloads

  type/enhancement
  pingcap/tidb#71821 · Filter by author mayjiang0203 opened on Oct 8, 2026
  2

• stmtsummary: reduce per-line JSON decode cost of persistent history reads

  component/observabilitytype/enhancement
  pingcap/tidb#71814 · Filter by author jiong-nba opened on Oct 8, 2026
  5