Issues

• executor: TopN as inner child of an Apply join retains per-reopen scaffolding memory in the MemTracker action chain (untracked, can OOM)

  affects-8.5affects-26.3component/executormay-affects-7.5may-affects-8.1may-affects-25.10may-affects-26.9report/customerseverity/majortype/bug
  pingcap/tidb#72234 · Filter by author time-and-fate opened on Oct 23, 2026
  1

• executor: INSERT duplicate checks trigger failing Lite ResolveLock cleanup

  component/tikv-clientmay-affects-8.5severity/moderatetype/bug
  pingcap/tidb#72231 · Filter by author lcwangchao opened on Oct 23, 2026

• DXF ADD INDEX: getRangeSplitter() reads DDL owner node's memory spec instead of executor nodes

  component/ddlcontributionmay-affects-7.5may-affects-8.1may-affects-8.5may-affects-25.10may-affects-26.3may-affects-26.9severity/majortype/bug
  pingcap/tidb#72230 · Filter by author AricSu opened on Oct 23, 2026
  2

• DXF ADD INDEX: adjustConcurrency() ignores task scope when selecting node for CPU count

  component/ddlcontributionseverity/moderatetype/bug
  pingcap/tidb#72228 · Filter by author AricSu opened on Oct 23, 2026
  2

• enhance the tidb advancer under 10 million regions

  affects-8.5type/enhancement
  pingcap/tidb#72224 · Filter by author Leavrth opened on Oct 23, 2026

• planner: disjoint constant predicates across INTERSECT branches and across CTE boundaries do not fold to TableDual

  contributionfirst-time-contributorseverity/moderatesig/plannertype/bug
  pingcap/tidb#72223 · Filter by author wjjc1017 opened on Oct 23, 2026
  3

• CREATE TABLE with high number of constraints leads to hanging DDL

  component/ddlsecurityseverity/moderatesig/sql-infratype/bug
  pingcap/tidb#72209 · Filter by author dveeden opened on Oct 22, 2026
  6

  

• go.mod: update PD client to the latest tikv/pd release-nextgen-202603 commit

  component/pdtype/enhancement
  pingcap/tidb#72206 · Filter by author JmPotato opened on Oct 22, 2026

• Constraint order doesn't match MySQL

  component/ddlseverity/minortype/bugtype/compatibility
  pingcap/tidb#72202 · Filter by author dveeden opened on Oct 22, 2026
  6

  

• br: add structured failure categories and retain TiKV diagnostics

  contributiontype/enhancement
  pingcap/tidb#72201 · Filter by author nanassito opened on Oct 22, 2026

• ddl: improve readability of partition DDL handlers

  component/ddlcomponent/tablepartitiontype/enhancement
  pingcap/tidb#72195 · Filter by author D3Hunter opened on Oct 22, 2026

• expression: constant propagation skips binary_col = 'string', leading to slow query execution

  contribution
  pingcap/tidb#72194 · Filter by author sanketkedia opened on Oct 22, 2026
  1

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

  component/testflaky-testtype/enhancement
  pingcap/tidb#72190 · Filter by author ti-chi-bot opened on Oct 22, 2026

• Tracking issue for geospatial support

  type/feature-request
  pingcap/tidb#72188 · Filter by author mjonss opened on Oct 21, 2026

• Vector distance functions return NULL or zero for finite nonzero vectors at extreme magnitudes

  contributionmay-affects-7.5may-affects-8.1may-affects-8.5may-affects-25.10may-affects-26.3may-affects-26.9severity/majorsig/executiontype/bug
  pingcap/tidb#72186 · Filter by author Zhs17 opened on Oct 21, 2026
  2

• TiDB v8.5.6: ordered scans miss own uncommitted inserts after ANALYZE; 0.1 sampling gives different results, 0.01 restores correct reads in tested cases

  contributionfirst-time-contributor
  pingcap/tidb#72185 · Filter by author CsongSY opened on Oct 21, 2026
  1

• statistics: auto-analyze queue initialization can OOM on memory-constrained nodes with many tables

  affects-8.5component/statisticsnextgenseverity/majorsig/plannertype/bug
  pingcap/tidb#72184 · Filter by author D3Hunter opened on Oct 21, 2026
  1

  

• planner: reduce per-execution CPU on the prepared plan cache hit path

  sig/plannertype/enhancementtype/performance
  pingcap/tidb#72178 · Filter by author cfzjywxk opened on Oct 21, 2026

• executor: a join of two PointGets reads the keys serially, could use one BatchGet

  component/executorsig/executiontype/enhancementtype/performance
  pingcap/tidb#72177 · Filter by author cfzjywxk opened on Oct 21, 2026

• planner: dirty-content check on partitioned tables seeks the txn memBuffer once per partition on every statement

  component/tablepartitionsig/plannertype/enhancementtype/performance
  pingcap/tidb#72176 · Filter by author cfzjywxk opened on Oct 21, 2026

• planner: allow per-query HNSW ef_search tuning for vector search

  contribution
  pingcap/tidb#72174 · Filter by author onlyxiaohuang opened on Oct 21, 2026

• planner, statistics: Analyze V1 uses inconsistent encodings for statistics collection and range estimation for clustered string primary keys with new collations

  component/statisticsreport/customerseverity/minorsig/plannertype/bug
  pingcap/tidb#72171 · Filter by author qw4990 opened on Oct 21, 2026
  2

• Flaky test: TestTiFlashProgressForPartitionTable in pkg/ddl/tests/tiflash

  component/testflaky-testtype/enhancement
  pingcap/tidb#72166 · Filter by author ti-chi-bot opened on Oct 21, 2026

• Flaky test: TestDumpServiceLifecycle/data_failure in dumpling/export

  component/testflaky-testtype/enhancement
  pingcap/tidb#72165 · Filter by author ti-chi-bot opened on Oct 21, 2026

• Flaky test: TestDumpServiceLifecycle in dumpling/export

  component/testflaky-testtype/enhancement
  pingcap/tidb#72164 · Filter by author ti-chi-bot opened on Oct 21, 2026