Issues

• 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

• json: panic or broken output when formatting doubles in containers, and non-ASCII path keys rejected

  severity/moderatesig/sql-infratype/bug
  pingcap/tidb#71829 · Filter by author joechenrh opened on Oct 8, 2026
  1

• 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/ddlcontributionmay-affects-7.5may-affects-8.1may-affects-8.5may-affects-25.10may-affects-26.3may-affects-26.9severity/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

• 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

• planner, executor: support loose index scan for GROUP BY / DISTINCT on an index prefix

  type/enhancement
  pingcap/tidb#71808 · Filter by author terry1purcell opened on Oct 8, 2026

• Floating-point functions give different results in TiDB, TiKV and TiFlash, and on arm64 and x86_64 nodes

  pingcap/tidb#71807 · Filter by author mjonss opened on Oct 7, 2026
  2

• planner: defer table row fetches past joins, filters and OFFSET (late materialization)

  sig/plannertype/enhancement
  pingcap/tidb#71798 · Filter by author terry1purcell opened on Oct 7, 2026

• server: graceful shutdown drops the next command of idle pooled connections instead of closing them

  contributiontype/enhancement
  pingcap/tidb#71795 · Filter by author vldmit opened on Oct 7, 2026

• planner: out-of-range estimation asserts on the NULL-only range built by Limit cross estimation

  severity/minorsig/plannertype/bug
  pingcap/tidb#71792 · Filter by author terry1purcell opened on Oct 6, 2026
  1

• Redundant root Selection rechecks JSON predicates already enforced by a multi-valued index

  sig/plannertype/enhancement
  pingcap/tidb#71790 · Filter by author terry1purcell opened on Oct 6, 2026

• Writing rows with large multi-valued index arrays is quadratic in the array length

  sig/sql-infratype/enhancementtype/performance
  pingcap/tidb#71788 · Filter by author terry1purcell opened on Oct 6, 2026

• Support keeping only listed keys of a JSON object (lazy cleanup of per-column metadata)

  component/expressiontype/feature-request
  pingcap/tidb#71785 · Filter by author terry1purcell opened on Oct 6, 2026

• TIDB_DECODE_KEY silently drops every VARCHAR column from a composite common handle

  contributionfirst-time-contributorseverity/moderatesig/diagnosistype/bug
  pingcap/tidb#71783 · Filter by author teotia opened on Oct 6, 2026
  3

• Support indexing all path/value pairs of a JSON document (GIN jsonb_path_ops equivalent)

  component/expressionsig/plannertype/feature-request
  pingcap/tidb#71780 · Filter by author terry1purcell opened on Oct 6, 2026

• Flaky test: TestClientDisconnectKillsExplicitTxn/begin/query in pkg/server/tests/commontest

  component/testflaky-testtype/enhancement
  pingcap/tidb#71778 · Filter by author ti-chi-bot opened on Oct 6, 2026

• Flaky test: TestClientDisconnectKillsExplicitTxn in pkg/server/tests/commontest

  component/testflaky-testtype/enhancement
  pingcap/tidb#71777 · Filter by author ti-chi-bot opened on Oct 6, 2026

• planner: constant propagation and OR-branch pruning skip string columns whenever the constant's collation label differs from the column's, even when the comparison is binary

  contributionseverity/moderatesig/plannertype/bug
  pingcap/tidb#71776 · Filter by author Tema opened on Oct 5, 2026
  3

• Expose configurable AWS web identity session duration for BR S3 storage

  contributionfirst-time-contributortype/feature-request
  pingcap/tidb#71772 · Filter by author ankitcharolia opened on Oct 5, 2026
  1

• A date string with '-' before the time ('2021-01-01 -12:00:00') parses in TiDB but is NULL in TiKV

  contribution
  pingcap/tidb#71766 · Filter by author r33s3n6 opened on Oct 4, 2026

• CONCAT on a VECTOR(1) column truncates the text to one character

  contribution
  pingcap/tidb#71765 · Filter by author r33s3n6 opened on Oct 4, 2026
  1

• CONCAT_WS counts a separator for the first argument from the third row on

  contribution
  pingcap/tidb#71764 · Filter by author r33s3n6 opened on Oct 4, 2026

• DATE_ADD with a compound INTERVAL whose total overflows int64 wraps around to an unrelated date

  contribution
  pingcap/tidb#71763 · Filter by author r33s3n6 opened on Oct 4, 2026