Issues

• columnar: support Azure Blob storage and Key Vault master keys

  contribution
  pingcap/tiflash#11119 · Filter by author iosmanthus opened on Oct 13, 2026

• scheduler: context switch cause performance regression even pipeline_keyspace_cpu_limit_ratio set to 1.0

  type/enhancement
  pingcap/tiflash#11117 · Filter by author yongman opened on Oct 13, 2026

• columnar: avoid ColumnString reallocation in RNColumnarInputStream by reusing avg value size hints

  type/enhancement
  pingcap/tiflash#11114 · Filter by author ChangRui-Ryan opened on Oct 12, 2026

• Support online migration from tiflash disagg-write to columnar

  type/enhancement
  pingcap/tiflash#11105 · Filter by author JaySon-Huang opened on Sep 22, 2026
  

• Replace the JSON_VALID workaround with general short-circuit evaluation

  type/enhancement
  pingcap/tiflash#11086 · Filter by author ChangRui-Ryan opened on Sep 10, 2026

• flaky test: StorageDeltaMergeTest.RestoreAfterClearData

  component/storagetype/bug
  pingcap/tiflash#11079 · Filter by author JaySon-Huang opened on Sep 7, 2026

• ColumnarScanContext serialize/deserialize new fields to tipb and tidb

  type/enhancement
  pingcap/tiflash#11071 · Filter by author yongman opened on Sep 1, 2026

• test: EventTestRunner.throwException times out during cancellation

  component/computetype/bug
  pingcap/tiflash#11069 · Filter by author wuhuizuo opened on Sep 1, 2026

• Timestamp with session timezone column support late materialization

  type/enhancement
  pingcap/tiflash#11067 · Filter by author yongman opened on Aug 31, 2026
  

• MPP task can remain alive after cancel and abort return

  pingcap/tiflash#11059 · Filter by author King-Dylan opened on Aug 26, 2026
  2

  

• TiFlash: read only StringSizes for LENGTH / CHAR_LENGTH scans

  type/feature-requesttype/performance
  pingcap/tiflash#11051 · Filter by author JaySon-Huang opened on Aug 18, 2026

• TiFlash: pack-level max_len skip for MAX(CHAR_LENGTH) / MAX(LENGTH)

  type/feature-requesttype/performance
  pingcap/tiflash#11050 · Filter by author JaySon-Huang opened on Aug 18, 2026

• TiFlash: optimize full-table MAX(CHAR_LENGTH) scans on string columns

  type/enhancementtype/performance
  pingcap/tiflash#11049 · Filter by author JaySon-Huang opened on Aug 18, 2026
  2

• TooManyInvalidVersion GC rewrites entire stable when reclaimable data is tiny

  component/storagetype/enhancement
  pingcap/tiflash#11048 · Filter by author JaySon-Huang opened on Aug 17, 2026
  1

• Support rough set filter for Decimal columns

  affects-8.5
  pingcap/tiflash#11031 · Filter by author windtalker opened on Aug 10, 2026

• Disagg EstablishDisaggTask keeps MEET_LOCK for ~2s after large txn already committed

  type/bug
  pingcap/tiflash#11013 · Filter by author JaySon-Huang opened on Aug 3, 2026
  1

• flaky test: RegionBlockReaderTest.OverflowColumnRowV2

  severity/moderatetype/bug
  pingcap/tiflash#11010 · Filter by author JaySon-Huang opened on Jul 31, 2026
  1

• TiFlash stays disconnected for minutes after PD leader transfer due to proxy pd_client NO_RETRY

  component/storagetype/bug
  pingcap/tiflash#11004 · Filter by author JaySon-Huang opened on Jul 28, 2026

• Support multi-stage late materialization for DeltaMerge TableScan

  affects-8.5type/bug
  pingcap/tiflash#11003 · Filter by author windtalker opened on Jul 27, 2026

• [tidbx] tiflash wn crash repeatedly with “[FATAL] [Exception.cpp:98] [\"Code: 11000, e.displayText() = DB::Exception: Open S3 file for read fail after retries when init file...” after kill the wn

  may-affects-7.5may-affects-8.1may-affects-8.5severity/majortype/bug
  pingcap/tiflash#11002 · Filter by author Lily2025 opened on Jul 27, 2026
  1

• [tidbx] query report error when injection tiflash wn network partition

  type/bug
  pingcap/tiflash#10994 · Filter by author Lily2025 opened on Jul 21, 2026
  2

  

• UNIX_TIMESTAMP returns 0 in TiFlash for DATETIME values after 2038 while TiDB returns the extended timestamp

  component/computetype/bug
  pingcap/tiflash#10991 · Filter by author JaySon-Huang opened on Jul 20, 2026

• [tidbx]tiflash cn oom when run tpch with tiflash columnar

  severity/majortype/bug
  pingcap/tiflash#10990 · Filter by author Lily2025 opened on Jul 17, 2026
  1

  

• Improve rough set filtering for temporal columns with sparse extreme values

  affects-8.5type/enhancement
  pingcap/tiflash#10989 · Filter by author JaySon-Huang opened on Jul 17, 2026

• Validate TiFlash advertised endpoints before registering a new store with PD

  component/storagetype/bug
  pingcap/tiflash#10977 · Filter by author kennedy8312 opened on Jul 13, 2026