pingcap/tiflash

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The analytical engine for TiDB and TiDB Cloud. Try free: https://tidbcloud.com/free-trial

Stars: 1k
Forks: 423
Open beginner issues: 0
Indexed issues: 592
Avg merge: 1d 15h
Merged PRs (30d): 24

Dominant language: C++
License: Apache-2.0
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 19, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue help wanted

Beginner friendly Everything

Open All

592 open issues indexed

MPP query fails when a consumer finishes early: in-flight writes hit an already-closed tunnel and abort the query Open

severity/major type/bug

Difficulty 5/5 Over a week Newbie friendliness 38/100

pingcap/tiflash#11092 · 1 comment · Opened Sep 16, 2026
Replace the JSON_VALID workaround with general short-circuit evaluation Open

type/enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

pingcap/tiflash#11086 · Opened Sep 10, 2026
flaky test: StorageDeltaMergeTest.RestoreAfterClearData Open

component/storage type/bug

Difficulty 3/5 1-2 days Newbie friendliness 65/100

pingcap/tiflash#11079 · Opened Sep 7, 2026
ColumnarScanContext serialize/deserialize new fields to tipb and tidb Open

type/enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

pingcap/tiflash#11071 · Opened Sep 1, 2026
test: EventTestRunner.throwException times out during cancellation Open

component/compute type/bug

Difficulty 2/5 1-2 days Newbie friendliness 82/100

pingcap/tiflash#11069 · Opened Sep 1, 2026
Timestamp with session timezone column support late materialization Open

type/enhancement

pingcap/tiflash#11067 · 1 assignee · Opened Aug 31, 2026
MPP task can remain alive after cancel and abort return Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

pingcap/tiflash#11059 · 2 comments · Opened Aug 26, 2026
TiFlash: read only StringSizes for LENGTH / CHAR_LENGTH scans Open

type/feature-request type/performance

Difficulty 5/5 Over a week Newbie friendliness 35/100

pingcap/tiflash#11051 · Opened Aug 18, 2026
TiFlash: pack-level max_len skip for MAX(CHAR_LENGTH) / MAX(LENGTH) Open

type/feature-request type/performance

Difficulty 5/5 Over a week Newbie friendliness 35/100

pingcap/tiflash#11050 · Opened Aug 18, 2026
TiFlash: optimize full-table MAX(CHAR_LENGTH) scans on string columns Open

type/enhancement type/performance

Difficulty 5/5 Over a week Newbie friendliness 35/100

pingcap/tiflash#11049 · 2 comments · Opened Aug 18, 2026
TooManyInvalidVersion GC rewrites entire stable when reclaimable data is tiny Open

component/storage type/enhancement

Difficulty 5/5 Over a week Newbie friendliness 42/100

pingcap/tiflash#11048 · 1 comment · Opened Aug 17, 2026
Support rough set filter for Decimal columns Open

affects-8.5

Difficulty 5/5 Over a week Newbie friendliness 45/100

pingcap/tiflash#11031 · Opened Aug 10, 2026
Disagg EstablishDisaggTask keeps MEET_LOCK for ~2s after large txn already committed Open

type/bug

Difficulty 5/5 Over a week Newbie friendliness 35/100

pingcap/tiflash#11013 · 1 comment · Opened Aug 3, 2026
flaky test: `RegionBlockReaderTest.OverflowColumnRowV2` Open

severity/moderate type/bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

pingcap/tiflash#11010 · 1 comment · Opened Jul 31, 2026
TiFlash stays disconnected for minutes after PD leader transfer due to proxy pd_client NO_RETRY Open

component/storage type/bug

Difficulty 3/5 1-2 days Newbie friendliness 72/100

pingcap/tiflash#11004 · Opened Jul 28, 2026
Support multi-stage late materialization for DeltaMerge TableScan Open

affects-8.5 type/bug

Difficulty 5/5 Over a week Newbie friendliness 25/100

pingcap/tiflash#11003 · Opened 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 Open

may-affects-7.5 may-affects-8.1 may-affects-8.5 severity/major type/bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

pingcap/tiflash#11002 · 1 comment · Opened Jul 27, 2026
[tidbx] query report error when injection tiflash wn network partition Open

type/bug

pingcap/tiflash#10994 · 2 comments · 1 assignee · Opened Jul 21, 2026
UNIX_TIMESTAMP returns 0 in TiFlash for DATETIME values after 2038 while TiDB returns the extended timestamp Open

component/compute type/bug

Difficulty 4/5 3-5 days Newbie friendliness 58/100

pingcap/tiflash#10991 · Opened Jul 20, 2026
[tidbx]tiflash cn oom when run tpch with tiflash columnar Open

severity/major type/bug

pingcap/tiflash#10990 · 1 comment · 1 assignee · Opened Jul 17, 2026
Improve rough set filtering for temporal columns with sparse extreme values Open

affects-8.5 type/enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

pingcap/tiflash#10989 · Opened Jul 17, 2026
Validate TiFlash advertised endpoints before registering a new store with PD Open

component/storage type/bug

Difficulty 5/5 Over a week Newbie friendliness 35/100

pingcap/tiflash#10977 · Opened Jul 13, 2026
flaky test: RegionKVStoreTestFAP.Cancel2 Open

component/storage severity/moderate type/bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

pingcap/tiflash#10936 · Opened Jun 27, 2026
TiFlash panic if an Region across multiple table_id or index keyrange Open

component/storage type/bug

Difficulty 4/5 3-5 days Newbie friendliness 52/100

pingcap/tiflash#10908 · 1 comment · Opened Jun 23, 2026
storage: prune dt_local_indexes by table_id/index_id before getLocalIndexStats Open

component/storage contribution type/enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

pingcap/tiflash#10880 · 2 comments · Opened Jun 1, 2026
tiflash-proxy CI: flaky proxy_tests in fast_add_peer and snapshot merge Open

type/bug

Difficulty 5/5 Over a week Newbie friendliness 35/100

pingcap/tiflash#10879 · Opened May 30, 2026
Next-gen columnar: handle empty remote region scan Open

columnar type/enhancement

Difficulty 4/5 3-5 days Newbie friendliness 68/100

pingcap/tiflash#10848 · Opened May 19, 2026
Next-gen columnar: harden RegionError/LockedError handling in StorageDisaggregatedColumnar Open

columnar type/enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

pingcap/tiflash#10847 · Opened May 19, 2026
Potential unaligned memory access causes bus error on ARM Open

affects-6.1 affects-6.5 affects-7.1 affects-7.5 affects-8.1 affects-8.5 affects-9.0 component/compute severity/major type/bug

Difficulty 3/5 1-2 days Newbie friendliness 62/100

pingcap/tiflash#10782 · Opened Mar 31, 2026
Support `latin1_swedish_ci` collation Open

type/enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

pingcap/tiflash#10779 · Opened Mar 29, 2026
Support materialized view out-of-place complete refresh cutover in TiFlash schema sync Open

affects-8.5 component/compute type/enhancement

Difficulty 3/5 1-2 days Newbie friendliness 68/100

pingcap/tiflash#10773 · Opened Mar 26, 2026
Add TTL mechanism for region cache Open

affects-8.5 component/compute type/enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

pingcap/tiflash#10748 · Opened Mar 17, 2026
TiFlash crashes when memory limit is exceeded Open

contribution first-time-contributor type/enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

pingcap/tiflash#10739 · 1 comment · Opened Mar 11, 2026
Support commit ts in TiFlash Open

type/feature-request

Difficulty 5/5 Over a week Newbie friendliness 20/100

pingcap/tiflash#10715 · Opened Feb 11, 2026
[next gen] Support deploy on Azure Open

component/storage nextgen type/feature-request

Difficulty 5/5 Over a week Newbie friendliness 25/100

pingcap/tiflash#10712 · Opened Feb 9, 2026
Failed ASan Test: UniversalPageStorageServiceCheckpointTest.DumpFail Open

component/storage severity/moderate type/bug

Difficulty 4/5 3-5 days Newbie friendliness 15/100

pingcap/tiflash#10707 · 1 comment · Opened Feb 6, 2026
TiFlash is reporting errors and restarting continuously. [ERROR]: Detected overflow when decoding integer of length 22 with column type UInt64: pk_type is INT64, schema_snapshot->col_id_to_block_pos Open

component/storage contribution first-time-contributor type/bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

pingcap/tiflash#10681 · 1 comment · Opened Jan 27, 2026
DMStoreForSegmentReadTaskTest.FetchPagesNoTinyNoInMem has data race Open

component/storage severity/moderate type/bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

pingcap/tiflash#10673 · 4 comments · Opened Jan 23, 2026
[tidb-x] After killing a tikv for some time, a tiflash wn repeatedly crashes Open

component/storage may-affects-6.5 may-affects-7.1 may-affects-7.5 may-affects-8.1 may-affects-8.5 severity/major type/bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

pingcap/tiflash#10670 · 2 comments · Opened Jan 20, 2026
Downgrade some unnecessary loggings Open

affects-8.5 component/storage severity/moderate type/enhancement

Difficulty 3/5 1-2 days Newbie friendliness 45/100

pingcap/tiflash#10638 · Opened Jan 4, 2026
Enhance observability on disagg arch Open

nextgen type/enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

pingcap/tiflash#10634 · Opened Dec 28, 2025
Fail TSAN test: DeltaMergeStoreTestFastAddPeer.SimpleWriteReadAfterRestoreFromCheckPointWithSplit Open

component/storage severity/moderate type/bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

pingcap/tiflash#10630 · 1 comment · Opened Dec 24, 2025
[tidb-x] tiflash wn crash repeatedly after recovery network partition from dfs Open

component/storage nextgen severity/major type/bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

pingcap/tiflash#10624 · 2 comments · Opened Dec 22, 2025
Smarter Cache Management for tiflash-compute Open

component/storage nextgen type/enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

pingcap/tiflash#10620 · Opened Dec 19, 2025
ERROR 9014 (HY000): TiFlash backfill index failed: Code: 0 Open

contribution type/bug

Difficulty 4/5 3-5 days Newbie friendliness 42/100

pingcap/tiflash#10617 · 3 comments · Opened Dec 17, 2025
flaky test `DMStoreForSegmentReadTaskTest.DisaggReadSnapshot` Open

component/storage type/bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

pingcap/tiflash#10612 · Opened Dec 12, 2025
flaky test `S3DMFile.WithFileCache` Open

component/storage severity/moderate type/bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

pingcap/tiflash#10611 · Opened Dec 12, 2025
`endless-htap-consistency-chaos` failed Open

component/storage severity/major type/bug

pingcap/tiflash#10586 · 2 comments · 1 assignee · Opened Dec 3, 2025
Fail TSAN test: PageStorageV2With2PagesTest.GetIdenticalSnapshots Open

component/storage type/bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

pingcap/tiflash#10560 · Opened Nov 21, 2025
UniversalPageStorageServiceCheckpointTest.DumpAndRead fails in tsan Open

component/storage severity/moderate type/bug

Difficulty 4/5 3-5 days Newbie friendliness 30/100

pingcap/tiflash#10548 · 1 comment · Opened Nov 13, 2025

pingcap/tiflash

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