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Sanitizer (STID: 2064-22d0)

fuzzProblem found by one of the fuzzersProblem found by one of the fuzzers

sanitizer

testingSpecial issue with list of bugs found by CISpecial issue with list of bugs found by CI

Status: Open.

#114396 In ClickHouse/ClickHouse;

· thevar1able opened on Aug 11, 2026

Logical error: Sizes of nested column and null map of Nullable column are not equal after deserialization (null map size = A, nested column size = B) (STID: 6726-6444)

fuzzProblem found by one of the fuzzersProblem found by one of the fuzzers

testingSpecial issue with list of bugs found by CISpecial issue with list of bugs found by CI

Status: Open.

#114368 In ClickHouse/ClickHouse;

· Avogar opened on Aug 11, 2026

AST fuzzer: fuzzed QueryRunner tables with threads = 1024 exhaust the global thread pool (CANNOT_SCHEDULE_TASK storm, job killed as Received signal 15)

fuzzProblem found by one of the fuzzersProblem found by one of the fuzzers

testingSpecial issue with list of bugs found by CISpecial issue with list of bugs found by CI

Status: Open.

#114367 In ClickHouse/ClickHouse;

· alexey-milovidov opened on Aug 11, 2026

Does CODEC(Default) mean server's default of table's one?

questionQuestion?Question?

Status: Open.

#114361 In ClickHouse/ClickHouse;

· 4ertus2 opened on Aug 11, 2026

query_plan_join_swap_table changes the result of ANY INNER JOIN with OR-ed ON conditions (deterministic, max_threads = 1)

bugConfirmed user-visible misbehaviour in official releaseConfirmed user-visible misbehaviour in official release

comp-joinsJOINs end-to-end (planning hooks + runtime join operators/algorithms). Single bucket to avoid pla...JOINs end-to-end (planning hooks + runtime join operators/algorithms). Single bucket to avoid pla...

Status: Open.

#114354 In ClickHouse/ClickHouse;

· zlareb1 opened on Aug 11, 2026

GROUP BY returns the same key in multiple rows when the left side of a JOIN is SELECT DISTINCT (parallel_hash + optimize_distinct_in_order

potential bugTo be reviewed by developers and confirmed/rejected.To be reviewed by developers and confirmed/rejected.

Status: Open.

#114352 In ClickHouse/ClickHouse;

· zudiay opened on Aug 11, 2026

Iceberg: a schema field with an empty name aborts the server on read

bugConfirmed user-visible misbehaviour in official releaseConfirmed user-visible misbehaviour in official release

comp-datalakeData lake table formats (Iceberg/Delta/Hudi) integration.Data lake table formats (Iceberg/Delta/Hudi) integration.

Status: Open.

#114350 In ClickHouse/ClickHouse;

· PedroTadim opened on Aug 11, 2026

S3 multipart complete: a NoSuchUpload is rewritten to success on key existence alone, silently losing an acknowledged fixed-key INSERT

bugConfirmed user-visible misbehaviour in official releaseConfirmed user-visible misbehaviour in official release

comp-object-storageObject storage connectivity (S3/GCS/Azure) including credentials, retries, multipart, etc.Object storage connectivity (S3/GCS/Azure) including credentials, retries, multipart, etc.

Status: Open.

#114348 In ClickHouse/ClickHouse;

· zlareb1 opened on Aug 11, 2026

Buffer table silently discards an acknowledged INSERT when the destination schema drifts (DROP / re-CREATE) before the deferred flush

bugConfirmed user-visible misbehaviour in official releaseConfirmed user-visible misbehaviour in official release

Status: Open.

#114330 In ClickHouse/ClickHouse;

· zlareb1 opened on Aug 11, 2026

Mutation on a Compact part fails with NOT_FOUND_COLUMN_IN_BLOCK when a materialized skip index covers a newly added column

Status: Open.

#114329 In ClickHouse/ClickHouse;

· thiagohora opened on Aug 11, 2026

SYSTEM RELOAD/UNLOAD DICTIONARY ON CLUSTER ignores the initiator's current database and silently targets default

Status: Open.

#114322 In ClickHouse/ClickHouse;

· groeneai opened on Aug 11, 2026

Debug-build AST round-trip check rejects ALTER USER ... RENAME TO {param:Identifier}

Status: Open.

#114319 In ClickHouse/ClickHouse;

· alexey-milovidov opened on Aug 11, 2026