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Add SPANN memory-disk hybrid vector similarity index

Status: Open.

#102146 In ClickHouse/ClickHouse;

· zex-hyd opened on Apr 8, 2026

Insert into JSON with hints is much slower.

unexpected behaviourResult is unexpected, but not entirely wrong at the same time.Result is unexpected, but not entirely wrong at the same time.

Status: Open.

#102117 In ClickHouse/ClickHouse;

· den-crane opened on Apr 8, 2026

Logical error: Unknown virtual column: 'A (STID: 3381-2a5e)

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.

#102104 In ClickHouse/ClickHouse;

· PedroTadim opened on Apr 8, 2026

Broken part with force deduplicate_insert_select and LWU

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

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

Status: Open.

#102103 In ClickHouse/ClickHouse;

· PedroTadim opened on Apr 8, 2026

Flaky test: 03753_merge_selector_amm

flaky testflaky test found by CIflaky test found by CI

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

Status: Open.

#102081 In ClickHouse/ClickHouse;

· rschu1ze opened on Apr 8, 2026

Some of the JSONExtract* functions are behaving incorrectly with the new JSON type

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

Status: Open.

#102079 In ClickHouse/ClickHouse;

· antaljanosbenjamin opened on Apr 8, 2026

PREWHERE column not included in read plan when used inside parameterized view with JOIN

unexpected behaviourResult is unexpected, but not entirely wrong at the same time.Result is unexpected, but not entirely wrong at the same time.

Status: Open.

#102074 In ClickHouse/ClickHouse;

· Raquel10-RevenueCat opened on Apr 8, 2026

Native parquet reader: Too many bytes in mask

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

Status: Open.

#102057 In ClickHouse/ClickHouse;

· spinojara opened on Apr 8, 2026

object_shared_data_min_bytes_for_advanced_serialization

feature

Status: Open.

#102052 In ClickHouse/ClickHouse;

· UnamedRus opened on Apr 8, 2026

MemorySanitizer: use-of-uninitialized-value (STID: 2432-5ef5)

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.

#102051 In ClickHouse/ClickHouse;

· rschu1ze opened on Apr 8, 2026

lockTemporaryLocksLocked iterates unshuffled original instead of shuffled copy, making shuffle dead code

Status: Open.

#102049 In ClickHouse/ClickHouse;

· clickgapai opened on Apr 8, 2026

refreshDataParts catch block missing scheduleAfter causes permanent task death on transient error

Status: Open.

#102045 In ClickHouse/ClickHouse;

· clickgapai opened on Apr 8, 2026