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ClickHouse® is a real-time analytics database management system
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Click House v25.9.2.1-stable

Click House: v25.9.2.1-stable Release

Release date:
September 27, 2025
Previous version:
v25.9.1.1-new (released August 25, 2025)
Magnitude:
11,149 Diff Delta
Contributors:
30 total committers
Data confidence:
Commits:
410 impacting commits

368 Features Released with v25.9.2.1-stable

Few fuzzer fixes
#86749
Fix misleading `specified upload does not exist` error reporting because the original exception is lost in multipart upload
#86725
Fix GROUP BY Nullable(JSON)
#86410
Fix Backup db engine raising exception on query with zero sized part files
#86563
Docs: add warning about using bcrypt with high-frequency authentication
#87098
Setting to delete files in iceberg drop
#86501
Fix applying patches to columns with default expression
#87347
Fix using wrong default values for path with Enum hint inside JSON
#86065
Fix `The range specified is invalid for the current size of the resource` when reading from azure disk with plain_rewritable and encryption
#86400
Better fix for ShellCommandSource
#86606
CI: Fix sqlancer job
#86427
Fix MV dependencies double removal
#86413
fix processing includes in getOrCreateCustomDisk
#86232
Bump `openldap` to 2.6.10
#86623
Process exception thrown from background pool
#86932
CI: Fix stress azure job
#86697
Update version after release
#87344
Update README.md for Beijing, Singapore and Melbourne meetups
#86412
Query condition cache: introduce selectivity threshold
#86076
Nullablity bugs in insert and pruning
#86630
Check feature flag when adding RemoveRecursive request to Multi
#86554
Support other formats (ORC, ...) in iceberg writes
#87277
Update README.md for Delhi, Pune, Bangkok meetups coming up
#86146
Docs: support source code documentation for aggregate functions
#87256
Fix "Too large size passed to allocator" UB in JOIN due to mixed const and non-const blocks
#87231
Make pathStartsWith only match paths under the prefix
#87181
Fix leaking of MergesMutationsMemoryTracking and fix query_views_log for streaming
#86422
Forbid altering columns whose subcolumns are used in PK or partition expression
#86005
Ignore exceptions during flushing log on shutdown and make shutdown more safe
#86546
Take format from metadata when reading Iceberg tables
#86529

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Top Contributors in v25.9.2.1-stable

Blargian
maxknv
robot-clickhouse
PedroTadim
divanik
scanhex12
zoesteinkamp
rajatmohan22
shankar-iyer
Avogar

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