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ClickHouseยฎ is a real-time analytics database management system
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Click House v25.9.7.56-stable

Click House: v25.9.7.56-stable Release

Release date:
December 18, 2025
Previous version:
v25.9.6.117-stable (released November 25, 2025)
Magnitude:
110 Diff Delta
Contributors:
3 total committers
Data confidence:
Commits:
58 impacting commits

110 Features Released with v25.9.7.56-stable

Add setting for compatibility serialziation of string
#90880
Fix memory usage in join with additional filter
#91664
Fix `isGrantedWildcard` for partial revoke.
#90922
Libssh forward to master
#90985
Make a separate IColumn method to take exact dynamic structure from a column
#87582
Fix possible inconsistent state of shared data and dynamic paths in JSON
#90816
Retry to markReplicasActive when failing to resolve address during local host check.
#90556
Fix UDF replace in format
#92210
Fix CI (due to tmpfs permissions changes in runc 1.3.3)
#91094
Reset async_insert value in the queue
#91386
Fix "Too large size passed to allocator" UB in JOIN due to mixed const and non-const blocks
#87231
Fix a bug about `toDateTimeOrNull` with negative argument
#90490
Fix named collections hidden secrets
#90765
CI: Fix clickhouse version tweak calculation for the fork with sync
#89098
Fix parsing JSON/Dynamic/Variant values from HTTP parameters
#90430
Fix high memory usage during reading JSON/Dynamic/Variant columns
#90907
Fix background flush of Buffer in case of frequent INSERTs
#90892
explicit POCO request for REST-polaris catalog
#91437
Fix merging JSON columns in Summing/Aggregating/Coalescing MergeTree
#91151
Fix possible inconsistent dynamic structure during writing in compact parts
#91152
Fix toLowCardinality type cast error with nullable columns
#90666
Forbid clear column for iceberg
#87895
Fix bug in reading subcolumns from JSON in compact parts
#90302
Fix handling of non materialized Nested(Tuple(...)) (added via ALTER)
#88879
fix(engines): validate GenerateRandom engine args are literal; return BAD_ARGUMENTS instead of LOGICAL_ERROR
#88157
Respect prefixes deserialization thread pool setting
#91208
Fix excessive Buffer flushes (burns CPU and produce tons of logs)
#91000
Fix infinite loop in AzureObjectStorage::listObjects
#90947
Fix lazy materialization of a column added via alter add column in old parts
#91142
Fix inserting into CoalescingMergeTree column with Tuple of JSON/Dynamic and LowCardinality
#91270

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Top Contributors in v25.9.7.56-stable

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