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ClickHouseยฎ is a real-time analytics database management system
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Click House v26.5.6.64-stable

Click House: v26.5.6.64-stable Release

Release date:
July 22, 2026
Previous version:
v26.5.5.8-stable (released June 30, 2026)
Magnitude:
22 Diff Delta
Contributors:
6 total committers
Data confidence:
Commits:
42 impacting commits

79 Features Released with v26.5.6.64-stable

Avoid storing `S3` credentials in backup metadata
#107357
Adding `aiEmbed` function
#102922
Fix race between ALTER RENAME COLUMN and merge causing data loss (#80648)
#104822
Fix crash on deeply nested expressions with raised max_parser_depth
#108493
Split remote database and data lake visibility settings
#109082
Fix skip+unused_shards through `Merge` over `Distributed` in the analyzer
#106250
Enforce access control for MySQL COM_FIELD_LIST and COM_INIT_DB
#108508
Do not validate DataLakeCatalog auth_header or build catalog on ATTACH
#108674
Do not infer `Nullable(Tuple)` in Arrow, ArrowStream, ORC, Parquet and Avro schema inference unless the type is enabled
#109185
Fix system.tables skipping databases for users with per-database grants
#109723
Fix TSan data race in uniqExact two-level parallel merge
#109389
Harden 00965_send_logs_level_concurrent_queries: match <Trace> marker instead of awk field 8
#110035
Fix logical error casting Dynamic/Variant inside Tuple with accurateCastOrNull
#108061
Restrict catboostEvaluate model path to user_files
#108463
Restore prefetch for small files read from object storage
#108872
read auth_response length as UInt8 in MySQL handshake
#107384
Require SYSTEM RESET DDL WORKER privilege for SYSTEM RESET DDL WORKER
#108460
Allow reading MergeTree parts with mixed codecs in one stream
#108592
Reschedule the background data-parts refresh task after an exception
#108034
Validate the bad data of DDSketch on insertion
#106236
Match http_forbid_headers case-insensitively
#108509
Fix heap-buffer-overflow when serializing a shared quantileTDigest state
#110263
Fix used_privileges leaking across unrelated queries in system.query_log
#106425
Setting to use blob endpoint instead of dfs
#106843
Fix runtime join filter producing wrong results for JSON columns
#107663
Do not cache query condition results for sampled reads
#108488
Fix projection incorrectly reading a newly-added column as the type default instead of its DEFAULT value
#108569
fix column order for distributed alias columns
#107675
Issue the initial small-object prefetch also over the filesystem cache
#109478
Reset adopted part level to 0 on cross-engine ATTACH/CLONE/MOVE PARTITION
#107481

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Top Contributors in v26.5.6.64-stable

robot-clickhouse
george-larionov
nihalzp
PedroTadim
alexey-milovidov
tiandiwonder

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