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ClickHouseยฎ is a real-time analytics database management system
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Click House v26.2.5.45-stable

Click House: v26.2.5.45-stable Release

Release date:
March 19, 2026
Previous version:
v26.2.4.23-stable (released March 5, 2026)
Magnitude:
193 Diff Delta
Contributors:
2 total committers
Data confidence:
Commits:
46 impacting commits

88 Features Released with v26.2.5.45-stable

Fix adjusting RLIMIT_SIGPENDING (via pending_signals)
#98829
Fix tuple subcolumn access by name for external tables
#98755
Fix query tree pass order for `GROUP BY` rewrites
#98980
Fix crash in CachedOnDiskReadBufferFromFile destructor
#99042
Do not check grants for every query tree node during `InverseDictionaryLookupPass`
#99210
Fix crash on memory limit happened while applying patches
#99086
Fix CHECK TABLE with sparse serialization inside Tuple with Dynamic
#99351
Fix heap-use-after-free in IntersectOrExceptTransform with duplicate column names
#99471
Backport #98598 to 26.2: do not retry DB::Exception in PocoHTTPClient
#98840
Backport #98776 to 26.2: Fix detecting set skip index usefulness with OR with false (i.e. or(x, 0)) predicate
#98838
Fix unexpected result with read_in_order_use_virtual_row
#98514
Fix reverseUTF8 exception on invalid UTF-8 input
#98770
Backport #98797 to 26.2: Fix `SYSTEM START REPLICATED VIEW` not waking up the refresh task
#98855
Backport #98829 to 26.2: Fix adjusting RLIMIT_SIGPENDING (via pending_signals)
#98880
Backport #98869 to 26.2: stabilize test test_http_limits
#98890
Fix segfault in recursive CTE with `remote()` + `view()`
#99081
Backport #98514 to 26.2: Fix unexpected result with read_in_order_use_virtual_row
#98930
Backport #98931 to 26.2: Support SAMPLE clause in distributed index analysis
#99057
Fix rebuild of text indexes on merges with TTL
#99107
Backport #98013 to 26.2: Fix `DUPLICATE_COLUMN` and silent NULLs for Delta Lake structs with dotted field names
#99072
Backport #98755 to 26.2: Fix tuple subcolumn access by name for external tables
#99094
Backport #98482 to 26.2: Allow `CAST(... AS Nullable(T))` monotonicity to enable read-in-order optimization and primary key pruning
#99052
Backport #99112 to 26.2: Return unknown filter result on non-built ColumnSet
#99218
Backport #99107 to 26.2: Fix rebuild of text indexes on merges with TTL
#99151
Backport #98569 to 26.2: Disallow dropping column when its subcolumns are used in other columns default/alias expressions and use analyzer for default expressions on alter drop column
#99160
Backport #99042 to 26.2: Fix crash in CachedOnDiskReadBufferFromFile destructor
#99235
Backport #99084 to 26.2: Try not to re-caclculate indexes in requestReadingInOrder
#99189
Backport #99205 to 26.2: Fix max_execution_time not being applied for backup/restore
#99294
Backport #99210 to 26.2: Do not check grants for every query tree node during `InverseDictionaryLookupPass`
#99255
Backport #99086 to 26.2: Fix crash on memory limit happened while applying patches
#99303

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