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ClickHouse® is a real-time analytics database management system

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Click House v26.6.4.55-stable

Click House: v26.6.4.55-stable Release

Release date:

August 31, 2026

Previous version:

v26.6.3.62-stable (released August 18, 2026)

Magnitude:

37 Diff Delta

Contributors:

6 total committers

Data confidence:

Commits:

21 Commits in this Release

Ordered by the degree to which they evolved the repo in this version.

Backport #116134 to 26.6: Do not rescan the whole part's marks on every LowCardinality read

Authored August 25, 2026

Backport #114155 to 26.6: Text index: fix out-of-bounds write in front-coding deserialization

Authored August 19, 2026

Backport #115222 to 26.6: Bound text index posting list deserialization

Authored August 26, 2026

Backport #116538 to 26.6: Restore short-circuit of a filter on an empty IN set over a Nullable column

Authored August 29, 2026

Backport #114826 to 26.6: Hold the table lock across a lightweight UPDATE pipeline

Authored August 28, 2026

Backport #114182 to 26.6: Fix top-K dynamic filtering for empty Tuple columns

Authored August 28, 2026

Backport #110480 to 26.6: Fix flaky 03151_unload_index_race: guard count compare against empty read

Authored August 29, 2026

Backport #116371 to 26.6: Fix a `_table`/`_database` filter over a `Merge` table returning no rows for children that read from other tables

Authored August 29, 2026

Fix backport for unavailable `CreateContainer` opcode

Authored August 28, 2026

Backport #115443 to 26.6: Validate Variant discriminator in ColumnVariant arena deserialization

Authored August 25, 2026

Fix build: read sparse index token through the tokens column

Authored August 24, 2026

Backport #115866 to 26.6: Add Objects' paths to deduplication hashing

Authored August 24, 2026

Merge pull request #111701 from groeneai/fix-flaky-kafka-formats-with-broken-message

Authored July 24, 2026

Fix aborting unit test in the backport of the bounded posting list deserialization

Authored August 29, 2026

Backport #115669 to 26.6: Fix out-of-bounds read in `formatRowNoNewline` with empty rows

Authored August 21, 2026

Backport #115791 to 26.6: Hide aws_external_id in DataLakeCatalog SHOW CREATE DATABASE

Authored August 28, 2026

Backport #111329 to 26.6: Use bloom_filter skip index for IN with transform_null_in=1 and NULL-free set

Authored August 25, 2026

Backport #115466 to 26.6: Do not strip injective functions that hide argument nullability inside uniq

Authored August 20, 2026

Backport #108728 to 26.6: Fix CREATE OR REPLACE MATERIALIZED VIEW .

Authored August 19, 2026

Pin fuzzer and DROP behavior in the KeeperMap metadata test on 26.6

Authored August 27, 2026

Backport #116851 to 26.6: `formatDateTime`: Cache resolved time zones locally

Authored August 31, 2026

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Top Contributors in v26.6.4.55-stable

robot-clickhouse

antonio2368

groeneai

antaljanosbenjamin

CurtizJ

alexey-milovidov

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