Altinity Project Antalya Builds for ClickHouse® 26.1

Here are the detailed release notes for Altinity Project Antalya build version 26.1. For more details on the project, see:

Release history

Version 26.1.6.20001 is the latest release. We recommend that you use this version.

Version	Release date	Details	Docker images
26.1.6.20001	2026-04-02	CI report Release page	AMD64 and Aarch64

Released 2026-04-02

Add TRUNCATE TABLE support for the Iceberg database engine with REST catalog backends (#1529 by @il9ue)
Google biglake catalog integration (ClickHouse#97104, ClickHouse#97561 by @scanhex12 via #1528)
Introduce async prefetch and staleness for Iceberg metadata ClickHouse#96191 by @arsenmuk via #1575)
Parquet metadata cache and arrow library version bump (ClickHouse#98140, ClickHouse#99230 by @grantholly-clickhouse, ClickHouse#96545 by @vitlibar, ClickHouse#99231 by @azat via #1574)
Different improvement for remote initiator (#1577 by @ianton-ru)

Improve the performance of data lakes. In previous versions, reading from object storage didn’t resize the pipeline to the number of processing threads. (ClickHouse#99548 by @alexey-milovidov via #1580)

Add support for EC JWT validation (ES* algorithms) (#1596 by @zvonand)
Add role-based access to Glue catalog. Use settings aws_role_arn and, optionally, aws_role_session_name. (ClickHouse#90825 by @antonio2368 via #1427)
Improve system.replicated_partition_exports performance and add metrics zk partition export (#1402 by @arthurpassos)
Add setting to define filename pattern for part exports - helps with sharding (#1490 by @arthurpassos)
Enabled experimental datalake catalogues by-default (#1504 by @Enmk)
Fix local replicated_partition_exports table might miss entries (#1500 by @arthurpassos)
Bump scheduled exports count only in case it has been scheduled (#1499 by @arthurpassos)
Improved processing ‘show tables’ query by fetching only names of tables and improved getLightweightTablesIterator to return structure containing only table names (ClickHouse#97062 by @SmitaRKulkarni via #1552)
Enable prewhere for iceberg (and fixes) (ClickHouse#95476 by @scanhex12, ClickHouse#98360, ClickHouse#100361 by @alexey-milovidov via #1581)
Avoid scanning the whole remote data lake catalog for “Maybe you meant …” table hints when show_data_lake_catalogs_in_system_tables is disabled (ClickHouse#100452 by @alsugiliazova via #1583)

Fixes an issue when Iceberg columns with dot in names returned NULL as values (ClickHouse#94335 by @mkmkme via #1448)
Use serialized metadata size to calculate the cache entry cell (#1484 by @arthurpassos)
Fix race condition on IPartitionStrategy (#1517 by @arthurpassos)
Fix timezone parameter in sorting key for Iceberg table when type of key is DateTime and setting iceberg_partition_timezone is used (#1526 by @ianton-ru)
Fix remote initiator host name (#1551 by @ianton-ru)
Fix export task not being killed during s3 outage (#1564 by @arthurpassos)
Use key (parsed without URI decoding) so that percent-encoded characters in object keys are preserved. Fixes issues where there retrieving data returns a 404 when there are slashes in s3 path (#1516 by @subkanthi)
Iceberg partitioning fix (ClickHouse#96620 by @scanhex12 via #1579)
Export Partition - release the part lock when the query is cancelled (#1593 by @arthurpassos)
Fix row policies silently ignored on Iceberg tables with PREWHERE enabled (#1597 by @mkmkme)

Fixes export part / partition tests failing under db disk integration test suites because those tests require MinIO traffict to be blocked and db disk relies on remote metadata stored in MinIO/s3 for plain merge tree tables, causing a deadlock and the suite to time out (#1478 by @arthurpassos)

And ALL Antalya features from previous releases

Available for both AMD64 and Aarch64 from builds.altinity.cloud/#altinityantalya as either .deb, .rpm, or .tgz

Full Changelog: github.com/ClickHouse/ClickHouse/compare/v26.1.6.6-stable...Altinity:ClickHouse:v26.1.6.20001.altinityantalya