clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- `getIcebergType` loses nested tuple field names via `getNormalizedType` stripping explicit names
- Propagate Iceberg schema field `doc` to ClickHouse column comments in DESCRIBE output
- Deprecation guard error message at `DataLakeConfiguration::getCatalog` mentions `storage_catalog_url` but code checks `storage_aws_access_key_id`
- 26.3+ jemalloc fantom crashes due to LTO
- `checkTableNameLength` in `executeToTables` checks against source database instead of target database for cross-database renames
- Backport #101798 to 25.8: Prevent server termination when unregistering S3 client fails
- Add UNIQUE key constraint support for MergeTree (Issue #70589)
- Backport #102384 to 25.8: Coalescing merge tree fix array
- UndefinedBehaviorSanitizer: undefined behavior (STID: 2825-3dea)
- Check for stack overflow in Avro reader
- Docs
- C++ not yet supported