clickhouse
https://github.com/clickhouse/clickhouse
C++
ClickHouse is a free analytics DBMS for big data
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- Issues
- Cherry pick #96790 to 25.3: Fix crash in ifNull with Variant argument used in GROUP BY
- Cherry pick #96790 to 25.8: Fix crash in ifNull with Variant argument used in GROUP BY
- Cherry pick #96790 to 25.11: Fix crash in ifNull with Variant argument used in GROUP BY
- Cherry pick #96790 to 25.12: Fix crash in ifNull with Variant argument used in GROUP BY
- Cherry pick #96790 to 26.1: Fix crash in ifNull with Variant argument used in GROUP BY
- Patch parts (lightweight updates) not merged with base parts during background merges
- Support Iceberg v3 nanosecond timestamp types (`timestamp_ns`, `timestamptz_ns`)
- Cherry pick #96878 to 25.3: Fix exception in window functions with group_by_use_nulls and CUBE/ROLLUP
- Impossible to access some columns from a subquery reading data from parquet files with inconsistent schema
- Fix weird Iceberg `CREATE TABLE...` behavior.
- Docs
- C++ not yet supported