clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- TID tuple widened to 4 fields breaks system.parts/query_log queries
- SELECT in a transaction issues 4 Keeper ops per in-flight part, was 0
- Add test: Signed wide int above `DateTime` max: new saturation branch untested
- Cherry pick #117584 to 26.3: Fix attach tables & total rows stats for data lakes
- Cherry pick #117584 to 26.7: Fix attach tables & total rows stats for data lakes
- Cherry pick #117584 to 26.8: Fix attach tables & total rows stats for data lakes
- GROUP BY over a Distributed table whose declared key type differs from the shard type fails with UNKNOWN_AGGREGATED_DATA_VARIANT under two-level aggregation
- PoC: Data properties for join order cardinality cap
- Gate clears `subqueries` but not `literals`: hidden WITH alias inlined in IN
- URL table function does not heed input_format_max_block_wait_ms
- Docs
- C++ not yet supported