clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Vector search: NOT_FOUND_COLUMN_IN_BLOCK when WHERE computes with the vector column and rescoring is off
- Honor an explicit structure argument for data lake table function reads
- ALIAS presence materialization (ALIAS MATERIALIZED NULL)
- Add `parseTimeDeltaOrNull` and `parseTimeDeltaOrZero`
- Logical error in `IColumn::assertTypeEquality` reading a `sizeN` subcolumn of a nested `Array(JSON)` path
- MATERIALIZED CTE is not materialized when queried through a VIEW
- Add Support for snappy compression
- Re-resolve a nested subcolumn name at the array level it was resolved at
- Flaky test `04640_query_log_map_columns_serialization`: `sum` over the prefetched read pool returns exactly 2^23 too much; `asynchronous_read_counters` sometimes empty in Fast test
- `SET format_avro_schema_registry_retry_initial_backoff_ms = 0` permanently bricks the session
- Docs
- C++ not yet supported