clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- failpoints_disabled_in_tests check wrongly exempts no-parallel-replicas tests
- `clickhouse_json`: an AST carrying both `alias` and `parametrised_alias` formats as one query and executes as another
- Text index on `FixedString` with `String`-returning preprocessor drops all rows
- Text index prunes matching rows: decline keys on needle padding, not value's
- Do not let unrelated TTLs postpone fully expired part drops
- fix(ci): stop no-parallel-replicas tests from passing the failpoints check
- Serve `hash`, `parallel_hash` and `auto` with the partitioned hash join
- HTTP: a pipelined request is silently dropped and the client hangs
- Wrong results for String vs Enum ordering comparisons folded to constant
- Allow custom databases to support refreshable materialized views
- Docs
- C++ not yet supported