clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Nullable dict key + transform_null_in: declined rewrite loses PK pruning
- Feat: Add `INSERT ... BY NAME`
- Feat: Add `UNION ALL BY NAME` support
- Add background jobs to clickhouse-client
- Reduce the PromQL count_values test's query depth to fit the TSan stack budget
- Update NuRaft to fix abandoned-peer rejoining
- `formatQueryFromJSON`: `SYSTEM` commands with a mandatory table accepted without `table` — `chassert(table)` in `ASTSystemQuery::formatImpl`
- `formatQueryFromJSON`: `SystemQuery` accepts `query_type` `UNKNOWN`/`END` — formatter throws `LOGICAL_ERROR`
- Backport #117584 to 26.6: Fix attach tables & total rows stats for data lakes
- Fix minmax skip index dropping granules for a Dynamic column
- Docs
- C++ not yet supported