clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Add the rows of a sparse argument in their order for order-dependent aggregate functions
- Log only final S3 request errors with level error, everything else with info/trace
- Seal-gated reading: put the runtime filter into the join seal only once it is complete
- Send a subquery with a redundant `ORDER BY` to parallel replicas as a whole
- Pair reads by table for automatic parallel replicas over nested aggregations
- Add integration tests pinning down SQL injection via PostgreSQL pushdown
- `KILL MUTATION` fails with `SYNTAX_ERROR` on commands mangled by masking rules
- Default value instead of exception in insert...select
- Fix `INSERT SELECT` storing the column default for a non-NULL value that cannot be converted
- Count distinct bytes in `stringBytesUniq` without a per-row stack bit mask
- Docs
- C++ not yet supported