clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Ignore the 05259 read-only replica fixture in the upgrade check log scan
- Keep the `SETTINGS` argument of `mysql`, `postgresql` and `ytsaurus` in the definition of `CREATE TABLE ... AS`
- Fix query condition cache reuse between filters on columns `a UInt8` and `aU Int8`
- Count the profile events of all threads of a merge in `part_log`
- Add `output_format_arrow_datetime_as_timestamp` to write `DateTime` as an Arrow timestamp
- Do not re-create nested Tuple elements when creating a column for deserialization
- `MaterializedPostgreSQL`: concurrent `ATTACH TABLE` lose updates of `materialized_postgresql_tables_list`, and the lost tables stop replicating after a restart
- A refused `DROP DATABASE` or `DETACH DATABASE` stops the replication of a `Replicated` or `MaterializedPostgreSQL` database
- Stop a query waiting for a CPU slot on `KILL QUERY` and `max_execution_time` when `cpu_slot_preemption` is disabled
- Do not read the target of a non-APPEND refreshable materialized view with parallel replicas
- Docs
- C++ not yet supported