clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Revert "Revert "Mark a query as cancelled in the process list when its TCP client cancels it""
- Keep the parts removed by TRUNCATE for old_parts_lifetime
- Fix NATS stream error mode for messages with multiple rows
- Add sanity checks and memory-tracked containers to query plan deserialization
- Resolve subcolumns of dotted column names when recomputing MATERIALIZED columns
- Keep aggregate states in `AlignedBuffer` on their own cache lines
- Remove the redundant filter column check from canInplaceFilter
- Read the lazily materialized columns of object storage files in parallel
- Keep the alias of a subcolumn when recomputing a MATERIALIZED column
- Support SQL NULL semantics for scalar `IN`
- Docs
- C++ not yet supported