clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix LOGICAL_ERROR on duplicate __join_result_dummy when deserializing a distributed join plan
- Make CREATE MATERIALIZED VIEW ... POPULATE atomic
- Detect when tables behind a query have changed
- Add skewPopStable, skewSampStable, kurtPopStable, kurtSampStable aggregate functions
- Fix DateTime64 parser consumes Bool column value when small epoch
- Speed up variance and standard deviation over Decimal columns
- random load balancing appears to be favoring one replica over the other
- Parallelize column_modification_time computation in system.parts_columns
- Support `GROUPS` frame mode for window functions
- Fix allocator abort in validateColumnOfFixedSize for huge index_granularity
- Docs
- C++ not yet supported