clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Progress bar flickers if a command line tool outputs a lot of data
- Universal port to handle Native and HTTP requests
- With `send_logs_level` in `clickhouse-local`, logs are not printed in the presence of an exception.
- Insert named tuples requires ordered items
- Make allow_s3_native_copy smarter
- A line length limit in `clickhouse-format`
- Script for analyzing existing tables that makes suggestions for data types based in the data
- Parquet filter push‑down: no pruning when Float32 column is compared to Float64
- Reading empty CSV results in a NOT_FOUND_COLUMN_IN_BLOCK
- Aggregate function for filtering top k values for each index in arrays
- Docs
- C++ not yet supported