clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- MERGE_PARTS hang up and it consumes the huge number of RAM to merge one part
- force_index_by_date and complex partition key: add mode to require all the columns from the partition key
- A few rough edges of the dashboard.
- Change the defaults of Parquet output
- If the data format is binary, ask before outputting in terminal if the stdout is a terminal.
- Parity in features between ClickHouse Keeper and ZooKeeper
- MySQL compatibility: CAST NULL AS x
- floating point timestamp can be inserted with `Values`, but not with `JSONEachRow`
- Add support for SSL auth with named collections for MySQL
- Default value for `input_format_orc_row_batch_size` can be suboptimal
- Docs
- C++ not yet supported