clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- RabbitMQEngine doesn't acknowledge message with empty json array
- Unexpected behavior of CLEAR COLUMN in Memory Engine starting from 23.11
- JOIN Engine with SETTINGS persistent=0 creates empty files in tmp table dir
- data duplicate issue
- system.tables -> metadata_path field changed behavior after 25.1
- read_in_order doesn't work with view if ORDER BY function(column)
- Automagically apply some functions to columns in ORDER BY, if func(column) present in ORDER BY and it will trigger ReadInOrder
- `FINAL` modifier in subqueries fails unexpectedly with `WHERE false LIMIT 0`
- memory_usage / peak_memory_usage from processlist/system.processes table reporting wrong numbers leading to Memory Limit Exceeded Exceptions.
- File function - ability to read corrupted archives on the best effort basis
- Docs
- C++ not yet supported