clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Natural sort perf
- Optimization of `GROUP BY` in the presence of `ORDER BY` and `LIMIT`
- Add `ipcrypt` functions for format-preserving IP address encryption
- Add settings for SQL compatible behaviour of `SEMI` and `ANTI` joins
- Enable CREATE TABLE <new_table> AS <source_table> [ON CLUSTER '{CLUSTER}'] to implicitly set the Replication path to name of new_table
- Fix hang in `--queries-file` / `-q` when stdin is a pipe with no data
- Change SSM parameter
- MergeTree table setting refresh_parts_interval has unexpected/undocumented behavior
- Idea: add `port_offset` configuration parameter
- LazilyReadFromMergeTree optimization is disabled when selecting ALIAS columns
- Docs
- C++ not yet supported