clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- clickhouse local --ignore-error silently swallows execution errors: no message, exit code 0 — clickhouse-client prints them
- RFC: partition-wise JOIN
- Better defaults for object storage
- `Buffer` table over a `Distributed` table with a remote shard throws `THERE_IS_NO_COLUMN` for any `ALIAS` column under the analyzer
- Support the window frame exclusion
- Resolve pushed role names once per query instead of per shard connection
- `netloc` drops the host and port of a bracketed IPv6 authority: `user:pass@[2001:db8::1]:8080` yields `user:pass@`, and a bracketed host without userinfo yields an empty string
- `transform` and `CASE ... WHEN` never match a `Nullable(Enum)` value: every row silently gets the default/ELSE result
- Fix equals behavior with FixedStrings in containers
- Simplify/speed up string comparisons in arrayIndex functions
- Docs
- C++ not yet supported