clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- `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
- `numericIndexedVectorPointwiseDivide`/`Multiply`: a result that rounds to zero silently drops the index from the vector instead of storing an explicit 0
- Decimal source skips DateTime64/Time64 saturation: out-of-range ticks stored
- age() off by one: ns overflow flips the sub-unit adjustment past 2262-04-11
- Docs
- C++ not yet supported