clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Extend reading in reverse order with FINAL to Merge tables and topKThroughJoin
- Fix replicated database log retention check overflow
- Make the lazy-load table stand-in transparent to system tables, DML and `BACKUP`
- TTL merge silently drops a whole part based on ttl.txt written by pre-fix versions with the DateTime overflow bug, without re-evaluating rows with the fixed expression
- Simplify column statistics configuration: Remove explicit statistics DDL
- Correct the global memory tracker from a measurement by default
- Fix wrong `DISTINCT` results with `WITH FILL` when a generated row defaults a sort key
- Prometheus HTTP API: implement /api/v1/status/buildinfo
- Speed up toYYYYMMDDhhmmss for DateTime and Date columns by keeping the column's type in the calendar decomposition
- Do not lose the Variant discriminator when a constant IN set is built
- Docs
- C++ not yet supported