clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Exact-size parallel_hash build to avoid rehashing on cold builds
- Avoid copying data for the NONE compression codec when writing
- TTL CLEAR INDEX for MergeTree parts
- Fix parseDatabaseAndTableNameOrAsterisks: reject db*.table as invalid syntax
- Set thread count for hand-assembled completed pipelines (PARALLEL WITH, Distributed INSERT SELECT)
- Fix LOGICAL_ERROR in parallel replicas for window function over a constant subquery
- `INSERT` that leaves a cyclic `DEFAULT` chain to defaults raises `UNKNOWN_IDENTIFIER` instead of `CYCLIC_ALIASES`
- Fix flaky hang in ThreadPool.GlobalFull1/GlobalFull2 unit tests
- More KeeperStorage refactoring
- [CI crash] S3 PutObject request failed during backup process
- Docs
- C++ not yet supported