clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- S3_ERROR While executing MergeTreeSelect(pool: PrefetchedReadPool, algorithm: Thread)
- Add support for generating ULID from a timestamp
- Add information about data types specifics in system table
- MATERIALIZE TTL mutation can remove `.sparse.` files for column, and produce broken parts
- SQL Security not use invoker if view is based on distributed table.
- Simpler way to force recalculate checksums.txt (for Replicated tables especially)
- MATERIALIZE COLUMN with different default value can be run on column from PARTITION BY (and by this break partitioning)
- `cluster/clusterAllReplicas` queries will reuse connections from connection pool
- Logical Error: Column description is empty and it can't be built from sample from table
- Doc: `concat(...)` vs `x || y`
- Docs
- C++ not yet supported