clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- JSON functions don't accept LowCardinality(Nullable) arguments
- `MaterializedPostgreSQL`: Support replicating `REPLICA IDENTITY FULL` tables that have a sorting key.
- Keep WriteBuffer::pos in a register across inlined writes
- Sort strings by 8-byte prefix keys first
- Non-permanent DETACH frees a table_disk root, breaking next load (#124298)
- Feat(DateTime): Support `%v` and `%x` in `formatDateTime`
- Capture the tags collector when creating `timeSeriesStoreTags` and `timeSeriesTagsToGroup`
- Fix a hang of `remote()` queries in a CPU workload with fewer slots than `max_threads`
- Fix a hang of `INSERT ... SELECT` and `WITH RECURSIVE` queries in a CPU workload
- Hybrid materialized view: incremental on INSERT, scheduled full refresh after UPDATE/DELETE
- Docs
- C++ not yet supported