clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Unify columns definition and usage for CI Logs, add `workflow_start_time` column
- `count()`/`sum()` without `GROUP BY` returns zero rows instead of one when a single-shard `Distributed`/`Remote` table's only shard is skipped via `skip_unavailable_shards`
- Text index: accept arbitrary LIKE/ILIKE patterns for the array tokenizer
- Fix substreams cache key collision between streams of one column
- Expand `url` glob patterns lazily
- Fix integer overflow in String deserialization
- Make Parquet dictionary-filter pruning cheaper: sorted hash vector, no per-value Field
- Reject invalid subrequests in ZooKeeper multi requests
- Revert "Do not build statistics for non-physical columns"
- Fix integer underflow in MySQL protocol handshake
- Docs
- C++ not yet supported