clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix: constant ALIAS with parallel replicas
- Projections not used when aggregate_functions_null_for_empty is set
- RFC: UUIDs with sane ordering
- Add test for assert in remove redundant sorting optimization
- Filtering conditions on partitioned tables not working as expected
- `select_shard_id`, `select_replica_id` settings to query particular shard/replica in Distributed table
- Join with remote table is not parallel
- Distributed queries slowdown when using the analyzer
- Integration tests: "Connection dropped: socket connection error: None" (slow teardown)
- `transform` should be able to output arrays
- Docs
- C++ not yet supported