clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Insert into JSON with hints is much slower.
- Add `arrayPartialAutocorrelation` function
- Dynamic cluster discovery crashes on ZNONODE when /shards znode doesn't exist yet during cluster creation
- `syncReplicatedDatabase` does not pass `sync_replica_mode` to `waitForReplicaToProcessAllEntries`
- `DESCRIBE SELECT ... SETTINGS` has SETTINGS swallowed by inner `ParserSelectWithUnionQuery`
- `ParserKillQueryQuery` missing `tryGetAlias` check allows parenthesized aliases causing LOGICAL_ERROR in debug builds
- `StorageFromMergeTreeProjection::getStorageSnapshot` poisons parent snapshot cache with projection metadata
- `untuple` inside SQL UDF loses named tuple field names with new analyzer
- Query Optimization: Aggregate is not pushed down through subquery on a Distributed table
- Flaky test: 02428_parameterized_view
- Docs
- C++ not yet supported