clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Cache for "shared"/"reused" data of WASM UDF
- Fix `max_rows_to_read_leaf` incorrectly applied to local non-distributed queries
- generateSerialID blocks indefinitely on Keeper quorum loss -- inconsistent timeout behavior
- Column IDs for instant RENAME/DROP in non-replicated MergeTree
- Refuse to materialize columns used in sort key expressions
- feat: support `system.connections` table for client connections metadata
- Add fuzz targets for compression codecs, NativeReader, DataTypes, and WASM
- Fix cancelation of mutation task after `KILL MUTATION`
- Auto-enable uncompressed cache for MergeTree reads
- Add replacing_merge_cleanup_period_seconds experimental setting for ReplacingMergeTree
- Docs
- C++ not yet supported