clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- clickhouse-disks doesn't delete blobs from object storage
- Drop of a JSON column runs for hours re-writing everything
- Use `llvm-project` 22.1.1
- Lazily apply selector and replication indexes in join with selective limit
- Enable new analyzer for `MutationsInterpreter` (vibecoded version 3)
- Add MergeTree skip index support for JSON paths using JSONAllPaths with bloom_filter, tokenbf_v1, ngrambf_v1, and text (inverted) index types
- Vector index does not work for distributed table
- Distributed index analysis for text index [WIP]
- Improve canceling queries in ExpressionTransform and NumbersRangedSource
- Add distributed Redis-backed query result cache with stampede protection
- Docs
- C++ not yet supported