clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Distributed index analysis for text index [WIP]
- Add Redis-backed query result cache with stampede protection
- Add `array_join_use_nulls` setting for `LEFT ARRAY JOIN`
- S3 table storage results in InvalidObjectName error
- parallel_distributed_insert_select=2 falls back to single-node writes when SELECT has a GROUP BY, even for Summing/AggregatingMergeTree
- Logical error: 'our_log_ptr < max_log_ptr'
- Introduce `system.iceberg_files` table
- Cannot add COMMENT for a sign column of an existing CollapsingMergeTree table
- DPhyp join reordering algorithm for inner joins
- feat: add database replicator to replicate databases across the cluster automatically
- Docs
- C++ not yet supported