clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Add bytes-aware read stream limit for MergeTree scans
- system.query_log tables, databases not set on trivial `count()` optimization
- RFC: Sortedness-aware join algorithm 'full_sorting_merge_if_sorted': use 'full_sorting_merge' automatically when both inputs are already ordered on the join key
- Concurrent ALTER ... UPDATE on a JSON column produces truncated subcolumn files that replicate to all replicas (CANNOT_READ_ALL_DATA), blocking table startup
- [RFC] Reclaimable memory and dynamic spilling on top of memory reservations
- CREATE VIEW privilege alone allows to create incremental materialized views
- [CI crash] TransactionLog finalizeCommittedTransaction failed
- Backport #108945 to 26.6: Don't check empty schema in SchemaProcessor
- Decouple TopK runtime skip indexes from read-time skip indexes
- Add a TOLERANCE clause to ASOF JOIN
- Docs
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