clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Register a full URI as the location of Iceberg tables created in a ca…
- Read the table name once per block in Kafka, RabbitMQ, NATS and FileLog sources
- Fix the query cache and `view` mixing up tables whose dotted names coincide
- EXPLAIN PLAN tree = 1: show the step details in the boxes, skip Expression steps
- DNSCacheUpdater spins forever (100% CPU, holds DNSResolver mutex) in `CaresPTRResolver::wait_and_process` after the DNS server port becomes unreachable; `SYSTEM DROP DNS CACHE` and shutdown hang
- Docs: fix BigQuery ClickPipe data type mapping
- Omptimize memory cost for TopK through JOIN and ARRAY JOIN
- Cherry pick #128248 to 26.8: Leave the row estimate of a filtered array join unknown in join reordering
- Use the `text` index for `arrayJoin(col) = const` and `arrayJoin(col) [GLOBAL] IN (set)`
- Cherry pick #128248 to 26.9: Leave the row estimate of a filtered array join unknown in join reordering
- Docs
- C++ not yet supported