clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- nullIf(key, sentinel) predicates build no key range — primary key / partition / skip indexes not used (mirror of #94754)
- Explain rejected skip indexes
- MaterializedPostgreSQL: prevent exported snapshot expiration during initial sync
- 'CREATE TABLE AS SELECT FROM s3Cluster' does not work in 'Replicated' database
- Recursive CTE: squash chunks before writing the intermediate table
- Support materialized CTEs in recursive WITH
- Recursive CTE: experimental USING KEY (keyed recursion / semi-naive evaluation)
- Fix outdated disk recovery log messages referencing SYSTEM RESTART DISK
- Fix/cluster discovery keeper exception
- Backport #105395 to 26.3: Fix flaky test_kafka_bad_messages::test_log_to_exceptions log-order race
- Docs
- C++ not yet supported