clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Lost Constant type for column when using accurateCastOrDefault function
- Cherry pick #99380 to 25.3: Fix ignoring of TABLE_UUID_MISMATCH for non analyzer
- ThreadSanitizer: data race (STID: 1367-305e)
- Logical error: 'Inconsistent AST formatting: the query: (STID: 1941-1bfa)
- NULL values from INSERT INTO...SELECT...FROM S3()
- Local replica or shard cannot be skipped in the case of missing table.
- Support query parameters in clickhouse-benchmark
- Analyzer: Query silently returns 0 rows due to incorrect filter pushdown with ARRAY JOIN (bypassed by 1=1 AND)
- Bypass proxy for interserver communication - part fetch
- Optimize `cutURLParameter` by eliminating unnecessary memory shifts
- Docs
- C++ not yet supported