clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- deduplication_path for attach/replace should include src table name
- EXPLAIN SYNTAX with old analyzer ignores SQL SECURITY DEFINER for parameterized views
- max_temporary_data_on_disk_size_for_query/_for_user not enforced on external sort spill in 26.2.4
- `TTLDrop` merge opens all source parts and allocates buffers instead of just dropping them
- PostgreSQL engine / postgresql() silently drops rows for UUID range predicates (>=, >, <=, <)
- Backport #105303 to 26.3: Fix long queries for unity
- Backport #105303 to 26.4: Fix long queries for unity
- Backport #105303 to 26.5: Fix long queries for unity
- Apply exact row-positioning for vector search rescoring queries
- Populate ProfileEvents for executable UDFs via wait4
- Docs
- C++ not yet supported