clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Make the analysis of matchers over long JOIN chains with `join_use_nulls` no longer cubic
- VirtualRowTransform throws NOT_IMPLEMENTED on lambda column (Code 48)
- Fix(Map): Find NaN keys in bucketed maps
- Read `create_time` of a replication log entry correctly in the hour repeated at the end of DST
- Perf(Array): Add wide integer fast paths to arrayCompact
- Fix MongoDB pushdown for Boolean and numeric comparisons
- 26.9: Row-format inserts into nested Tuple tables are up to 3x slower (Kafka ingest 1.8x)
- Optimize skipping delta-encoded parquet values
- Filesystem cache background download bypasses workload IO scheduling
- UTC-bounded DateTime64 window mishandles late 9999-12-31 values behind UTC
- Docs
- C++ not yet supported