clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Search long integer slices in 512-byte chunks on AArch64 in `hasAll` and `hasAny`
- Keeper: refuse to roll back committed log entries
- UNIQUE KEY: merge
- Fix `arrayIntersect` matching `Tuple` and `Array` elements whose integer or date values change when cast to the common element type
- Fix wrong result when a `sumIf` alias is referenced more than once
- Compare `Nullable` sort keys with one virtual call in the multi-column sort cursor
- Reject non-`UInt8` arguments of `__bitSwapLastTwo` during analysis
- Check that PREWHERE is covered by the query condition cache key, not only deterministic
- Plain `MergeTree`: `REPLACE PARTITION` and `TRUNCATE` in a transaction keep the deduplication block IDs of removed parts, so a later identical `INSERT` is silently dropped
- Do not deduplicate an insert against parts removed by REPLACE PARTITION, MOVE PARTITION or a transactional TRUNCATE
- Docs
- C++ not yet supported