clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix mapKeys bloom_filter index over-pruning for FixedString default equality
- Throw a clear error when a marks file listed in checksums is missing on disk
- Refresh TO-target materialized view columns when upstream tables are altered
- Support group_by_use_nulls in WITH TOTALS
- Fix minmax skip index and partition pruning skipping NaN under negated float ranges
- Fix wrong result for duplicate-named subquery columns wrapped in SELECT *
- Fix race between quorum failure cleanup and GET_PART queue entries.
- [Experiment] Reduce size of hashtable by demoting some of keys from hash to post filter step
- Silent data loss: bare Array(T) in AggregatingMergeTree keeps one row's value during merge
- Inserts to MVs are dropped - Happens on chained Mvs down the chain.
- Docs
- C++ not yet supported