clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix MaterializedPostgreSQL database/table with ON CLUSTER
- Pin patch parts in MUTATE_PART log entries for deterministic mutations
- Fix doubled written_rows for INSERT into Distributed with local shards
- Incremental aggregation for sliding window frames via a FlatFAT-style aggregate tree with per-level suffix caches
- Add `aiRedact` function for PII detection and redaction
- Recalculate TTL when a mutation updates a DELETE WHERE column
- Text index not used for `match()` regexps that contain a mandatory literal (`OptimizedRegularExpression::analyze` misses several equivalent spellings)
- Fix materialized CTE self-reference in set operation
- New Tokenizer for Map Key Value pairs
- EXPLAIN SYNTAX: return a single record (default on)
- Docs
- C++ not yet supported