clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix `S3Queue` `ALTER TABLE ... MODIFY SETTING` applying unconverted and unvalidated values
- Fix leaked inner table metadata on `CREATE OR REPLACE MATERIALIZED VIEW` in a `Replicated` database
- Fix query parameter aliases being dropped inside parentheses and function arguments
- Do not cache count-from-files results under row filters.
- Check for cancellation between constant folds and inside `arrayResize`
- Send the temporary tables a query reads to the replicas of cluster table functions
- Apply server-wide limits through the implicit root workload
- Record non-replicated deduplication block IDs only after the part is committed
- Take serializations of simple types from the cache in `SerializationDynamic::deserializeBinary`
- Text index: posting lists of a token present in every row are decoded row id by row id; building them from their row ranges makes such queries up to 96% faster (pfor)
- Docs
- C++ not yet supported