clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Skip Parquet row groups the top-K threshold excludes while their data waits to be decoded
- Fix primary key analysis skipping rows for `toMonth`, `toQuarter`, `toDayOfYear` and `toDayOfMonth` over a `DateTime` before local 1970-01-01
- Docs: reorganize ClickHouse connection documentation
- Do not fail the version metadata check on a rollback's in-flight write
- Text index: introduce new tokens layout and `dictionary_block_encoding` parameter
- uniqApacheHLL aggregate function
- CI: cut the build profile upload into blocks of at most 256 MiB
- Fix wrong results of a multi-column `NOT IN` over a nullable column of MySQL, PostgreSQL, SQLite and ODBC tables
- Respect `short_circuit_function_evaluation` in filters evaluated while reading Parquet files
- UNIQUE KEY: pin bitmap holders on read
- Docs
- C++ not yet supported