clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- 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
- Remove `inplace_build_mutex`: only the planning thread builds a shared `IN` subquery set
- Keep an exact index atom for an injective key transform over a Tuple key
- Make test 05315_blob_storage_log_copy_event read system.remote_data_paths once
- Reject ALIAS columns that read themselves through a subcolumn
- Docs
- C++ not yet supported