clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- #91631 / Extension of CREATE TABLE IF NOT EXISTS ... AS SELECT
- Add restore_table_data, restore_access_entities, restore_functions settings for RESTORE
- feat: sql cluster interface
- FORMAT Statistics/Metadata
- Multi join by single key optimization
- Avro format, message name indicator for union type
- Query Batching (Aggregation)
- IcebergS3: write_full_path_in_iceberg_metadata writes S3 key path instead of full S3 URI in manifest entries
- `MutationsInterpreter::Source::read` data path passes `_table` to `createReadFromPartStep`, causing `NO_SUCH_COLUMN_IN_TABLE` exception
- Avoid lock contention from background fetch threads in getMutationsSnapshot
- Docs
- C++ not yet supported