clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Query Batching (Aggregation)
- LOGICAL_ERROR with materialized CTE
- IcebergS3: write_full_path_in_iceberg_metadata writes S3 key path instead of full S3 URI in manifest entries
- IcebergS3: Parquet files written without PARQUET:field_id metadata, breaking Trino column mapping
- `MutationsInterpreter::Source::read` data path passes `_table` to `createReadFromPartStep`, causing `NO_SUCH_COLUMN_IN_TABLE` exception
- `ObjectJSONNode::insertResultToColumn` null-object path calls `column.insertDefault` bypassing type-aware Enum default
- Avoid lock contention from background fetch threads in getMutationsSnapshot
- Query parameters with Identifier type not supported in ON CLUSTER clause
- Flaky test: test_storage_kafka/test_batch_slow_6.py::test_kafka_rebalance[generate_new_create_table_query-{}.*Saved offset]
- Async Insert Batching per Partition
- Docs
- C++ not yet supported