clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- 'Missing columns' when do MATERIALIZE COLUMN referencing the ALIAS columns
- FORMAT JSONColumns answers with 'text/plain' instead of 'application/json'
- `ALTER TABLE ... ON CLUSTER ... FETCH PARTITION` not implemented?
- Support input data for reading from the `URL` table engine
- REPLACE PARTITION ... FROM ... waits for the merges in unaffected partitions
- Allow vertical merges for TTL
- Error 'File recursively imports itself' with Kafka Engine and ProtobufSingle format
- Use ISA-L isal_zero_detect to replace memoryIsZero
- Hot load of Clickhouse keeper config file should apply to more properties
- `test_s3_zero_copy_ttl/test_ttl_move_memory_usage.py` is flaky (disabled)
- Docs
- C++ not yet supported