clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Column aliases are not resolved properly in the resultset when joining multiple tables with ambiguous columns
- https://yandex.ru/dev/clickhouse/ web page is outdated.
- Engine=Kafka consuming several topics "Exception during commit attempt: Local: No offset stored"
- Support Lowcardinality(String) for summingMergTree Nested (sumMap)
- Name of the problematic table and column for insert time exceptions
- Not obvious error message [Attempt to read after eof: while converting '' to Int32]
- allow_ddl option is not consistent over restarts
- Directory for table data [...] already exists on replicated table in case of disk failure
- Atomic inserts (on parts level) to main table and all dependant Materialized views
- ARRAY JOIN with LIMIT BY can be optimized
- Docs
- C++ not yet supported