clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- S3 request with non existing URL hanging forever
- Support `count_distinct_implementation` rewrite for all aggregate function combinators(ie -State/-Merge)
- Limit max_insert_threads by available memory.
- No data propogated to Materialized View if column names mismatch
- Suggest clickhouse integrate with sqlite engine in the future
- When the port of a cluster node is dynamically updated, inserts into the distributed table do not work until you restart Clickhouse
- Can I create skip index on Array Of Tuple fields
- max_ast_elements is not accounted when expending complexe direct dictionary dictGet.
- Failed to Update or Delete Table data ,I tried to delete the is_done = 0 mutations and then delete again but still couldn't ,
- Using dictGetDescendants in query with UNION ALL seems to slow down linearly with number of unions
- Docs
- C++ not yet supported