clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- short_circuit_function_evaluation also for coalesce
- cluster function breaks restriction of allow_databases for system tables
- ClickHouse while inserting getting error cannot allocate memory: While executing Remote. (CANNOT_ALLOCATE_MEMORY) It looks like that the process is near the limit on number of virtual memory mappings.
- implicit_transaction can not be disabled inside session if 'transactions are not supported'
- Some useful math functions are not properly implemented for Decimal and Int{128,256}
- add table monitor about [ query_log and query_thread_log in system database ]
- Serialization error after INSERT when using implicit_transaction
- cache dictionary is not caching some keys?
- Combine aggregate and join if we can (groupjoin operator)
- Big hexadecimal numbers become garbled when inserted into the database
- Docs
- C++ not yet supported