clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- optimize_arithmetic_operations_in_aggregate_functions may skew results because it moves overflow
- Functions related to getting the registered domain (without using publicsuffix.dat private domains)
- Successful insert generates 3 unexpected (and weird) system errors
- Clickhouse Keeper's secure <raft_configuration> port doesn't use openSSL server config settings
- (suspected) Manually damaging the filesystem cache could lead to infinite retries.
- Bad error message when mutating non-existent column
- Lock order inversion in `OvercommitTracker`, `ProcessList`, `DiskAccessStorage`, `QueryStatus` and `Context`
- ParallelFormattingOutputFormat: limit memory consumption
- The ngrambf_v1 index, dependent on the window size, can yield inconsistent results for LIKE queries on strings that contain backslashes.
- cramersVMatrix, theilsUMatrix analogues to cramersV functions (crosstab)
- Docs
- C++ not yet supported