clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix Inconsistent AST formatting for APPLY with a matcher-valued lambda body
- Add tests for the HTTP status code of an unknown role and for a conflicting quota key
- Fix PromQL stddev and stdvar for large finite values
- Logical error: 'Unexpected return type from globalIn. Expected Nullable(UInt8). Got UInt8' in sample-block planning for a Distributed table
- Release the server status file lock when a graceful stop fails, so system tables can still be dumped
- Add coverage tests for six untested function branches
- IN with mismatched column count under `transform_null_in = 0` is only rejected at execution time: `use_skip_indexes` / index pruning / an empty table flip the query between error 20 and a silent result
- `insertBatchAtomic` discards a whole patch entry when any conflicting entry is newer, so the entry never erases the older conflicting entries it replaces — `mergedJSONPatch` returns different results for the same rows depending on arrival order
- optimize_inverse_dictionary_lookup does not work with views
- Drop lldb's loader rendezvous breakpoint before collecting stacktraces
- Docs
- C++ not yet supported