clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Hide secret arguments in `EXPLAIN AST` output
- JIT `bitShiftRight`/`bitShiftLeft` skip the out-of-range shift clamp
- Relaxed `has` rule accepts a `Dynamic` key, so a matching row is pruned
- A rank() <= N filter above a window sorts every row to compute ranks it discards: bounding the window sort per partition is 16% faster on TPC-DS query_67
- Don't share a query-context-dependent serialization through DataTypesCache
- Let `estimateReadRowsCount` keep an index analysis taken before filter pushdown off the read step
- LDAP: search-and-bind with a service account, `memberOf` role mapping, exclude list, and synchronization of users and roles
- Fix a view returning only the seed row when a recursive CTE is shadowed by a same-named plain CTE
- Add sparse encoding for JSON typed paths with Object V4
- Revert "Revert "Fix wrong results for `plus`/`minus` keys with a non-integer operand""
- Docs
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