clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
Triage Issues!
When you volunteer to triage issues, you'll receive an email each day with a link to an open issue that needs help in this project. You'll also receive instructions on how to triage issues.
Triage Docs!
Receive a documented method or class from your favorite GitHub repos in your inbox every day. If you're really pro, receive undocumented methods or classes and supercharge your commit history.
C++ not yet supported66 Subscribers
Add a CodeTriage badge to clickhouse
Help out
- Issues
- Recursive CTE over a remote/Distributed table never converges when the join to the working table is GLOBAL (`prefer_global_in_and_join = 1`): TOO_DEEP_RECURSION
- Merge over Distributed: a constant-folded expression in a joined subquery throws 44 `non constant in source stream but must be constant in result`
- `toString` claims injectivity for every type: DST fold splits one GROUP BY key
- CBO underestimates multi-key GROUP BY cardinality using max single-column NDV
- Support per-column compression codecs in projections
- 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
- 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
- Docs
- C++ not yet supported