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
- Rare-filter `FINAL ... ORDER BY pk LIMIT` 1.6x slower; perf test turns it off
- Lazy materialization no longer applies to a subquery read under a row policy since 26.8 (regression from #112326)
- Partial-state shuffle merge never spills: big `GROUP BY` hits `max_memory_usage`
- Refuse `CLEAR COLUMN` while an unfinished mutation still reads the column
- ReplicatedMergeTree: ALTER UPDATE accepted on a replica with stale metadata after a concurrent RENAME COLUMN; mutation fails forever with NO_SUCH_COLUMN_IN_TABLE and wedges the table's mutation queue
- Fuse more filters into `ArrayJoinStep`: partial conjunctions and `OR` over several arrays
- Restore lazy materialization over a subquery when a row policy is the only filter
- countSubstrings*(col, const, start_pos) undercounts after a straddling match
- Text index drops `ILIKE` prefix/suffix rows matched through U+212A as `k`
- Fix reading non-integer values of SQLite tables into integer columns
- Docs
- C++ not yet supported