clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Stress test: install thread-pool fault injection after the smoke check passes
- Fix aggregate projection not matched when multiple sumIf use different IN sets
- Vector similarity pk partial filter
- Fix race between ALTER RENAME COLUMN and merge causing data loss (#80648)
- Vector Similarity Index Not Used When Additional ORDER BY Column Is Present
- TRUNCATE TABLE leaves partial state after mid-rename crash on MergeTree
- DROP PARTITION / DETACH PARTITION leaves partial state after mid-rename crash
- `enforce_strict_identifier_format` does not validate constraint names due to `ASTConstraintDeclaration` bypassing `writeIdentifier`
- `max_parts_to_move=0` rejects all moves instead of being unlimited as documented
- CTE not visible in parenthesized union expressions with `WITH ... INSERT INTO` syntax
- Docs
- C++ not yet supported