clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix `RENAME COLUMN` rebinding renamed references to an alias or a lambda parameter
- Do not apply a killed mutation to a MergeTree part whose task had not started yet
- Fix stale query condition cache results after a metadata-only ALTER of a column
- Iceberg `OPTIMIZE TABLE` commits a new snapshot instead of rewriting the table
- [DO NOT MERGE] JIT-compile lambda bodies with plan-based parallel replicas, and keep indexes over compiled lambdas usable
- Fix FileLog reading a replaced or rotated file from the old file's offset
- Always use StringZilla's NEON substring search on Arm
- Reuse an expression computed below a JOIN for its key
- Treat functions written without parentheses (`now`, `today`) as non-deterministic in mutations
- Fix index analysis dropping the padding of `FixedString` constants and `IN` set elements
- Docs
- C++ not yet supported