clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Building a String set from a Date, DateTime, UUID, IPv4, IPv6, Decimal or Float constant uses the query-text rendering: `'18262' IN (toDate('2020-01-01'))` returns 1 and the real date string never matches
- Fix logical error for a constant-condition `if` GROUP BY key under `group_by_use_nulls`
- ATTACH TABLE ... UUID ... ENGINE = ... accepts MergeTree definitions that CREATE TABLE rejects
- Attach the correlated-subquery set builder below the materialized CTE steps
- Use `clang-23`
- Query condition cache serves another session's verdict when a conversion captures a session setting (precise_float_parsing) not in the cache key: rows silently vanish
- Fix `optimize_rewrite_regexp_functions` turning a multi-match `replaceRegexpAll` into `replaceRegexpOne`
- Do not rewrite the sharding-key `IN` set in the `SELECT` projection
- Treat a bare table identifier on the right of `IN` as a deferred set for mutation pruning
- Do not rewrite a comparison chain into `IN` across `String` and `FixedString`
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