clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- `DELETE ... IN PARTITION` partition clause silently ignored for `EmbeddedRocksDB` and other `supportsDelete()` engines
- CI: Add SQLancer++ check
- Perf regression: QueryConditionCache ineffective in self-joins (since #94062)
- `interval_conversions` vector has wrong values causing `CAST` from smaller to larger interval units to return incorrect results
- `NegativeOffsetStep` missing from `nodes_affect_order` causes ORDER BY to be incorrectly removed
- `IcebergLocalDefinition::object_storage_type` incorrectly set to `azure` instead of `local`
- Handle non-constant RHS for `IN`
- `CLONE AS SELECT` silently ignores `CLONE` keyword instead of throwing error
- `writeDateTime64FractionalText` truncates significant digits for scale > 6
- `enforce_strict_identifier_format` bypassed for `to_table`/`from_table` in ALTER PARTITION commands
- Docs
- C++ not yet supported