## Release Notes: sea-query 1.0.0-rc.22

*(since 1.0.0-rc.20)*

### New Features

* Support for index column operator class https://github.com/SeaQL/sea-query/pull/1014
* Implement `DROP COLUMN IF EXISTS` for Postgres https://github.com/SeaQL/sea-query/pull/996
* Wrap expressions in parentheses in the `DEFAULT` clause https://github.com/SeaQL/sea-query/pull/998

### Enhancements

* Move aggregate methods and `if_null` to `ExprTrait` https://github.com/SeaQL/sea-query/pull/1002
* Re-export stronger-pinned third-party types https://github.com/SeaQL/sea-query/pull/1012
* Add nullable value classes
