Allow defining columns of the view

[bastien-phi]

When creating a view, it could be useful to define the columns before the query.

create or replace view "test_623632" ("column_449989") as select random()

Real-life use case of this : I want a view to be created as a union query of different tables. Some columns have to be renamed, other defined with static values, ... It would be possible to do it without defining the columns before the query but the syntax of the query would become very heavy.

This syntax is borrowed from staudenmeir/laravel-migration-views (https://github.com/staudenmeir/laravel-migration-views) but the two packages are not compatible.

[tpetry]

The materialized view would need the columns param too to be consistent with the other ones.

[bastien-phi]

Here it is !

[tpetry]

Thanks for your work Bastien, again. Its released as 0.32.0

[bastien-phi]

Always fun to contribute ! Actually, I needed this for my current project 😅