Making pagination efficient with first function.

[arpancodes]

PR Info

• Closes Cursor Based Pagination sea-orm#300

• Dependencies:
  • This PR will help optimise the fetch_page in https://github.com/SeaQL/sea-orm

Adds

• first function to the SelectStatement struct.
• Corresponding tests for mysql, postgres and sqlite

Improves

This will improve the pagination.

[tyt2y3]

I think this PR is opened at the wrong repo. first essentially is the same as limit, so no reason to add it here.
It is more logical to put it in the SeaORM's Selector* structs' API, although if needed you can also add some features to sea-query.

[arpancodes]

Should I create a new function in paginator.rs @tyt2y3?

[ikrivosheev]

@tyt2y3 @arpancodes I think we can close this PR?

[tyt2y3]

I think we can close this PR?

Agreed