DataMapper ORM v1.8.2

[eluser]WanWizard[/eluser]
Datamapper doesn't have it's own database layer, it uses CI's Active Record to interact with the database. So it supports whatever CI supports in terms of RDBMS platforms.

I've never used CI in other then MySQL environments, so I can't comment on how good CI is with MSSQL.

It also depends a bit on the version of MSSQL. It uses Transact SQL, which is a dialect different from MySQL, which has some language constructs missing that are often used. In particular LIMIT and OFFSET. I'm not sure CI can emulate that. If not, you're out of luck because Datamapper requires them in a lot of situations.

I know the latest release(s?) do support LIMIT and OFFSET, so you don't have to craft your own TOP queries anymore.