MsSqlPlatform::getAlterTableSQL generates a reasonable quantity of invalid T-SQL (to my knowledge, I'd happily be corrected if wrong).
Unfortunately SqlSrv (to my knowledge) only accepts "ALTER old_old_name column_definition" and renames of tables and columns are only capable using a stored procedure.
I'm happy to produce a patch but I think I need a bit of guidance to do so more quickly
The major one is that getAlterTableSQL will need to produce multiple SQL statements, but in my testing I'm not able to get this to do so without some additional problems, and I've not yet had the opportunity to dive into the bowels of the rest of the schema bits and bobs to understand why. If anyone could point me in the vague direction that would be really handy