Need true "alter" script style for forward databases

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So far, I can only "forward a database" by recreating it. Would be nice if 
possible to just apply the changes to existing schema.

For example, if user rename a column, when generating forward script, if the 
column already exists in the old name, then it shall provide the 

alter table XXXX rename column YYYY to PPPP

etc.

Regards,

Edson

Original issue reported on code.google.com by brvik...@gmail.com on 6 May 2014 at 11:02