Oracle to Postgress Migration

[DAVID ROTH]

Has anything been published on Oracle to Postgress migration.

I am finding plenty of information about schema migration but,
I think this is the easy part.
I have a a tremendous amount of SQL and PL/SQL code that needs to be 
translated.  I know Oracle "packages" will not translate.  DECODE is not 
standard and will need to be rewritten as CASE.  I have seen feature/function 
translation matrices to/from Oracle and other database but I can't seem to find 
one for Postgress.
Please point me in the right direction.
Dave