Talend migration Oracle to PostGres

I am using Talend studio, testing it for a simple migration from an Oracle database to a postGres database. The two connections are ok, but I got error on insert into the PostGres database because I believe Talend generates a sql query with Double quotes instead of simple quotes. Now, I have been looking around and I do not find some solutions. Very difficult for me to believe there is not simple solution for such a simple problem (though simple problems are often the most difficult to solve ...).