bods doesn't push down derivation logic to database if the field is from inner source

Hi,

I have a scenario where I am joining 2 tables say Table1 and Table2.It's a left outer Join where Table1 is the driver(all records from table1).say I am mapping a Field from Table2 which is name as nvl(Table2,name,'abc') .With this when I get the optimized sql I can't see the nvl there.however when I map it from the driver table say as  nvl(Table1,name,'abc') it generates the optimized sql which has the nvl in it as well.really BOSA should be able to generate a sql with the nvl under scenario 1 as well .has anyone come across this yet .

My BODS version is 4.2 .