ODI Variable using Variables

Does anyone know if it is possible to use a Variable inside of another variable??
first variable is Current_Sysdate which the query is:
Select sysdate
from dual
Second, I have a variable called Count_Rec: this is to count the records...
The SQL that drives this is:
Select count(r2.pn)
from register r2, pol p2
where p2.pdt =
(select max(p3.pdt)
from pol p3
where p3.pn = p2.pn and
p3.pdt = to_date('#Current_Sysdate', 'mm/dd/yyyy')) and
r2.pn = p2.pn and
r2.pdt = p2.pdt
when i test this in ODI i get an error:
Error while executing query
ORA-01858: a non-numeric character was found where a numeric was expected.
This is being caused by the "*** r3.pdt = to_date('#Current_Sysdate', 'mm/dd/yyyy')) and ***" line (I know this because if i remove this line it compiles completely)
My question is ... is it possible to use a variable within another variable in ODI??? if so does anyone have an idea what i am doing wrong here???
I realize i could just replace the #Current_Sysdate with sysdate but the idea is they may want to run this for a different date... it may not always be sysdate... so they wanted a variable in that spot...

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