Disable use of bindvariables

Hy
I use ojb with an oracle DB.
Usualy I create my dynamic SQL's by great hirarchical Criterias. And create a new ReportQuerry.

ReportQueryByCriteria rq =
        QueryFactory.newReportQuery(
          TFoto.class, new String[] { "fotoId" }, crit, true);

But in one special querry the Optimicer from Oracle produce a very bad Executionplan becos he dont now the concret Value of the bindvariables in my SQL.

Now I'm seatching vor a option wher I can disable the use ob bindvariables. So that the created SQL includes the concret values instat of bindvariables.

Sample:
select * from table where col_id = :a; -> thats with bindvariables
select * from table where col_id = 1526; -> thats with concret value


Is there someone who can help my? Thanks


Berner Martin