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Connection conn=null;
        CallableStatement stmt=null;
        try{
            conn=ei.getSession().connection();
            stmt=conn.prepareCall("{? = call "+functionname+"}");
            stmt.registerOutParameter(1, Types.VARCHAR);
            stmt.execute();
            return stmt.getString(1);
        }catch(Exception ex) {
            throw ex;
        }finally {
            try{
                if (stmt!=null)
                    stmt.close();
                if (conn!=null)
                    conn.close();
            } catch(SQLException se) {
            }
           
        }
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import java.sql.Statement;
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