How to use a Parameter while polling a table (DB Adapter)

Question

Hi
BPM 10.1.2.02
my bpel process polls a table for changes. i need to trigger the process only for specific data.
ex - i need to pickup data only which have a modified date of today (ie sysdate), how do i accomplish this ..the only 2 options im getting in EDIT EXPRESSION is Literal and query key.
if this is not supported by BPEL the work around for this is to create a view on the table but i saw the following in HELP but could not figure out where its comming from ....i dont see the "Parameter " option in the db adapter config.
Choose the expression and enter data in each field: First ArgumentClick Edit and select the query key for the first argument. See "Adding Arguments" for more information.OperatorSpecify how TopLink should evaluate the expression. Valid operators include:Equal Not Equal Equal Ignore Case Greater Than Greater Than Equal Less Than Less Than Equal Like Not Like Like Ignore Case Is Null Not Null Second ArgumentSpecify the second argument:Literal - Click Edit and choose a literal type and value. Query Key - Click Edit and select the query key.Parameter - Choose a previously created parameter argument.

Answer 1

Mahima.
You have almost same statement as Sundar has. This is not Bind variable as William said you can not use bind variable for structral name. this dynamic sql but withid bind variable (that is not USING the USING clause)
somthing like this
excecute immediate 'select * from emp
where empno=:1' using 10;here :1 is bind variable