How to populate only the first record by default when the page opens?

Dear Members,
I am using OAF R12 and my requirement is as follows:-
When the user opens the custom OAF R12 page, I just want to query the first record from the underlying VO.
For example, If the table has 10 rows, I just want to query the first row as soon as the page opens.
I have written the below code:-
Process Request Method of the CO:-_
am.invokeMethod("initHeaders");
Code in AM_
public void initHeaders()
HeadersVOImpl hVO = getHeadersVO1();
hVO.initQueryHeaders();
Code in VO_
public void initQueryHeaders()
executeQuery();
As it is very clear that with the above code all the records will be queried. I have to add something before the executeQuery() method in the VO to just query the first record.
Can any one please help me by guiding me what I should add before the executeQuery() method in the VO?
Many thanks in advance.
Regards,
R4S.

Hello Gyan,
Many thanks for your reply.
The below line in your code is throwing incompatible type error:
OARow row = vo.first();
Can you please help me.
Regards,
R4S

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