W_DUAL_G - how is it populated

Question

Hi All,
I was wondering how W_DUAL_G table gets populated.
I installed OBI Apps in three environments some time ago.
In one I had the W_DUAL_G empty (MSSQL), in the second there was just one row (Oracle) and in the third one I had over 500 rows (Oracle).
Should that table be populated while creating OBAW schema or is there any customized script to do it?
There is not much information in the documentation,
Thank you for any inputs,

Answer 1

Thank you for your answer,
To be honest I had already checked it before - it seems I had run a couple of random tests in different environments long time ago and that where different results came from.
Thanks again,
Regards..