Want binary_float dimension key

Hi,
I would like to set up a star schema with binary_float dimension keys to make them much smaller than the numeric datatype. When I do, I get validation warnings in the dimensions built in OWB. Can I ignore the warnings and use the smaller binary_float datatypes or am I setting myself up for trouble later in the project. We are running Oracle 10G 10.2.0.4 on HP Unix. We have OLAP installed but I am deploying dimensions and cubes with the "Deploy Data Objects Only" option because of all of the bugs in OWB. The fact table has about 110 million rows and about 100 gig.
Has anyone used OWB with a star schema that uses binary_float surrogate keys?
Thanks
Don K.

I am using the dimension operator in the map that loads the dimension and it seems to create the surrogate key correctly for new rows and merge the data for existing rows. I am have all of the dimensions set to Type 1. For the fact table map, I could not get the dimension objects to work correctly so I am using lookups into the dimension tables to get the surrogate keys. When I tried to use the dimension objects in the lookups it keeps adding an extra column with "_1" for the dimension key. It works correctly when I do the lookup using the dimension table. It seems like everything works okay. I am just worried about the warning message and wondering why OWB forces a number datatype when a float is much smaller.
Thanks
Don

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