How to control the number of fields in the Advanced mode in af:query

Hi,
How to control the number of fields in the Advanced mode in <af:query>?
Say i have 20 fields in my table and i created a view criteria with 2 fields. It would work perfectly in Basic mode. But in the Advanced mode all other fields selection is possible on clicking the ADD Fields button. I did not want the client to make a search with all 20 fields. Only 10 fields are to be listed in the Advanced Mode even though there are 20 fields in my table.
How do i control the list of fields in ADDFields button?
Any ideas?
KR

You can uncheck the Querable property of the attributes which you need not show up in the Advanced Mode (but they will not show up in other modes too !) or programatically set the same as mentioned here -
http://adfcodebits.blogspot.com/2010/11/bit-27-setting-view-object-attributes.htmlAlso you can hide the AddFields button as suggested here - http://www.notjustjava.com/2011/12/cool-tips-to-showhide-components-of-the-query-control-of-adf/

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