search over fields.inc fields conceptual error

when selecting in the search dialog for a field, it should not get included in the DB search. Now it is looking for rows that have that field set to which is not what everybody would expect intuitively. however, it you think, that is the right thing to do, then there should at least be the possibility to select and the search function should therefore find listings with kinds of entries in that field.

the search how it is now is not very useful then, since I wanna be able to leave the location blank or search for "music events" ins "all" towns of "germany" or whatever. I hope I have outlined properly, what my concern is.