Constrain Found Set Searches ALL Records?!!

[alycara]

I do a search on an indexed field, then I want to constrain that find by searching on a unindexed field. Filemaker insists on search all the records! This is a huge time waster in my 208k-record file. Is there any way around that? Why did Filemaker do this?

[The Shadow]

FYI, this does not appear to be the case with FM7. Using constrain on an unindexed field appears to be efficient.