distinct email sets through tFlowToIterate without multiple DB query

[quad4x]

I'm currently trying to grab data with associated email addresses and email each individual with data from that query.  Since I do not want to email the same person multiple times,I first query to get all the unique emails.

With the set of unique emails I then run through

tUniqRow->tFlowToIterate->DB input->tFilterRow->tJavaFlex->tSendMail

This works and I get the data for each unique email, but it also has the downside of having to query on the DB input each time for each email.

Is there a way to iterate through a set of emails and only do the query once?