Hello,
What is happening here is that the size of the return results have crossed a
threshold internal to InfoPath that causes this dialog to display. I don't
recall offhand what the threshold is.

Some techniques to avoid this dialog are to restructure your query to return
smaller sets of data and then page thru it, or to set query parameters to
filter the data you query for.

For example you could have some dropdown boxes that allow the user to select
values in certain data fields and then use those values as query parameters
to only return records with those values.