QueryBuilder count without column name

[teremy]

Hi. I am building a query using QueryBuilder and I am selecting from a table with a composite key (and do multiple joins). How do I get the resulting number of rows of the query? In SQL it would be something like "SELECT count(*)..." but it seems I have to specify a column, which I can't since I only have a composite key (two columns that uniquely identify a row).
Iterating through all the rows to manually count the entries is not really an option, since the reason I need the count is because I want to use pagination (doctrine's pagination (https://www.doctrine-project.org/projects/doctrine-orm/en/2.11/tutorials/pagination.html) doesn't seem to work in my case, because the count(..)-function will give an error).
I just want to make sure that there is no doctrine-way to achieve what I want, before going with a native sql statement (which of course I try to avoid).