I'm using the union feature in multi_search so that we can effectively do an "OR" search with multiple keywords/ phrases in one go. That works well - but the issue I'm having is that it duplicates a lot of stuff. Lets say I have 2 records:

ID: 1
title: test computer man

ID: 2
title computer geek

When I do a mutli_search for "geek" and "computer" and "man" (so 3 searches), I get 4 results - 2 for "computer" and 1 for "geek". and 1 for "man". So what I'm proposing is the ability to de-dupe them. Currently, I'm doing it in my perl code with :

        foreach (@{$results->{hits}}) {
            next if $seen_links->{$_->{document}->{id}};

            $seen_links->{$_->{document}->{id}} = 1;

            push @link_ids, $_->{document}->{id};

        }

But that obviously doesn't work super well - as it messes up the "per page" limit due to removing some of the records

Hopefully that makes sense!