Guys, thanks a lot for replies, I'd like to experiment a little bit before accepting. But I'd like to avoid to relay on exact fieldset in search 1 and 2, I'd like to have some unified approach. Means, I'd like to avoid using f3 explicitly in search. Let's imagine that fieldset for search 1 is defined in some variable, I don't know exact fieldset, it's configurable, I don't want to parse it. So the spl should be independent from what is in configuration. Also I have no _raw field, both search are came from lookup.
Now all I can imagine is to search index1 twice, something like this:
index=index1 | search NOT [index=index2 | search [index=index1]]
... View more