using OR and NOT in solr query

I don't know why that doesn't work, but this one is logically equivalent and it does work:

-(myField:superneat AND -myOtherField:somethingElse)

Maybe it has something to do with defining the same field twice in the query...

Try asking in the solr-user group, then post back here the final answer!

Solr currently checks for a "pure negative" query and inserts *:* (which matches all documents) so that it works correctly.

-foo is transformed by solr into (*:* -foo)

The big caveat is that Solr only checks to see if the top level query is a pure negative query! So this means that a query like bar OR (-foo) is not changed since the pure negative query is in a sub-clause of the top level query. You need to transform this query yourself into bar OR (*:* -foo)

You may check the solr query explanation to verify the query transformation:

?q=-title:foo&debug=query

is transformed to

(+(-title:foo +MatchAllDocsQuery(*:*))

Instead of "NOT [condition]" use "(*:* NOT [condition])"