How would one write a query which should perform set union on the
search terms (term1 OR term2 OR term3), and yet also perform phrase
matching if both terms are found? I tried a few variants of the
following, but in every case I am getting set intersection on the
search terms:
select?q={!q.op=OR}text:"term1 term2"~100000
Thus, if term1 matches 10 documents and term2 matches 20 documents,
then SET UNION would include all of the documents that have either
term1 and/or term2. That means that between 20-30 results should be
returned. Conversely, SET INTERSECTION would return only results with
_both_ term1 _and_ term2, which could be between 0-10 documents.
Note that in the application, users will be searching for any
arbitrary number of terms, in fact they will be entering phrases. I
can limit these phrases to 140 characters if needed.
Thank you in advance!
--
Dotan Cohen
http://gibberish.co.il
http://what-is-what.com
