Hello,
We use Solr to search over a filesystem, so there are a lot of files and
folders indexed, name and path of each file are stored in different fields. The
task is to find folders by name AND containing at least one file of specific
type somewhere inside. For example, we search by phrase "test" and for JPG
files and have two folders:
1) "test1" - empty folder
2) "test2" - contains 1 file "abcd.jpg" inside.
Search result must only contain folder "test2", because "test1" does not
correspond to second criteria.
SQL equivalent of such search query looks like:
SELECT * FROM indexed_files t1 WHERE t1.name LIKE '%test%' AND (SELECT COUNT(*)
FROM indexed_files t2 WHERE t2.path LIKE CONCAT(t1.path, '%') AND t2.name LIKE
'%jpg') > 0;
The question is: is it possible to do such search in Solr by single query?
Single query is important because we need to use Solr's paging ("start" and
"rows" parameters), so we should avoid filtering of wrong results in our code.
I've read Solr wiki about nested queries but haven't found a way to do it. BTW,
does Solr provide equivalent of "SELECT COUNT(*)" statement to access count of
found records directly in Solr query? Or such complex query is completely
impossible?
--
Best regards,
Asv mailto:asvs...@gmail.com
