url field search no results

(from github.com/freestyle68)
Hi,
according to http://fess.codelibs.org/11.4/user/search-field.html
the search

url:"*youtube*"

on

http://search.n2sm.co.jp/search/?q=url%3A"youtube%22&num=20&sort=

should have some results, as seen for example with this search:

http://search.n2sm.co.jp/search/?q=demo&ex_q=label%3Areddit&sdh=&

There is something to enable on fess to make this field searchable?

Thank you

(from github.com/marevol)
For searching with a partial matching in url, inurl is supported.

inurl:youtube

(from github.com/freestyle68)
Yes, I tested it and produces reliable results, not to forget the query is case sensitive.

The query url:path instead not give predictable results, for example it happens the query

url:*select1*

give me zero results and

url:*elect1*

instead give me some results where the path contain select1 (but not all).

But not so much important at this point with the inurl operator.

Many thanks for the help