[Xapian-discuss] How to choose the proximity between search words

Hey, Nat. For OP_NEAR (and OP_PHRASE), the "parameter" to the Xapian::Query constructor gives a "window" which will do what you want. The getting started guide has a little on these <http://getting-started-with-xapian.readthedocs.org/en/latest/concepts/search/queries.html#near-and-phrase>, although probably not nearly enough. I don't think it has practical examples of using them, but in the meantime the API docs have some details:

<http://xapian.org/docs/apidoc/html/classXapian_1_1Query.html#7e7b6b8ad0c915c2364578dfaaf6100b7a78c8353d5d06d3a38c1899ae762b21>

Hope this helps!

J

Hi!

Thanks for your response, I'm not sure I totally understand how it works, but
this surely helps.
I have something where to start ;)

Nat

Hi!

So thanks to James and OP_NEAR operator, I can search for terms within 10 words
of each other. What I'd like is to choose the number of words : 10, 20, 50... Is
that possible?

Thanks in advance,

Nat

Nat ? this is what the Query parameter is used for with OP_NEAR. It's called the "window" that the near operator works over.

J

Oh! Ok, I really didn't understand that... Thanks a lot!

Nat

Hi! And happy new year :)

With the end of the year, I haven't had much time to work on my search
application. I just tried to use Xapian::Query constructor to specify my window
size, but I can't find the right syntax, nothing worked :(

This is my PHP code:


$queryOP = XapianQuery::OP_NEAR;
$proximity = 30;

$queryparser->set_default_op(XapianQuery::OP_NEAR);
$query = $queryparser->parse_query($searchexp,XapianQueryParser::FLAG_DEFAULT);


where searchexp is, for example, "vierge marie".

I've got my query, but I don't know how I can use Xapian::Query constructor or
any function of this class to specify my $proximity.

I have to admit I'm a little lost!

Thanks in advance

Nat

You can't currently set the window size used by QueryParser if you set
default_op to OP_NEAR.
If you build the phrase Query object by hand, you would do it like so:

$query = new XapianQuery(XapianQuery::OP_NEAR, array('hello', 'world'), 30);

Cheers,
Olly

Olly Betts <olly <at> survex.com> writes:
OK! Thank you, I understand now :)