On 8/4/2011 9:06 PM, Trejkaz wrote:...
For AND (and for any "default boolean" queries which aren't equivalent
to OR) queries, I have problems. For instance, you can't do this:
within(5, 'my', and('cat', 'dog')) -> and( within(5, 'my', 'cat'),
within(5, 'my', 'dog') )
The problem is that this changes the semantics - the original query
implies that the same "my" span is used when matching the other two,
whereas the rewritten form allows it to be any "my" in the document.
This problem doesn't exist with OR queries because it doesn't have to
match both terms.
Q2: Is there some way to "pin this down" such that the "my" matched by
each is the same position?
Can you do something approximately equivalent like:
within(5, 'my', and('cat', 'dog')) ->
within(5, 'my', within(5, 'cat', 'dog') )
Might not be exactly the same in terms of distances (eg "cat x x x my x
x x dog") might match the first and not the second... and "my x x x cat
x x x dog" vice versa, but given that these are "sloppy" queries - maybe
that's good enough :) ?
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