I hope you're all following this old thread, because I've just run into something I don't quite know what to do about with the SpansExtractor code that I shamelessly stole.
Let's say my text is "a b c d e f g h" and my query is "a AND z". The implementation I stole for SpansExtractor (mentioned several times in this thread) returns a span for "a" which doesn't preserve the sense of the query. The root of the problem is that when it gets down to assembling the getSpansFromTermQuery, the sense of "AND" is lost and I get span for the "a" in the query. The rest of the kinds of spans don't seem to have the same issue. OR should return the "a" in the example above. Any phrase queries that come through work fine. In fact, our application requires that we have an implied proximity, mostly anyway, so I haven't had to deal with this until now..... One way, it seems to me, to handle this would be to transform the query above into a span query with a limit of 10,000, where 10,000 is a magic number that I'm confident is OK in my application because of the PositionIncrementGaps I set up during indexing. Is there a more elegant way of doing this? Or am I missing the boat entirely? Or did I mess up when I stole the code? Or, and this would be the easiest for me at least, has this work already been done and all I really need to do is get a different implementation of SpansExtractor <G>? Thanks Erick On 2/2/07, Mark Miller <[EMAIL PROTECTED]> wrote:
mark harwood wrote: > Hi Mark, > Have you looked at the returned spans from any other potential problem scenarios (other than the 3 word one you suggest) e.g. complex nested "SpanOr" or "SpanNot" logic? > Nothing super intense, but I haved look at some semi complex nesting and it all looks great if you use the full span highlighting...highlighting the first and last word of the span only works great if your limited to word to word proximity searching (like in my parser <G> works great for my sentence and paragraph proximity searching, though i had to add the option of hiding my index marker tokens from the output) Perhaps you know of something that I haven't run into that may not highlight correctly ? > Can you attach your code to a new Jira entry so I can have a play? > > I certainly will. - Mark --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
