For what it is worth, I would be also interested in answers to
these questions. ;)
On Mon, Sep 21, 2020, 19:08 Uwe Schindler <u...@thetaphi.de> wrote:
> Hi all, hi Alan,
>
> I am currently rewriting some SpanQuery code to use IntervalQuery. Most of
> the transformations can be done quite easily and it is also better to read
> after transformation. What I am missing a bit is some document to compare
> the different query types and a guide how to convert those.
>
> I did not find a replacement for SpanFirstQuery (or at least any query
> stat takes absolute positions). I know intervals more deal with term
> intervals, but I was successful in replacing a SpanFirstQuery with this:
> IntervalsSource term = Intervals.term("foo");
> IntervalsSource filtered = new
> FilteredIntervalsSource("FIRST"+distance, term) {
> @Override
> protected boolean accept(IntervalIterator it) {
> return it.end() < distance; // or should this be <= distance???
> }
> };
> Query = new IntervalQuery(field, iv2);
>
> I am not fully sure if this works under all circumstances 😊. To me it
> looks fine and also did work with more complex intervals than "term". If
> this is ok, how about adding a "first(int n, IntervalsSource iv)" method to
> Intervals class?
>
> The second question: What's the "closest" replacement for a PhraseQuery
> with slop? Should I use maxwidth(slop + 1) or maxgaps(slop-1) or
> maxgaps(slop). I know SpanQuery slops cannot be fully replaced with
> intervals, but I don't care about those SpanQuery bugs.
>
> Uwe
>
> -----
> Uwe Schindler
> Achterdiek 19, D-28357 Bremen
> https://www.thetaphi.de
> eMail: u...@thetaphi.de
>
>
>
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