Hi,-
i hope everyone is doing great.
if i want to do the following search with PhraseWildCardQuery and
thanks to this forum for letting me know about this class (Especially to
David and Bruno)
term1 term2FirstChar*
i need to do two ways: (i found the source code at
https://fossies.org/linux/lucene/sandbox/src/java/org/apache/lucene/search/PhraseWildcardQuery.java)
/*
maxMultiTermExpansions - The maximum number of expansions across all
multi-terms and across all segments. It counts expansions for each
segments individually, that allows optimizations per segment and unused
expansions are credited to next segments. This is different from
MultiPhraseQuery and SpanMultiTermQueryWrapper which have an expansion
limit per multi-term.
segmentOptimizationEnabled - Whether to enable the segment optimization
which consists in ignoring a segment for further analysis as soon as a
term is not present inside it. This optimizes the query execution
performance but changes the scoring. The result ranking is preserved.
*/
1st way:
PhraseWildCardQuery.Builder builder = PharseWildCardQuery.Builder(field,
2 _*/<<< i dont know what number to use here for
maxMultiTermExpansions>>>/*_, true/*boolean segmentOptimizationEnabled*/)
pwcqBuilder.addTerm(field, new Term(field, "term1"));
pwcqBuilder.addTerm(field,new Term(field, "term2FirstChar"));
PhraseWildCardQuery pwcq = pwcqBuilder.build();
or
2nd way:
pwcqBuilder.addMultiTerm(MultiTermQuery object here contaning {field,
"term1"} and {field ,"term2FirstChar"});
PhraseWildCardQuery pwcq = pwcqBuilder.build();
Then this pwcq object will be fed into IndexSearcher's as the query
parameter.
Now, it looks like the first way will not consider expansions or in
other words wildcard? Am i right?
i also need to understand this maxMultiTermExpansions parameter better.
For instance if first way is used, will maxMultiTermExpansions be
meaningful?
Thanks
