Hi everyone,
I am building an autocomplete index. The index contains both the names and a
small set of fixed types.
The intention is that type matches will always come first, followed by name
matches.
I am using a PrefixQuery to do substring matching. Confusingly, I am finding
that very short prefix
matches sometimes will return no results when combined with an additional
filter.
For example, I have a document "body:german type:TYPE". The query
"+(type:TYPE) +body:ge*" matches this document.
The query "+(type:TYPE) +body:g*" does not. Double confusingly, it works fine
in Luke -- just not when I build the query by hand.
Here is how I create the document:
Document doc = new Document();
doc.add(new Field("body", "German", TextField.TYPE_STORED));
doc.add(new Field("type", "TYPE", StringField.TYPE_STORED));
Here is how I build the query:
Query allowedTypes = new BooleanQuery();
allowedTypes.add(new TermQuery(new Term("type", "TYPE")), Occur.SHOULD);
Query prefixQuery = new PrefixQuery(new Term("body", "ge"));
prefixQuery.setRewriteMethod(new
MultiTermQuery.TopTermsScoringBooleanQueryRewrite(10000));
Query mainQuery = new BooleanQuery();
mainQuery.add(allowedTypes, Occur.MUST);
mainQuery.add(prefixQuery, Occur.MUST);
Am I missing something obvious?
Thanks,
Steven Schlansker
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