I knew about the + and other signs and their connections to MUST and other
operators. What I did not understand was why it was not adding parentheses
around the expression. In your first replay you mentioned that - 'roughly,
a builder for each query enclosed in "parenthesis"' - that was the key
point I was missing.
On Wed, Jan 22, 2020 at 2:40 PM Arnold Bronley <arnoldbron...@gmail.com>
wrote:
> Thanks, Edaward. This was the exact answer I was looking for :)
>
> On Wed, Jan 22, 2020 at 1:08 PM Edward Ribeiro <edward.ribe...@gmail.com>
> wrote:
>
>> If you are using Lucene's BooleanQueryBuilder then you need to do nesting
>> of your queries (roughly, a builder for each query enclosed in
>> "parenthesis").
>>
>> A query like (text:child AND text:toys) OR age:12 would be:
>>
>> Query query1 = new TermQuery(new Term("text", "toys"));
>> Query query2 = new TermQuery(new Term("text", "children"));
>> Query query3 = new TermQuery(new Term("age", "12"));
>>
>> BooleanQuery.Builder andBuilder = new BooleanQuery.Builder();
>> andBuilder.add(query1, BooleanClause.Occur.MUST);
>> andBuilder.add(query2, BooleanClause.Occur.MUST);
>>
>> BooleanQuery.Builder builder = new BooleanQuery.Builder();
>> builder.add(andBuilder.build(), BooleanClause.Occur.SHOULD);
>> builder.add(query3, BooleanClause.Occur.SHOULD);
>>
>> BooleanQuery booleanQuery = builder.build();
>>
>> This booleanQuery.toString() will be:
>>
>> (+text:toys +text:children) age:12
>>
>> That is the parsing of "(text:child AND text:toys) OR age:12"
>>
>>
>> Edward
>>
>> On Tue, Jan 21, 2020 at 5:24 PM Arnold Bronley <arnoldbron...@gmail.com>
>> wrote:
>> >
>> > Hi,
>> >
>> > BooleanQueryBuilder is not adding parenthesis around the query. It
>> > only adds + sign at the start of the query but not the parentheses
>> around
>> > the query. Why is that? How should I add it?
>> >
>> > booleanQueryBuilder.add(query, BooleanClause.Occur.MUST)
>>
>
