Hi,
I'm using lucene-5.2.0 and in query interface I wish to compose a query
like
"a=x and (b=y or d=z)"
Which can be described as If any document has value "x" for field "a" and
field "b" has value "y" or field "d" has value "z" then that document
should be chosen. There are three fields in my document i.e. a, b and c.
I was thinking of using BooleanQuery object to implement such query but it
seems difficult to implement the same.
If I write the above clause in terms of boolean query then this is the best
I can think of:
((BooleanQuery)query).add(new RegexpQuery(new Term("a", "x")),
BooleanClause.Occur.MUST);
((BooleanQuery)query).add(new RegexpQuery(new Term("b", "y")),
BooleanClause.Occur.SHOULD);
((BooleanQuery)query).add(new RegexpQuery(new Term("c", "z")),
BooleanClause.Occur.SHOULD);
But in the above case a document will be selected even if it does not have
value of field "b" as "y" or value of field "c" as "z" but has value of
field "a" as "x". The OR condition might be ignored.
Correct me If my understanding is wrong here.
Can someone please suggest some better solution to compose such query?
Regards,
Sandeep
