Multiple Field Query handling in Lucene

Question

I have written an index searcher in Lucene that will search multiple fields in the indexed database.

Actually it takes query as two strings one is say title

Answer 1

We use MultiFieldQueryParser only when we want to search the same keyword(s) in multiple fields.

To handle your use case, it is simpler that you already have references to city-keyword and title-keyword separately. Try using following code.

StandardAnalyzer analyzer = new StandardAnalyzer(Version.LUCENE_CURRENT);
// city query
QueryParser cityQP = new QueryParser(Version.LUCENE_CURRENT, "city", analyzer);
Query cityQuery = cityQP.parse(myCity);

// title query
QueryParser titleQP = new QueryParser(Version.LUCENE_CURRENT, "title", analyzer);
Query titleQuery = titleQP.parse(myQuery);

// final query
BooleanQuery finalQuery = new BooleanQuery();
finalQuery.add(cityQuery, Occur.MUST); // MUST implies that the keyword must occur.
finalQuery.add(titleQuery, Occur.MUST); // Using all "MUST" occurs is equivalent to "AND" operator.