How to search across all the fields?

lucene.net lucene
Adam Lee picture Adam Lee · Mar 2, 2013 · Viewed 9.3k times · Source

In Lucene, we can use TermQuery to search a text with a field. I am wondering how to search a keyword across a bunch of fields or all the searchable fields?

Answer

javanna picture javanna · Mar 2, 2013

Another approach, which doesn't require to index anything more than what you already have, nor to combine different queries, is using the MultiFieldQueryParser.

You can provide a list of fields where you want to search on and your query, that's all.

MultiFieldQueryParser queryParser = new MultiFieldQueryParser(
                Version.LUCENE_41, 
                new String[]{"title", "content", "description"},
                new StandardAnalyzer(Version.LUCENE_41));

Query query = queryParser.parse("here goes your query");

This is how I would do it with the original lucene library written in Java. I'm not sure whether the MultiFieldQueryParser is available in lucene.net too.

Related questions

How to specify two Fields in Lucene QueryParser?

I read How to incorporate multiple fields in QueryParser? but i didn't get it. At the moment i have a very strange construction like: parser = New QueryParser("bodytext", analyzer) parser2 = New QueryParser("title", analyzer) query = parser.Parse(strSuchbegriff) query2 = parser.…

Read More
solr search for documents where a field doesn't exist

How do I search for those document in a SOLR index which do not contain a specified field?

Read More
Is it possible to iterate through documents stored in Lucene Index?

I have some documents stored in a Lucene index with a docId field. I want to get all docIds stored in the index. There is also a problem. Number of documents is about 300 000 so I would prefer to get this …

Read More