query for document that two fields are equal?

Question

There are two text fields in solr, both of them are white space tokenized and have lower case filter. below is the schema:

Answer 1

Method 1 - frange parser

As mentioned by @dduo you can use the https://lucene.apache.org/solr/guide/6_6/other-parsers.html#OtherParsers-FunctionRangeQueryParser. Here's the way Trey Grainger (one of the authors of Solr in Action) said to do it:

q=*:*&fq={!frange l=1 u=1 v=$equals}&equals=if(eq(field1,field2),1,0)

I tested this and it worked for a collection with 140 million documents in about 10 second query with 600,000 in the result set.

So this works, but it's kinda slow.

Method 2 - Use a streaming expression

The following expression seems to work to do what we are looking to do here:

having(search(your_collection_name, q="*:*", sort="id asc"), eq(field1, field2))

This seems to be much more performant, as it returns instant results. So if you can use streaming expressions, this is probably a faster way to get what you are looking for.