In SQL, I have the query like this
SELECT * FROM table1 INNER JOIN table2 ON table1.table1To2Id = table2.table2Id INNER JOIN table3 ON table1.table1To3Id = table3.table3Id
How can I make the same query using Solr? Given that the field in SQL is the same field in Solr
Thank in advance
Advertisement
Answer
I believe you are looking for something like this:
SQL:
SELECT * FROM books WHERE id IN (SELECT bookId FROM bookauthors WHERE authorId IN (SELECT authorId FROM author WHERE author.name LIKE '%Rowling%'))
Solr (split to multiple lines for readabilty):
http://<code>hostname:8983/solr/select?q=*:*&fq= {!join+from=bookId+to=id} authorId:{!join+from=authorId+to=authorId} author.name:Rowling
The key is to pass in the next join query after :
instead of passing the value. For more information refer to this