You can specify the number of query results returned by Apache Solr by using the “rows” parameter. Here’s a brief overview of how to use the “rows” parameter:
1. The “rows” parameter: The “rows” parameter is used to specify the maximum number of search results to return. By default, Solr returns 10 results per query. To change the number of results returned, you can specify a different value for the “rows” parameter.
2. Example: To get the first 20 results of a query, you would use the following URL:
http://localhost:8983/solr/yourcore/select?q=*:*&rows=20
This URL specifies that the search query should return all documents (“*:*”) and that the maximum number of results to return is 20 (“rows=20”).
3. Pagination: If you want to implement pagination in Solr, you can use the “start” parameter in conjunction with the “rows” parameter. The “start” parameter specifies the offset of the first result to return. For example, to get the second page of search results (with 20 results per page), you would use the following URL:
http://localhost:8983/solr/yourcore/select?q=*:*&start=20&rows=20
This URL specifies that the search query should return all documents (“*:*”), but start from the 21st result (“start=20”) and return a maximum of 20 results (“rows=20”).
By using the “rows” parameter, you can customize the number of search results returned by Solr to suit your needs. The Solr documentation provides detailed information on how to use pagination and other query parameters to fine-tune your search queries.