The Solr Query Stage was renamed for Fusion 3.0; it was called the Query Solr stage in previous versions.
The Solr query stage transforms the Fusion query pipeline
object into a Solr query and sends it to Solr.
When entering configuration values in the UI, use unescaped characters, such as \t for the tab character. When entering configuration values in the API, use escaped characters, such as \\t for the tab character.