The query expressions that would be sent to the index once the search request has been fully processed by the query pipeline.
The final basic query expression (q).
The final large query expression (lq).
The output that would be included by the Search API in the query response once the search request has been fully processed by the query pipeline.
The query response output generated by trigger rules in the query
pipeline (i.e., by execute, notify, query, and redirect rules).
Describes the plan of execution of a search request.