Why aerospike scan queries have been changed to be now called Primary Index queries?

In documentation it is mentioned that “SHOW SCANS” aql query gives “List running primary index (PI) queries (formerly known as scans):”

If I do not specify a where clause in my query , then It is not using a primary key index but instead scanning the whole set. Then why “show scans” documentation mentions that it returns PI queries ?

If you specify a WHERE clause, then it uses the corresponding SECONDARY index for the query, not the primary index. A scan always uses the primary index, and now is renamed as a Primary Index (PI) query. The new name should make it clear that the primary index is used, and also a scan is a type of a query, which is a neutral term used in databases for data retrieval.