ExAliyunOts.Search.pk_sort

You're seeing just the function pk_sort, go back to ExAliyunOts.Search module for more information.

pk_sort(order)

pk_sort(order()) :: map()

Sort by the primary key(s) of row, use it in the nested :sort option of :search_query option in ExAliyunOts.search/4.

Each search request use this sort by default.