Modules for Calling the InfoSet Query 
To call the InfoSet Query, the SAP System provides you with four reports and four function modules of the same name, which implement the InfoSet Query call and determine access rights and reporting type for the InfoSet Query.
The following reports/function modules are available:
Parameter
A user group from the global area has to be assigned to the role. If you specify an InfoSet, then it has to be assigned to the user group. If you specify a query, then it has to be assigned to the user group.
Parameter
A user group from either the global or standard area has to be assigned to the role. If you specify an InfoSet, then it has to be assigned to the user group. If you specify a query, then it has to be assigned to the user group.
Parameters (all optional)
The user group has to come from the global area. If you specify more than one parameter, then they must match, meaning that the InfoSet has to be assigned to the user group and the query must be based on the specified InfoSet. Input help can support you with the entries.
Parameters (all optional)
First, decide which query area you want to work in with the InfoSet Query (standard setting: Standard area). To enable you to work in the global area, select the Global Area indicator. Enter the remaining parameters.
If you specify more than one parameter, then they must match, meaning that the InfoSet has to be assigned to the user group and the query must be based on the specified InfoSet. Input help can support you with the entries.

Calling up the InfoSet Query has been set up in Human Resources (HR), so that the InfoSet Query has default values in the specified query area and user group parameters, and only ad-hoc reporting can take place. This means, that a user, who starts InfoSet Query using HR’s information systems, either goes straight to the initial screen of the InfoSet Query, where the assigned InfoSet is displayed, or can choose between several assigned InfoSets. In this type of call in HR, the InfoSet Query is called Ad-hoc Query.
The optional parameters are used to prepare an InfoSet or a query when calling the InfoSet Query. These "templates" can be processed directly. If no parameters are used for the call, then the system tries to come up with a suitable proposal for starting the InfoSet Query from those objects (role, user group, InfoSet) last used by the user.
The reports call the function modules with the same name directly. When calling the InfoSet Query, it does not matter if the reports or the function modules are used. To implement the call using menu entries, however, you have to use the reports.