Programming GetList() BAPIs 
Use
With the BAPI GetList() you can select a range of object key values, for example, company codes and material numbers. The key values returned by this BAPI can be passed on to another BAPI for further processing, for example, the BAPI GetDetail().
The BAPIs GetList() is a class method (instance-independent).
Features
Provide all the relevant fields in the interface of the GetList() BAPI. How complex and extensive you structure the interface, depends on the requirements the BAPI is to fulfill.
Import Parameters
You should keep the following points in mind when defining the import parameters:
- The interface of a GetList() BAPI must provide selection parameters, in which the required selection criteria can be passed on by the calling program. The structure of selection parameters is described in the section
Selection Parameters.
- You must also create the parameter MaxRows that enables you to limit the number of entries selected. This parameter prevents too large a value set from being selected, if the selection parameter specification is not very precise.
Use the data element BAPIMAXROW as the reference type for the MaxRows parameter.
- If customers are to be enabled to enhance the import parameters of the BAPI without modifications being necessary, you must create the parameter ExtensionIn.
For information about extension parameters and recommendations on how the customer enhancement concept should be implemented in a GetList() BAPI, see
Customer Enhancements and Modification to BAPIs.
Since the GetList() BAPI is a class method, you cannot create a parameter in the function module that has the same name as a key field of the corresponding business object type.
Export Parameters
You should keep the following points in mind when defining the export parameters:
- The values selected by the BAPI GetList() are returned to the calling program in a table, together with other useful information, for example, short texts.
- If customers are to be allowed to extend the export parameters of the BAPI without modifications being necessary, you must create the parameter ExtensionOut.
For information about extension parameters and recommendations on how the customer enhancement concept should be implemented in a GetList() BAPI, see
Customer Enhancements and Modification to BAPIs.
- To report messages from the method call back to the calling program, you should create the export parameter Return . It is of particular importance when errors occur that messages describing the errors in detail are returned. You should, therefore, use all of the fields of the structure BAPIRET2. You should, in particular, fill the fields Parameter, Row and Field.
For more information about this parameter, see
Return Parameters (Error Handling).
See also:
Example of a GetList() BAPI