ABAP Keyword Documentation →  ABAP Glossary → 

database procedure interface

Global non-modifiable interface from the Class Library that is generated for every database procedure proxy. For each interface parameter of a database procedure, a database procedure interface contains the declaration of an ABAP data type, as defined in the mapping of the database procedure proxy. Programs that use CALL DATABASE PROCEDURE to call a database procedure can refer to the data types of the database procedure interface when declaring the required actual parameters.