When a table type is defined, the key to be used for the table type must be specified.

The following keys may be defined:

• Default key: The key contains all the character-like fields of the table row. If the table row of a table type does not contain character-like fields, you cannot select Default key for the table type.
• Table row is key: The contains the entire table row (all fields) of the table type.
• Key not specified: The key is not specified. A generic table type is defined that can be used for example to define the type of generic table parameters of function modules and forms, but not to define data objects or types.