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PARAMETERS, type_options

Short Reference

... ${ TYPE type $[DECIMALS dec$] $}
  $| ${ LIKE dobj $}
  $| ${ LIKE (name) $} ...


1. ... TYPE type $[DECIMALS dec$]

2. ... LIKE dobj

3. ... LIKE (name)


These additions define the data type of the parameter. If none of the additions is specified, the parameter has the type c. The data type can be defined using a static reference to an existing data type type, using a static reference to a data object dobj, or using a dynamic reference to a data type from the ABAP Dictionary in name.

If the addition NO-DISPLAY is not specified, the data type of a parameter must be elementary and flat, except for string, and the numeric type f is not allowed. If the addition NO-DISPLAY is specified, any data types, except reference types and enumerated types, are possible.


If there is a reference to data types from the ABAP Dictionary, the parameter adopts all screen-relevant properties defined here. Conversion routines defined in the domain may be executed during the data transport from and to the input field. The text defined in the ABAP Dictionary can be inherited as a selection text. It should be noted, however, that the input field on the selection screen is linked with a global data object of the program and does not have a real reference to the ABAP Dictionary, as is the case for dynpro fields created in the Screen Painter with reference to the dictionary. This has a particular effect on automatic support for input help (F4) and value checking. In comparison to general dynpros, input help functionality is limited here in such a way that dependencies between fields and previously entered data are not respected. A value check is not performed automatically but can be executed using the addition VALUE CHECK.

Alternative 1

... TYPE type $[DECIMALS dec$]


This addition gives the parameter the data type type. type can be specified as:

  • The built-in ABAP types, except for b, s, f, and xstring.
  • A non-generic data type from the ABAP Dictionary, a non-generic public data type of a global class, or a data type from the same program, already defined using TYPES, and which is elementary and not of the type f or xstring (unless NO-DISPLAY is used) and which is not an enumerated type.

If the built-in ABAP type p is specified, DECIMALS can be used to define the number of digits after the decimal point dec. If DECIMALS is not specified, the number of decimal places is 0. If DECIMALS is specified, the same applies as to the statement TYPES.

If type is a type from the ABAP Dictionary that has the type CHAR, length 1, and the fixed values "X" and " " in the domain, the input field on the selection screen is displayed automatically as if the addition AS CHECKBOX were specified.


Enumerated types cannot be specified, regardless of the base type.


Declaration of a parameter with reference to the component carrid of the database table spfli. On the selection screen, a three-character input field with a callable field help and input help is created.

Alternative 2

... LIKE dobj


Using this addition, the parameter applies all the properties of a data object dobj already declared, in particular a possible reference to the ABAP Dictionary. The same applies to dobj as to TYPES ... LIKE, except that the specified data object can be elementary and flat, except for string, it cannot have the type f (unless NO-DISPLAY is used) and cannot be an enumerated type.


  • LIKE can be used to reference the public attributes of global classes.

Alternative 3

... LIKE (name)


This addition creates the data object para with the data type c and the length 132. The input field is displayed on the selection screen, but with a length, field help, and input help appropriate for the data type specified in name.

name expects a flat character-like data object containing the name of a component in a flat structure from the ABAP Dictionary in uppercase letters when the selection screen is called. The following can be specified for name:

  • Constant
If the data object name is specified as a constant, it can be evaluated statically, and the specified component is identified as the used object.
  • Variable
If the data object name is specified as a variable, it is specified only dynamically, and the content is not evaluated statically.

A text field literal can be specified for name, but its content is not evaluated. If the text pool currently loaded does not contain a selection text for the parameter, the output field displays the corresponding field label from the ABAP Dictionary. When the data is transported from the input field to the data object para, the content is converted in such a way as if it were assigned by the respective ABAP data type (no formatting characters, decimal separation character is period symbol, data format is "yyyymmdd", and so on).

If the content of name is not a component structure from the ABAP Dictionary or a literal is specified for name, the input field is displayed according to the actual type of the parameter. If no selection text is created for the parameter in the currently loaded text pool, the output field contains the text "Dynamic Parameter".


The field name of the program in which the selection screen is defined is used. If the selection screen is defined in a logical database, the field name of the database program is used, even if the selection screen from the assigned executable program is displayed.


Dynamic formatting of the input field of the parameter p_dyn. On the selection screen, a three-character input field with the input help for the column carrid in the database table spfli is displayed. If the parameter does not have a selection text, the text "Airline Carrier" is displayed in the output field.

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