SAP PARAMETERS ABAP Statements Get Example source ABAP code based on a different SAP tableABAP Statement
ID PARAMETERS
• PARAMETERS
ABAP Statement • LENGTH PARAMETERS
PARAMETERS Short Reference ABAP_SYNTAX PARAMETERS ${para$[(len)$]$}$|${para $[LENGTH len$]$} $[type_options$] $[screen_options$] $[value_options$] $[ldb_options$]. What does it do? selection parameter para of length len. Selection parameters are components of a selection screen that are assigned a global elementary data object in the ABAP program and an input field on the selection screen. para can contain a maximum of eight characters. This statement is allowed in the global declaration part of executable programs, function pools, and module pools. In function pools and module pools, the statement is only allowed within the definition of a standalone selection screen. In executable programs, the statement is otherwise automatically assigned to the standard selection screen. len can only be specified if the data type specified in type_options has a generic length (c, n, p, and x). The length len must be specified directly as a number or as a numeric constant within the length range defined for the respective type. If len is not specified, the length is set to 1 for a generic data type, otherwise it is set to the length of the data type. PARAMETERS has the following effect: The statement declares a global variable (para) of the specified length in the program. The type of the data object is specified in type_options. An identically named input field with a suitable external data type is created in a new line at position 35 on the current selection screen. The length of the input field is determined by the length of the selection parameter. The maximum length of the input field is 255. The maximum visible length of the input field is between 39 and 45, depending on the nesting depth in framed blocks. If the length len is greater than the maximum visible length, the content is displayed as movable. An automatically generated output field is displayed in the first available position to the left of the input field as a description with a length between 23 and 30, depending on the nesting depth in framed blocks. The output field contains either the name of the selection parameter para or the selection text to which the selection parameter is assigned in the text elements of the program. If the user requests a field help or input help in the output field by pressing F1 or F4, the same output appears as when the input field itself is selected. The properties of the elements on the selection screen can be modified in screen_options and with the statement SELECTION-SCREEN. Before the selection screen is sent, the content of the para data object is transported to the input field on the selection screen and a conversion routine may be executed. If the length of the selection parameter is greater than 255, the content is truncated from the right. Settings can be configured for the content of the input field in value_options. After a user action on the selection screen, the content of the input field is transported to the data object and the content of character-like fields is converted to uppercase by default. A conversion routine may then be executed. Various selection screen events are raised after the transport. If selection parameters are defined in the selection include of a logical database, further ldb_options additions are necessary or possible. Latest notes: If a selection parameter is given data using SUBMIT when an executable program is called, a conversion routine may also be called, and the content truncated on the right at position 255. The conversion routine is skipped and the content not truncated only if the selection parameter is declared with the addition NO-DISPLAY. For reasons of readability, it is best to specify a length for the generic types and always use the addition LENGTH instead of parentheses. The name of a selection parameter must not be one of the keywords MODULE, SELECT, or VALUES of the dynpro flow logic. If the selection parameter is a decimal floating point number that does not refer to a data type in the ABAP Dictionary, the output style scaling retained is set for the input field on the selection screen, which means that trailing zeros are retained after the decimal point. If there is a reference to a data type in the ABAP Dictionary, the output style defined there applies. If the type of the selection parameter is a packed number type or a decimal floating point number type defined in the ABAP Dictionary, the property sign must be set for the type property, so that negative numbers can be displayed on the selection screen. This setting is only possible for DDIC domains and not for specifying a built-in type directly for DDIC data elements or structure components. If a negative number is entered on the selection screen and this property is not set, it is rejected with an error message. If the selection parameter contains a negative number when the selection screen is called, an uncatchable exception occurs. If the selection parameter type is a decimal floating point number type defined in the ABAP Dictionary for which the output style currency amount is specified, only numbers with the corresponding amount of decimal places can be entered on the selection screen. If the associated ABAP data object is a number with more decimal places when the selection screen is called, an uncatchable exception is raised. If the output style is extended currency amount, additional decimal places can be displayed. To avoid conflicts with internal names, do not name a selection parameter o. The selection screen events are not raised properly for that name. ABAP_CAUTION When evaluating input values from selection screens the common rules for dynpros and comparisons must be considered. This involves the handling of lower case letters by dynpros and the comparison rules for character-like data. For some examples, see TITLE . Return to menu
