ABAP/4 ОКМ ДМ экономическая информатика 4GL Теория и практика обработки информации

Компьютерный язык ABAP/4 - ключевые слова

INITIALIZATION

Basic form

INITIALIZATION.

Effect

Processing event.

Executed before the selection screen is displayed.

The parameters (PARAMETERS ) and selection criteria (SELECT-OPTIONS ) defined in the program already contain default values (if specified). You can assign different values here and also change the database-specific selections.

In contrast to R/2 , this event is also executed during background processing.

Example

Define the last day of the previous month as the key date:


PARAMETERS QUAL_DAY TYPE D DEFAULT SY-DATUM.
INITIALIZATION.
  QUAL_DAY+6(2) = '01'.
  QUAL_DAY      = QUAL_DAY - 1.

Here, the default value of QUAL_DAY is the current date, e.g. 05.04.88 ( QUAL_DAY = '19880405'). Two subseqent statements set the date first to the beginning of the month, e.g. 01.04.88 ( QUAL_DAY = '19880401') and then, by subtracting one day, to the last day of the previous month, e.g. 31.03.88 ( QUAL_DAY = '19880331').

Note

In more precise terms, INITIALIZATION is executed in the following steps:
Specify default values for the selections. Execute the event INITIALIZATION. Import variant (if used to start the report). On SUBMIT , the values specified for each WHERE clause are also transferred, if necessary. Execute the event AT SELECTION-SCREEN OUTPUT , if it occurs in the report (unlike INITIALIZATION , this event is always executed for PBO of a selection screen). Display selection screen. Transport the screen fields containing user input to the report fields. Continue with START-OF-SELECTION .

Note

Since INITIALIZATION is only executed once when you start the report, it is not suitable for screen modifications such as suppressing individual parameters (LOOP AT SCREEN , MODIFY SCREEN ) because these changes would disappear again when the user pressed ENTER. The correct event for screen modifications is AT SELECTION-SCREEN OUTPUT .

Related AT SELECTION-SCREEN , START-OF-SELECTION

Index
© SAP AG 1996

ABAP/4 ОКМ ДМ экономическая информатика 4GL Теория и практика обработки информации

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