SAP ABAP Syntax for Describe part three

Addition 3

... TYPE typ COMPONENTS n

Similar to ... TYPE typ except that, with structures in typ , u or v are returned and in the number of structure components is set in n . If f is not a structure, n is set to 0.

Example

Recursive processing of the pages of an ABAP/4 data structure:

FORM TEST USING F.

  DATA: TYP(1) TYPE C, N TYPE I.

  FIELD-SYMBOLS: .

  DO.

    ASSIGN COMPONENT SY-INDEX OF STRUCTURE F TO .

    IF SY-SUBRC <> 0. EXIT. ENDIF.

    DESCRIBE FIELD  TYPE TYP COMPONENTS N.

    IF N > 0. " Equivalent is TYP = 'u' OR TYP = 'v'

      PERFORM TEST USING .

    ELSE.

      PERFORM DO_SOMETHING USING .

    ENDIF.

  ENDDO.

ENDFORM.

Addition 4

... OUTPUT-LENGTH len

Effect

Enters the output length of the field f in the variable len .

Example

 DATA: FLD(4) TYPE P,

      O_LEN TYPE P.

DESCRIBE FIELD FLD OUTPUT-LENGTH O_LEN.

Result: O_LEN contains the value 8.

Addition 5

... DECIMALS n

Effect

Enters the number of decimal places for the field f (defined in addition ... DECIMALS of the DATA statement or in the ABAP/4 Dictionary ) in the variable n .

Example

 DATA: FLD(8) TYPE P DECIMALS 2,

      DEC TYPE P.

DESCRIBE FIELD FLD DECIMALS DEC.

Resultat: DEC contains the value 2.

Addition 6

... EDIT MASK mask

Effect

If the field f has a conversion routine in the ABAP/4 Dictionary , this is placed in the field mask in the form " ==conv ". " conv " stands for the name of the conversion routine, e.g. " ==ALPHA " in the conversion routine " ALPHA ". In this form, mask can then be used in the addition USING EDIT MASK mask of the WRITE statement.

Example

Check whether there is a conversion routine for the field "customer number" in the table SBOOK :

 TABLES SBOOK.

DATA: CONV_EXIT(10).

DESCRIBE FIELD SBOOK-CUSTOMID EDIT MASK CONV_EXIT.

IF CONV_EXIT <> SPACE. ... ENDIF.

Result: CONV_EXIT contains the value " ==ALPHA ".

RELATED POST

SAP ABAP SYNTAX FOR DESCRIBE PART TWO

Labels: SYNTAX CHECK