ABAP Select data from SAP table ISDEMANDDRIVENPRODUCTTP2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ISDEMANDDRIVENPRODUCTTP2 table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to ISDEMANDDRIVENPRODUCTTP2. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the ISDEMANDDRIVENPRODUCTTP2 table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_ISDEMANDDRIVENPRODUCTTP2 TYPE STANDARD TABLE OF ISDEMANDDRIVENPRODUCTTP2,
      WA_ISDEMANDDRIVENPRODUCTTP2 TYPE ISDEMANDDRIVENPRODUCTTP2,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <ISDEMANDDRIVENPRODUCTTP2> TYPE ISDEMANDDRIVENPRODUCTTP2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ISDEMANDDRIVENPRODUCTTP2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ISDEMANDDRIVENPRODUCTTP2
  INTO TABLE IT_ISDEMANDDRIVENPRODUCTTP2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISDEMANDDRIVENPRODUCTTP2
*  INTO TABLE @DATA(IT_ISDEMANDDRIVENPRODUCTTP22).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_ISDEMANDDRIVENPRODUCTTP2 INDEX 1 INTO DATA(WA_ISDEMANDDRIVENPRODUCTTP22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ISDEMANDDRIVENPRODUCTTP2 ASSIGNING <ISDEMANDDRIVENPRODUCTTP2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISDEMANDDRIVENPRODUCTTP2>-KEY = 1.
<ISDEMANDDRIVENPRODUCTTP2>-PARENT_KEY = 1.
<ISDEMANDDRIVENPRODUCTTP2>-ROOT_KEY = 1.
<ISDEMANDDRIVENPRODUCTTP2>-MATERIAL = 1.
<ISDEMANDDRIVENPRODUCTTP2>-PLANT = 1.

ENDLOOP.

LOOP AT IT_ISDEMANDDRIVENPRODUCTTP2 INTO WA_ISDEMANDDRIVENPRODUCTTP2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISDEMANDDRIVENPRODUCTTP2-MRPAREA, sy-vline,
  WA_ISDEMANDDRIVENPRODUCTTP2-CONSUMPTIONCODE, sy-vline,
  WA_ISDEMANDDRIVENPRODUCTTP2-VARIABILITYCODE, sy-vline,
  WA_ISDEMANDDRIVENPRODUCTTP2-REPLENISHMENTLEADTIMECODE, sy-vline,
  WA_ISDEMANDDRIVENPRODUCTTP2-BOMUSAGECODE, sy-vline,
  WA_ISDEMANDDRIVENPRODUCTTP2-HORIZONDAYSINPAST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISDEMANDDRIVENPRODUCTTP2 you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_ISDEMANDDRIVENPRODUCTTP2 TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_ISDEMANDDRIVENPRODUCTTP2 INTO WA_ISDEMANDDRIVENPRODUCTTP2.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ISDEMANDDRIVENPRODUCTTP2-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISDEMANDDRIVENPRODUCTTP2-MATERIAL.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ISDEMANDDRIVENPRODUCTTP2_STR, 
KEY TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
MATERIAL TYPE STRING,
PLANT TYPE STRING,
MRPAREA TYPE STRING,
CONSUMPTIONCODE TYPE STRING,
VARIABILITYCODE TYPE STRING,
REPLENISHMENTLEADTIMECODE TYPE STRING,
BOMUSAGECODE TYPE STRING,
HORIZONDAYSINPAST TYPE STRING,
HORIZONDAYSINFUTURE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISDEMANDDRIVENPRODUCTTP2_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_ISDEMANDDRIVENPRODUCTTP2_STR-KEY sy-vline 
WA_ISDEMANDDRIVENPRODUCTTP2_STR-PARENT_KEY sy-vline 
WA_ISDEMANDDRIVENPRODUCTTP2_STR-ROOT_KEY sy-vline 
WA_ISDEMANDDRIVENPRODUCTTP2_STR-MATERIAL sy-vline 
WA_ISDEMANDDRIVENPRODUCTTP2_STR-PLANT sy-vline 
WA_ISDEMANDDRIVENPRODUCTTP2_STR-MRPAREA sy-vline 
WA_ISDEMANDDRIVENPRODUCTTP2_STR-CONSUMPTIONCODE sy-vline 
WA_ISDEMANDDRIVENPRODUCTTP2_STR-VARIABILITYCODE sy-vline 
WA_ISDEMANDDRIVENPRODUCTTP2_STR-REPLENISHMENTLEADTIMECODE sy-vline 
WA_ISDEMANDDRIVENPRODUCTTP2_STR-BOMUSAGECODE sy-vline 
WA_ISDEMANDDRIVENPRODUCTTP2_STR-HORIZONDAYSINPAST sy-vline 
WA_ISDEMANDDRIVENPRODUCTTP2_STR-HORIZONDAYSINFUTURE sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.