ABAP Select data from SAP table DIWPS_CRD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DIWPS_CRD 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 DIWPS_CRD. 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 DIWPS_CRD 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_DIWPS_CRD TYPE STANDARD TABLE OF DIWPS_CRD,
      WA_DIWPS_CRD TYPE DIWPS_CRD,
      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: <DIWPS_CRD> TYPE DIWPS_CRD.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DIWPS_CRD
*  INTO TABLE @DATA(IT_DIWPS_CRD2).
*--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_DIWPS_CRD INDEX 1 INTO DATA(WA_DIWPS_CRD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DIWPS_CRD>-SEL_FLG = 1.
<DIWPS_CRD>-MANDT = 1.
<DIWPS_CRD>-WPID = 1.
<DIWPS_CRD>-NOTIFID = 1.
<DIWPS_CRD>-TL_COUNTER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DIWPS_CRD-PARENT_PLNTY, sy-vline,
  WA_DIWPS_CRD-PARENT_PLNNR, sy-vline,
  WA_DIWPS_CRD-PARENT_PLNAL, sy-vline,
  WA_DIWPS_CRD-PARENT_ZAEHL, sy-vline,
  WA_DIWPS_CRD-PLNTY, sy-vline,
  WA_DIWPS_CRD-PLNNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DIWPS_CRD 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_DIWPS_CRD 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_DIWPS_CRD INTO WA_DIWPS_CRD.


*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 ALPHA, internal->external for field WPID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DIWPS_CRD-WPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIWPS_CRD-WPID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NOTIFID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DIWPS_CRD-NOTIFID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIWPS_CRD-NOTIFID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PARENT_PLNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DIWPS_CRD-PARENT_PLNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIWPS_CRD-PARENT_PLNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PARENT_PLNAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DIWPS_CRD-PARENT_PLNAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIWPS_CRD-PARENT_PLNAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DIWPS_CRD-PLNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIWPS_CRD-PLNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DIWPS_CRD-PLNAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIWPS_CRD-PLNAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORDER_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DIWPS_CRD-ORDER_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIWPS_CRD-ORDER_NO.
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_DIWPS_CRD_STR, 
SEL_FLG TYPE STRING,
MANDT TYPE STRING,
WPID TYPE STRING,
NOTIFID TYPE STRING,
TL_COUNTER TYPE STRING,
PARENT_PLNTY TYPE STRING,
PARENT_PLNNR TYPE STRING,
PARENT_PLNAL TYPE STRING,
PARENT_ZAEHL TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
ZAEHL TYPE STRING,
NID_SUPTL TYPE STRING,
NID_CURTL TYPE STRING,
FET_FLG TYPE STRING,
EXPLOSION_NO TYPE STRING,
ORDER_NO TYPE STRING,
QMEL_ORDER_FLG TYPE STRING,
ORDER_STATUS_FLG TYPE STRING,
QMART TYPE STRING,
EXCL_FLG TYPE STRING,
NO_EXEC_FLG TYPE STRING,
ELIMSUBTR_FLG TYPE STRING,
DEL_FLG TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DIWPS_CRD_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_DIWPS_CRD_STR-SEL_FLG sy-vline 
WA_DIWPS_CRD_STR-MANDT sy-vline 
WA_DIWPS_CRD_STR-WPID sy-vline 
WA_DIWPS_CRD_STR-NOTIFID sy-vline 
WA_DIWPS_CRD_STR-TL_COUNTER sy-vline 
WA_DIWPS_CRD_STR-PARENT_PLNTY sy-vline 
WA_DIWPS_CRD_STR-PARENT_PLNNR sy-vline 
WA_DIWPS_CRD_STR-PARENT_PLNAL sy-vline 
WA_DIWPS_CRD_STR-PARENT_ZAEHL sy-vline 
WA_DIWPS_CRD_STR-PLNTY sy-vline 
WA_DIWPS_CRD_STR-PLNNR sy-vline 
WA_DIWPS_CRD_STR-PLNAL sy-vline 
WA_DIWPS_CRD_STR-ZAEHL sy-vline 
WA_DIWPS_CRD_STR-NID_SUPTL sy-vline 
WA_DIWPS_CRD_STR-NID_CURTL sy-vline 
WA_DIWPS_CRD_STR-FET_FLG sy-vline 
WA_DIWPS_CRD_STR-EXPLOSION_NO sy-vline 
WA_DIWPS_CRD_STR-ORDER_NO sy-vline 
WA_DIWPS_CRD_STR-QMEL_ORDER_FLG sy-vline 
WA_DIWPS_CRD_STR-ORDER_STATUS_FLG sy-vline 
WA_DIWPS_CRD_STR-QMART sy-vline 
WA_DIWPS_CRD_STR-EXCL_FLG sy-vline 
WA_DIWPS_CRD_STR-NO_EXEC_FLG sy-vline 
WA_DIWPS_CRD_STR-ELIMSUBTR_FLG sy-vline 
WA_DIWPS_CRD_STR-DEL_FLG sy-vline 
WA_DIWPS_CRD_STR-AENAM sy-vline 
WA_DIWPS_CRD_STR-AEDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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