ABAP Select data from SAP table WRF_APC_PAPUR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WRF_APC_PAPUR
*  INTO TABLE @DATA(IT_WRF_APC_PAPUR2).
*--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_WRF_APC_PAPUR INDEX 1 INTO DATA(WA_WRF_APC_PAPUR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WRF_APC_PAPUR>-MANDT = 1.
<WRF_APC_PAPUR>-MATNR = 1.
<WRF_APC_PAPUR>-CHAR1 = 1.
<WRF_APC_PAPUR>-CHAR2 = 1.
<WRF_APC_PAPUR>-CHAR3 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WRF_APC_PAPUR-EKORG, sy-vline,
  WA_WRF_APC_PAPUR-LIFNR, sy-vline,
  WA_WRF_APC_PAPUR-EKGRP, sy-vline,
  WA_WRF_APC_PAPUR-NETPR, sy-vline,
  WA_WRF_APC_PAPUR-WAERS, sy-vline,
  WA_WRF_APC_PAPUR-NETPR_VEN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WRF_APC_PAPUR 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_WRF_APC_PAPUR 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_WRF_APC_PAPUR INTO WA_WRF_APC_PAPUR.


*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 MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WRF_APC_PAPUR-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_APC_PAPUR-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WRF_APC_PAPUR-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_APC_PAPUR-UNIT.
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_WRF_APC_PAPUR_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
CHAR1 TYPE STRING,
CHAR2 TYPE STRING,
CHAR3 TYPE STRING,
EKORG TYPE STRING,
LIFNR TYPE STRING,
EKGRP TYPE STRING,
NETPR TYPE STRING,
WAERS TYPE STRING,
NETPR_VEN TYPE STRING,
WAERS_VEN TYPE STRING,
UNIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WRF_APC_PAPUR_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_WRF_APC_PAPUR_STR-MANDT sy-vline 
WA_WRF_APC_PAPUR_STR-MATNR sy-vline 
WA_WRF_APC_PAPUR_STR-CHAR1 sy-vline 
WA_WRF_APC_PAPUR_STR-CHAR2 sy-vline 
WA_WRF_APC_PAPUR_STR-CHAR3 sy-vline 
WA_WRF_APC_PAPUR_STR-EKORG sy-vline 
WA_WRF_APC_PAPUR_STR-LIFNR sy-vline 
WA_WRF_APC_PAPUR_STR-EKGRP sy-vline 
WA_WRF_APC_PAPUR_STR-NETPR sy-vline 
WA_WRF_APC_PAPUR_STR-WAERS sy-vline 
WA_WRF_APC_PAPUR_STR-NETPR_VEN sy-vline 
WA_WRF_APC_PAPUR_STR-WAERS_VEN sy-vline 
WA_WRF_APC_PAPUR_STR-UNIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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