ABAP Select data from SAP table WRF_MATGRP_MD6 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WRF_MATGRP_MD6 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_MATGRP_MD6. 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_MATGRP_MD6 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_MATGRP_MD6 TYPE STANDARD TABLE OF WRF_MATGRP_MD6,
      WA_WRF_MATGRP_MD6 TYPE WRF_MATGRP_MD6,
      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_MATGRP_MD6> TYPE WRF_MATGRP_MD6.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WRF_MATGRP_MD6.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WRF_MATGRP_MD6
  INTO TABLE IT_WRF_MATGRP_MD6.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WRF_MATGRP_MD6
*  INTO TABLE @DATA(IT_WRF_MATGRP_MD62).
*--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_MATGRP_MD6 INDEX 1 INTO DATA(WA_WRF_MATGRP_MD62).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WRF_MATGRP_MD6 ASSIGNING <WRF_MATGRP_MD6>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WRF_MATGRP_MD6>-MANDT = 1.
<WRF_MATGRP_MD6>-NODE = 1.
<WRF_MATGRP_MD6>-HIER_ID = 1.
<WRF_MATGRP_MD6>-DATE_FROM = 1.
<WRF_MATGRP_MD6>-DATE_TO = 1.

ENDLOOP.

LOOP AT IT_WRF_MATGRP_MD6 INTO WA_WRF_MATGRP_MD6.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WRF_MATGRP_MD6-ROLE, sy-vline,
  WA_WRF_MATGRP_MD6-STRATEGY, sy-vline,
  WA_WRF_MATGRP_MD6-PARENT, sy-vline,
  WA_WRF_MATGRP_MD6-HIERNODE1, sy-vline,
  WA_WRF_MATGRP_MD6-HIERNODE2, sy-vline,
  WA_WRF_MATGRP_MD6-HIERNODE3, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WRF_MATGRP_MD6 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_MATGRP_MD6 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_MATGRP_MD6 INTO WA_WRF_MATGRP_MD6.


*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 CUNIT, internal->external for field SPACEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WRF_MATGRP_MD6-SPACEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_MATGRP_MD6-SPACEUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field LINUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WRF_MATGRP_MD6-LINUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_MATGRP_MD6-LINUNIT.
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_MATGRP_MD6_STR, 
MANDT TYPE STRING,
NODE TYPE STRING,
HIER_ID TYPE STRING,
DATE_FROM TYPE STRING,
DATE_TO TYPE STRING,
ROLE TYPE STRING,
STRATEGY TYPE STRING,
PARENT TYPE STRING,
HIERNODE1 TYPE STRING,
HIERNODE2 TYPE STRING,
HIERNODE3 TYPE STRING,
HIERNODE4 TYPE STRING,
HIERNODE5 TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
TREE_LEVEL TYPE STRING,
SHLFSPC TYPE STRING,
LINSPC TYPE STRING,
SPACEUNIT TYPE STRING,
LINUNIT TYPE STRING,
STORES TYPE STRING,
CHKDATE TYPE STRING,
TIMESTAMP TYPE STRING,
DELETEFLAG TYPE STRING,
EPRGR TYPE STRING,
PRODUCTCLF TYPE STRING,
PRICE_GROUP TYPE STRING,
REFERENCE TYPE STRING,
RESPONSIBILITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WRF_MATGRP_MD6_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_MATGRP_MD6_STR-MANDT sy-vline 
WA_WRF_MATGRP_MD6_STR-NODE sy-vline 
WA_WRF_MATGRP_MD6_STR-HIER_ID sy-vline 
WA_WRF_MATGRP_MD6_STR-DATE_FROM sy-vline 
WA_WRF_MATGRP_MD6_STR-DATE_TO sy-vline 
WA_WRF_MATGRP_MD6_STR-ROLE sy-vline 
WA_WRF_MATGRP_MD6_STR-STRATEGY sy-vline 
WA_WRF_MATGRP_MD6_STR-PARENT sy-vline 
WA_WRF_MATGRP_MD6_STR-HIERNODE1 sy-vline 
WA_WRF_MATGRP_MD6_STR-HIERNODE2 sy-vline 
WA_WRF_MATGRP_MD6_STR-HIERNODE3 sy-vline 
WA_WRF_MATGRP_MD6_STR-HIERNODE4 sy-vline 
WA_WRF_MATGRP_MD6_STR-HIERNODE5 sy-vline 
WA_WRF_MATGRP_MD6_STR-VKORG sy-vline 
WA_WRF_MATGRP_MD6_STR-VTWEG sy-vline 
WA_WRF_MATGRP_MD6_STR-TREE_LEVEL sy-vline 
WA_WRF_MATGRP_MD6_STR-SHLFSPC sy-vline 
WA_WRF_MATGRP_MD6_STR-LINSPC sy-vline 
WA_WRF_MATGRP_MD6_STR-SPACEUNIT sy-vline 
WA_WRF_MATGRP_MD6_STR-LINUNIT sy-vline 
WA_WRF_MATGRP_MD6_STR-STORES sy-vline 
WA_WRF_MATGRP_MD6_STR-CHKDATE sy-vline 
WA_WRF_MATGRP_MD6_STR-TIMESTAMP sy-vline 
WA_WRF_MATGRP_MD6_STR-DELETEFLAG sy-vline 
WA_WRF_MATGRP_MD6_STR-EPRGR sy-vline 
WA_WRF_MATGRP_MD6_STR-PRODUCTCLF sy-vline 
WA_WRF_MATGRP_MD6_STR-PRICE_GROUP sy-vline 
WA_WRF_MATGRP_MD6_STR-REFERENCE sy-vline 
WA_WRF_MATGRP_MD6_STR-RESPONSIBILITY sy-vline      INTO ld_text SEPARATED BY SPACE.

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