ABAP Select data from SAP table WRF_PPW_WORKLIST_CHG_STY into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WRF_PPW_WORKLIST_CHG_STY 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_PPW_WORKLIST_CHG_STY. 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_PPW_WORKLIST_CHG_STY 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_PPW_WORKLIST_CHG_STY TYPE STANDARD TABLE OF WRF_PPW_WORKLIST_CHG_STY,
      WA_WRF_PPW_WORKLIST_CHG_STY TYPE WRF_PPW_WORKLIST_CHG_STY,
      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_PPW_WORKLIST_CHG_STY> TYPE WRF_PPW_WORKLIST_CHG_STY.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WRF_PPW_WORKLIST_CHG_STY
*  INTO TABLE @DATA(IT_WRF_PPW_WORKLIST_CHG_STY2).
*--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_PPW_WORKLIST_CHG_STY INDEX 1 INTO DATA(WA_WRF_PPW_WORKLIST_CHG_STY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WRF_PPW_WORKLIST_CHG_STY>-CONT = 1.
<WRF_PPW_WORKLIST_CHG_STY>-MANDT = 1.
<WRF_PPW_WORKLIST_CHG_STY>-GUID = 1.
<WRF_PPW_WORKLIST_CHG_STY>-MATNR = 1.
<WRF_PPW_WORKLIST_CHG_STY>-COLOR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WRF_PPW_WORKLIST_CHG_STY-SIZE1, sy-vline,
  WA_WRF_PPW_WORKLIST_CHG_STY-VKORG, sy-vline,
  WA_WRF_PPW_WORKLIST_CHG_STY-VTWEG, sy-vline,
  WA_WRF_PPW_WORKLIST_CHG_STY-PLTYP, sy-vline,
  WA_WRF_PPW_WORKLIST_CHG_STY-WERKS, sy-vline,
  WA_WRF_PPW_WORKLIST_CHG_STY-STGRTP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WRF_PPW_WORKLIST_CHG_STY 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_PPW_WORKLIST_CHG_STY 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_PPW_WORKLIST_CHG_STY INTO WA_WRF_PPW_WORKLIST_CHG_STY.


*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_PPW_WORKLIST_CHG_STY-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_PPW_WORKLIST_CHG_STY-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_WRF_PPW_WORKLIST_CHG_STY-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_PPW_WORKLIST_CHG_STY-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field PMATN
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WRF_PPW_WORKLIST_CHG_STY-PMATN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_PPW_WORKLIST_CHG_STY-PMATN.
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_PPW_WORKLIST_CHG_STY_STR, 
CONT TYPE STRING,
MANDT TYPE STRING,
GUID TYPE STRING,
MATNR TYPE STRING,
COLOR TYPE STRING,
SIZE1 TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
PLTYP TYPE STRING,
WERKS TYPE STRING,
STGRTP TYPE STRING,
STRGRP TYPE STRING,
ANLDATE TYPE STRING,
PERIV TYPE STRING,
POPER TYPE STRING,
GJAHR TYPE STRING,
MDPROF TYPE STRING,
ACTSLSRTIO TYPE STRING,
TARGSLSRTIO TYPE STRING,
MDPRC TYPE STRING,
STOCK TYPE STRING,
SELLPER TYPE STRING,
ERSDA TYPE STRING,
STOCKUNIT TYPE STRING,
MAXPER TYPE STRING,
ANEPRL TYPE STRING,
NOLOC TYPE STRING,
RUN_NO TYPE STRING,
WLSTA TYPE STRING,
ERRSTA TYPE STRING,
PMATN TYPE STRING,
ATTYP TYPE STRING,
SISTER TYPE STRING,
USRGRP TYPE STRING,
OBJECT TYPE STRING,
SUBOBJECT TYPE STRING,
EXT_NUMBER TYPE STRING,
ERNAM TYPE STRING,
LAEDA TYPE STRING,
AENAM TYPE STRING,
CHGID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WRF_PPW_WORKLIST_CHG_STY_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_PPW_WORKLIST_CHG_STY_STR-CONT sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-MANDT sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-GUID sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-MATNR sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-COLOR sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-SIZE1 sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-VKORG sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-VTWEG sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-PLTYP sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-WERKS sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-STGRTP sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-STRGRP sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-ANLDATE sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-PERIV sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-POPER sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-GJAHR sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-MDPROF sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-ACTSLSRTIO sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-TARGSLSRTIO sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-MDPRC sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-STOCK sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-SELLPER sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-ERSDA sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-STOCKUNIT sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-MAXPER sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-ANEPRL sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-NOLOC sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-RUN_NO sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-WLSTA sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-ERRSTA sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-PMATN sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-ATTYP sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-SISTER sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-USRGRP sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-OBJECT sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-SUBOBJECT sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-EXT_NUMBER sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-ERNAM sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-LAEDA sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-AENAM sy-vline 
WA_WRF_PPW_WORKLIST_CHG_STY_STR-CHGID sy-vline      INTO ld_text SEPARATED BY SPACE.

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