ABAP Select data from SAP table AFWKF_CATE_ATTR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AFWKF_CATE_ATTR
*  INTO TABLE @DATA(IT_AFWKF_CATE_ATTR2).
*--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_AFWKF_CATE_ATTR INDEX 1 INTO DATA(WA_AFWKF_CATE_ATTR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AFWKF_CATE_ATTR>-KFCATE = 1.
<AFWKF_CATE_ATTR>-APPLICATION = 1.
<AFWKF_CATE_ATTR>-BFCATE = 1.
<AFWKF_CATE_ATTR>-BFCATE2 = 1.
<AFWKF_CATE_ATTR>-TABNATTRIB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AFWKF_CATE_ATTR-TABHATTRIB, sy-vline,
  WA_AFWKF_CATE_ATTR-XGEN, sy-vline,
  WA_AFWKF_CATE_ATTR-XCURR, sy-vline,
  WA_AFWKF_CATE_ATTR-XRECORD, sy-vline,
  WA_AFWKF_CATE_ATTR-XFINAL, sy-vline,
  WA_AFWKF_CATE_ATTR-XADD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AFWKF_CATE_ATTR 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_AFWKF_CATE_ATTR 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_AFWKF_CATE_ATTR INTO WA_AFWKF_CATE_ATTR.


*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.
ENDFORM. 

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

TYPES: BEGIN OF T_AFWKF_CATE_ATTR_STR, 
KFCATE TYPE STRING,
APPLICATION TYPE STRING,
BFCATE TYPE STRING,
BFCATE2 TYPE STRING,
TABNATTRIB TYPE STRING,
TABHATTRIB TYPE STRING,
XGEN TYPE STRING,
XCURR TYPE STRING,
XRECORD TYPE STRING,
XFINAL TYPE STRING,
XADD TYPE STRING,
UNITID TYPE STRING,
XRKNOTEN TYPE STRING,
XFLOWTYPE TYPE STRING,
XEXPDATE TYPE STRING,
XSIMIDX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AFWKF_CATE_ATTR_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_AFWKF_CATE_ATTR_STR-KFCATE sy-vline 
WA_AFWKF_CATE_ATTR_STR-APPLICATION sy-vline 
WA_AFWKF_CATE_ATTR_STR-BFCATE sy-vline 
WA_AFWKF_CATE_ATTR_STR-BFCATE2 sy-vline 
WA_AFWKF_CATE_ATTR_STR-TABNATTRIB sy-vline 
WA_AFWKF_CATE_ATTR_STR-TABHATTRIB sy-vline 
WA_AFWKF_CATE_ATTR_STR-XGEN sy-vline 
WA_AFWKF_CATE_ATTR_STR-XCURR sy-vline 
WA_AFWKF_CATE_ATTR_STR-XRECORD sy-vline 
WA_AFWKF_CATE_ATTR_STR-XFINAL sy-vline 
WA_AFWKF_CATE_ATTR_STR-XADD sy-vline 
WA_AFWKF_CATE_ATTR_STR-UNITID sy-vline 
WA_AFWKF_CATE_ATTR_STR-XRKNOTEN sy-vline 
WA_AFWKF_CATE_ATTR_STR-XFLOWTYPE sy-vline 
WA_AFWKF_CATE_ATTR_STR-XEXPDATE sy-vline 
WA_AFWKF_CATE_ATTR_STR-XSIMIDX sy-vline      INTO ld_text SEPARATED BY SPACE.

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