ABAP Select data from SAP table WFAFC_CALCPARAMS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WFAFC_CALCPARAMS
*  INTO TABLE @DATA(IT_WFAFC_CALCPARAMS2).
*--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_WFAFC_CALCPARAMS INDEX 1 INTO DATA(WA_WFAFC_CALCPARAMS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WFAFC_CALCPARAMS>-MANDT = 1.
<WFAFC_CALCPARAMS>-CALCPARAMS_CODE = 1.
<WFAFC_CALCPARAMS>-PRMOD = 1.
<WFAFC_CALCPARAMS>-MODAW = 1.
<WFAFC_CALCPARAMS>-MODAV = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WFAFC_CALCPARAMS-KZPAR, sy-vline,
  WA_WFAFC_CALCPARAMS-OPGRA, sy-vline,
  WA_WFAFC_CALCPARAMS-KZINI, sy-vline,
  WA_WFAFC_CALCPARAMS-ALPHA, sy-vline,
  WA_WFAFC_CALCPARAMS-BETA1, sy-vline,
  WA_WFAFC_CALCPARAMS-GAMMA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WFAFC_CALCPARAMS 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_WFAFC_CALCPARAMS 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_WFAFC_CALCPARAMS INTO WA_WFAFC_CALCPARAMS.


*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_WFAFC_CALCPARAMS_STR, 
MANDT TYPE STRING,
CALCPARAMS_CODE TYPE STRING,
PRMOD TYPE STRING,
MODAW TYPE STRING,
MODAV TYPE STRING,
KZPAR TYPE STRING,
OPGRA TYPE STRING,
KZINI TYPE STRING,
ALPHA TYPE STRING,
BETA1 TYPE STRING,
GAMMA TYPE STRING,
DELTA TYPE STRING,
EPSIL TYPE STRING,
SIGGR TYPE STRING,
PERAN TYPE STRING,
PERIN TYPE STRING,
PEREX TYPE STRING,
PERIO TYPE STRING,
ANZPR TYPE STRING,
FIMON TYPE STRING,
LGRAD TYPE STRING,
GWERT TYPE STRING,
VMGWE TYPE STRING,
GWER1 TYPE STRING,
VMGW1 TYPE STRING,
GWER2 TYPE STRING,
VMGW2 TYPE STRING,
TWERT TYPE STRING,
VMTWE TYPE STRING,
PRMAD TYPE STRING,
VMMAD TYPE STRING,
FSUMM TYPE STRING,
VMFSU TYPE STRING,
AUSNA TYPE STRING,
PROAB TYPE STRING,
KZOKO TYPE STRING,
GEWGR TYPE STRING,
THKOF TYPE STRING,
NULLV TYPE STRING,
PRWUG TYPE STRING,
PRWOG TYPE STRING,
PRROS TYPE STRING,
PRKUM TYPE STRING,
PRZGF TYPE STRING,
AKTPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WFAFC_CALCPARAMS_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_WFAFC_CALCPARAMS_STR-MANDT sy-vline 
WA_WFAFC_CALCPARAMS_STR-CALCPARAMS_CODE sy-vline 
WA_WFAFC_CALCPARAMS_STR-PRMOD sy-vline 
WA_WFAFC_CALCPARAMS_STR-MODAW sy-vline 
WA_WFAFC_CALCPARAMS_STR-MODAV sy-vline 
WA_WFAFC_CALCPARAMS_STR-KZPAR sy-vline 
WA_WFAFC_CALCPARAMS_STR-OPGRA sy-vline 
WA_WFAFC_CALCPARAMS_STR-KZINI sy-vline 
WA_WFAFC_CALCPARAMS_STR-ALPHA sy-vline 
WA_WFAFC_CALCPARAMS_STR-BETA1 sy-vline 
WA_WFAFC_CALCPARAMS_STR-GAMMA sy-vline 
WA_WFAFC_CALCPARAMS_STR-DELTA sy-vline 
WA_WFAFC_CALCPARAMS_STR-EPSIL sy-vline 
WA_WFAFC_CALCPARAMS_STR-SIGGR sy-vline 
WA_WFAFC_CALCPARAMS_STR-PERAN sy-vline 
WA_WFAFC_CALCPARAMS_STR-PERIN sy-vline 
WA_WFAFC_CALCPARAMS_STR-PEREX sy-vline 
WA_WFAFC_CALCPARAMS_STR-PERIO sy-vline 
WA_WFAFC_CALCPARAMS_STR-ANZPR sy-vline 
WA_WFAFC_CALCPARAMS_STR-FIMON sy-vline 
WA_WFAFC_CALCPARAMS_STR-LGRAD sy-vline 
WA_WFAFC_CALCPARAMS_STR-GWERT sy-vline 
WA_WFAFC_CALCPARAMS_STR-VMGWE sy-vline 
WA_WFAFC_CALCPARAMS_STR-GWER1 sy-vline 
WA_WFAFC_CALCPARAMS_STR-VMGW1 sy-vline 
WA_WFAFC_CALCPARAMS_STR-GWER2 sy-vline 
WA_WFAFC_CALCPARAMS_STR-VMGW2 sy-vline 
WA_WFAFC_CALCPARAMS_STR-TWERT sy-vline 
WA_WFAFC_CALCPARAMS_STR-VMTWE sy-vline 
WA_WFAFC_CALCPARAMS_STR-PRMAD sy-vline 
WA_WFAFC_CALCPARAMS_STR-VMMAD sy-vline 
WA_WFAFC_CALCPARAMS_STR-FSUMM sy-vline 
WA_WFAFC_CALCPARAMS_STR-VMFSU sy-vline 
WA_WFAFC_CALCPARAMS_STR-AUSNA sy-vline 
WA_WFAFC_CALCPARAMS_STR-PROAB sy-vline 
WA_WFAFC_CALCPARAMS_STR-KZOKO sy-vline 
WA_WFAFC_CALCPARAMS_STR-GEWGR sy-vline 
WA_WFAFC_CALCPARAMS_STR-THKOF sy-vline 
WA_WFAFC_CALCPARAMS_STR-NULLV sy-vline 
WA_WFAFC_CALCPARAMS_STR-PRWUG sy-vline 
WA_WFAFC_CALCPARAMS_STR-PRWOG sy-vline 
WA_WFAFC_CALCPARAMS_STR-PRROS sy-vline 
WA_WFAFC_CALCPARAMS_STR-PRKUM sy-vline 
WA_WFAFC_CALCPARAMS_STR-PRZGF sy-vline 
WA_WFAFC_CALCPARAMS_STR-AKTPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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