ABAP Select data from SAP table WCSWAPICTRL into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WCSWAPICTRL 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 WCSWAPICTRL. 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 WCSWAPICTRL 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_WCSWAPICTRL TYPE STANDARD TABLE OF WCSWAPICTRL,
      WA_WCSWAPICTRL TYPE WCSWAPICTRL,
      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: <WCSWAPICTRL> TYPE WCSWAPICTRL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WCSWAPICTRL
*  INTO TABLE @DATA(IT_WCSWAPICTRL2).
*--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_WCSWAPICTRL INDEX 1 INTO DATA(WA_WCSWAPICTRL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WCSWAPICTRL>-USED = 1.
<WCSWAPICTRL>-CPPREPFLG = 1.
<WCSWAPICTRL>-CPCHGNFLG = 1.
<WCSWAPICTRL>-CPCATFLG = 1.
<WCSWAPICTRL>-CPOBJLSTFLG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WCSWAPICTRL-CPAPRVFLG, sy-vline,
  WA_WCSWAPICTRL-CPASGNFLG, sy-vline,
  WA_WCSWAPICTRL-DEFAULT1, sy-vline,
  WA_WCSWAPICTRL-DEFAULT2, sy-vline,
  WA_WCSWAPICTRL-DEFAULT3, sy-vline,
  WA_WCSWAPICTRL-DEFAULT4, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WCSWAPICTRL 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_WCSWAPICTRL 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_WCSWAPICTRL INTO WA_WCSWAPICTRL.


*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_WCSWAPICTRL_STR, 
USED TYPE STRING,
CPPREPFLG TYPE STRING,
CPCHGNFLG TYPE STRING,
CPCATFLG TYPE STRING,
CPOBJLSTFLG TYPE STRING,
CPAPRVFLG TYPE STRING,
CPASGNFLG TYPE STRING,
DEFAULT1 TYPE STRING,
DEFAULT2 TYPE STRING,
DEFAULT3 TYPE STRING,
DEFAULT4 TYPE STRING,
CPPWPFLG TYPE STRING,
MS1FLG TYPE STRING,
MS1 TYPE STRING,
CPCWPFLG TYPE STRING,
CPHOWPFLG TYPE STRING,
CPRWPFLG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WCSWAPICTRL_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_WCSWAPICTRL_STR-USED sy-vline 
WA_WCSWAPICTRL_STR-CPPREPFLG sy-vline 
WA_WCSWAPICTRL_STR-CPCHGNFLG sy-vline 
WA_WCSWAPICTRL_STR-CPCATFLG sy-vline 
WA_WCSWAPICTRL_STR-CPOBJLSTFLG sy-vline 
WA_WCSWAPICTRL_STR-CPAPRVFLG sy-vline 
WA_WCSWAPICTRL_STR-CPASGNFLG sy-vline 
WA_WCSWAPICTRL_STR-DEFAULT1 sy-vline 
WA_WCSWAPICTRL_STR-DEFAULT2 sy-vline 
WA_WCSWAPICTRL_STR-DEFAULT3 sy-vline 
WA_WCSWAPICTRL_STR-DEFAULT4 sy-vline 
WA_WCSWAPICTRL_STR-CPPWPFLG sy-vline 
WA_WCSWAPICTRL_STR-MS1FLG sy-vline 
WA_WCSWAPICTRL_STR-MS1 sy-vline 
WA_WCSWAPICTRL_STR-CPCWPFLG sy-vline 
WA_WCSWAPICTRL_STR-CPHOWPFLG sy-vline 
WA_WCSWAPICTRL_STR-CPRWPFLG sy-vline      INTO ld_text SEPARATED BY SPACE.

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