ABAP Select data from SAP table WCSINFLUENCE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WCSINFLUENCE
*  INTO TABLE @DATA(IT_WCSINFLUENCE2).
*--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_WCSINFLUENCE INDEX 1 INTO DATA(WA_WCSINFLUENCE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WCSINFLUENCE>-REFERENCE = 1.
<WCSINFLUENCE>-REFTYP = 1.
<WCSINFLUENCE>-POPUP = 1.
<WCSINFLUENCE>-FSEL = 1.
<WCSINFLUENCE>-REFWC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WCSINFLUENCE-REFWAPI, sy-vline,
  WA_WCSINFLUENCE-REFWAP, sy-vline,
  WA_WCSINFLUENCE-REFORDER, sy-vline,
  WA_WCSINFLUENCE-OBJKEY, sy-vline,
  WA_WCSINFLUENCE-IWERK, sy-vline,
  WA_WCSINFLUENCE-OBJTYP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WCSINFLUENCE 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_WCSINFLUENCE 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_WCSINFLUENCE INTO WA_WCSINFLUENCE.


*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 ALPHA, internal->external for field REFWC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCSINFLUENCE-REFWC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCSINFLUENCE-REFWC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REFWAPI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCSINFLUENCE-REFWAPI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCSINFLUENCE-REFWAPI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REFWAP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCSINFLUENCE-REFWAP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCSINFLUENCE-REFWAP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REFORDER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCSINFLUENCE-REFORDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCSINFLUENCE-REFORDER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OBJKEY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCSINFLUENCE-OBJKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCSINFLUENCE-OBJKEY.
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_WCSINFLUENCE_STR, 
REFERENCE TYPE STRING,
REFTYP TYPE STRING,
POPUP TYPE STRING,
FSEL TYPE STRING,
REFWC TYPE STRING,
REFWAPI TYPE STRING,
REFWAP TYPE STRING,
REFORDER TYPE STRING,
OBJKEY TYPE STRING,
IWERK TYPE STRING,
OBJTYP TYPE STRING,
USECTRL TYPE STRING,
SCREEN TYPE STRING,
MENUE TYPE STRING,
AUTHORITY TYPE STRING,
ENQUEUE TYPE STRING,
TASK TYPE STRING,
OBJFLG TYPE STRING,
CP TYPE STRING,
BADGE TYPE STRING,
STACKTAB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WCSINFLUENCE_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_WCSINFLUENCE_STR-REFERENCE sy-vline 
WA_WCSINFLUENCE_STR-REFTYP sy-vline 
WA_WCSINFLUENCE_STR-POPUP sy-vline 
WA_WCSINFLUENCE_STR-FSEL sy-vline 
WA_WCSINFLUENCE_STR-REFWC sy-vline 
WA_WCSINFLUENCE_STR-REFWAPI sy-vline 
WA_WCSINFLUENCE_STR-REFWAP sy-vline 
WA_WCSINFLUENCE_STR-REFORDER sy-vline 
WA_WCSINFLUENCE_STR-OBJKEY sy-vline 
WA_WCSINFLUENCE_STR-IWERK sy-vline 
WA_WCSINFLUENCE_STR-OBJTYP sy-vline 
WA_WCSINFLUENCE_STR-USECTRL sy-vline 
WA_WCSINFLUENCE_STR-SCREEN sy-vline 
WA_WCSINFLUENCE_STR-MENUE sy-vline 
WA_WCSINFLUENCE_STR-AUTHORITY sy-vline 
WA_WCSINFLUENCE_STR-ENQUEUE sy-vline 
WA_WCSINFLUENCE_STR-TASK sy-vline 
WA_WCSINFLUENCE_STR-OBJFLG sy-vline 
WA_WCSINFLUENCE_STR-CP sy-vline 
WA_WCSINFLUENCE_STR-BADGE sy-vline 
WA_WCSINFLUENCE_STR-STACKTAB sy-vline      INTO ld_text SEPARATED BY SPACE.

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