ABAP Select data from SAP table WEPSC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WEPSC
*  INTO TABLE @DATA(IT_WEPSC2).
*--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_WEPSC INDEX 1 INTO DATA(WA_WEPSC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WEPSC>-EPSSRVDES = 1.
<WEPSC>-EPSRFCDOC = 1.
<WEPSC>-EPSRECTRA = 1.
<WEPSC>-EPSSERVER = 1.
<WEPSC>-EPSCLIENT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WEPSC-EPSTRAMON, sy-vline,
  WA_WEPSC-EPSTRAMON1, sy-vline,
  WA_WEPSC-EPSCONFIRM, sy-vline,
  WA_WEPSC-EPSCONFIR1, sy-vline,
  WA_WEPSC-EPSSEND, sy-vline,
  WA_WEPSC-EPSRECEIVE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WEPSC 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_WEPSC 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_WEPSC INTO WA_WEPSC.


*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_WEPSC_STR, 
EPSSRVDES TYPE STRING,
EPSRFCDOC TYPE STRING,
EPSRECTRA TYPE STRING,
EPSSERVER TYPE STRING,
EPSCLIENT TYPE STRING,
EPSTRAMON TYPE STRING,
EPSTRAMON1 TYPE STRING,
EPSCONFIRM TYPE STRING,
EPSCONFIR1 TYPE STRING,
EPSSEND TYPE STRING,
EPSRECEIVE TYPE STRING,
EPSSTART TYPE STRING,
EPSPARCEL TYPE STRING,
EPSSUBJECT TYPE STRING,
EPSCOMMENT TYPE STRING,
EPSRSPUSR TYPE STRING,
EPSFILSIZ TYPE STRING,
EPSTARDIR TYPE STRING,
EPSTARFIL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WEPSC_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_WEPSC_STR-EPSSRVDES sy-vline 
WA_WEPSC_STR-EPSRFCDOC sy-vline 
WA_WEPSC_STR-EPSRECTRA sy-vline 
WA_WEPSC_STR-EPSSERVER sy-vline 
WA_WEPSC_STR-EPSCLIENT sy-vline 
WA_WEPSC_STR-EPSTRAMON sy-vline 
WA_WEPSC_STR-EPSTRAMON1 sy-vline 
WA_WEPSC_STR-EPSCONFIRM sy-vline 
WA_WEPSC_STR-EPSCONFIR1 sy-vline 
WA_WEPSC_STR-EPSSEND sy-vline 
WA_WEPSC_STR-EPSRECEIVE sy-vline 
WA_WEPSC_STR-EPSSTART sy-vline 
WA_WEPSC_STR-EPSPARCEL sy-vline 
WA_WEPSC_STR-EPSSUBJECT sy-vline 
WA_WEPSC_STR-EPSCOMMENT sy-vline 
WA_WEPSC_STR-EPSRSPUSR sy-vline 
WA_WEPSC_STR-EPSFILSIZ sy-vline 
WA_WEPSC_STR-EPSTARDIR sy-vline 
WA_WEPSC_STR-EPSTARFIL sy-vline      INTO ld_text SEPARATED BY SPACE.

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