ABAP Select data from SAP table EWAEL_WDPPROC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EWAEL_WDPPROC
*  INTO TABLE @DATA(IT_EWAEL_WDPPROC2).
*--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_EWAEL_WDPPROC INDEX 1 INTO DATA(WA_EWAEL_WDPPROC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EWAEL_WDPPROC>-MANDT = 1.
<EWAEL_WDPPROC>-WDPPROCNR = 1.
<EWAEL_WDPPROC>-WDPPROCDATE = 1.
<EWAEL_WDPPROC>-BOOKDATE = 1.
<EWAEL_WDPPROC>-REVOCATIONDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EWAEL_WDPPROC-WDPPROTYNR, sy-vline,
  WA_EWAEL_WDPPROC-WDPLANTNR, sy-vline,
  WA_EWAEL_WDPPROC-OPENQUANTITY, sy-vline,
  WA_EWAEL_WDPPROC-NOTE, sy-vline,
  WA_EWAEL_WDPPROC-KAPID, sy-vline,
  WA_EWAEL_WDPPROC-VERSN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EWAEL_WDPPROC 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_EWAEL_WDPPROC 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_EWAEL_WDPPROC INTO WA_EWAEL_WDPPROC.


*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 WDPPROCNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWAEL_WDPPROC-WDPPROCNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWAEL_WDPPROC-WDPPROCNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWAEL_WDPPROC-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWAEL_WDPPROC-KOSTL.
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_EWAEL_WDPPROC_STR, 
MANDT TYPE STRING,
WDPPROCNR TYPE STRING,
WDPPROCDATE TYPE STRING,
BOOKDATE TYPE STRING,
REVOCATIONDATE TYPE STRING,
WDPPROTYNR TYPE STRING,
WDPLANTNR TYPE STRING,
OPENQUANTITY TYPE STRING,
NOTE TYPE STRING,
KAPID TYPE STRING,
VERSN TYPE STRING,
DATUB TYPE STRING,
TAGNR TYPE STRING,
SCHNR TYPE STRING,
SCHDATUM TYPE STRING,
SCHUZEIT TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
BEGRU TYPE STRING,
LOEVM TYPE STRING,
DESCRIPTION TYPE STRING,
KOKRS TYPE STRING,
KOSTL TYPE STRING,
DATBI TYPE STRING,
ISSPLITTING TYPE STRING,
WERKS TYPE STRING,
WDPLANTTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EWAEL_WDPPROC_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_EWAEL_WDPPROC_STR-MANDT sy-vline 
WA_EWAEL_WDPPROC_STR-WDPPROCNR sy-vline 
WA_EWAEL_WDPPROC_STR-WDPPROCDATE sy-vline 
WA_EWAEL_WDPPROC_STR-BOOKDATE sy-vline 
WA_EWAEL_WDPPROC_STR-REVOCATIONDATE sy-vline 
WA_EWAEL_WDPPROC_STR-WDPPROTYNR sy-vline 
WA_EWAEL_WDPPROC_STR-WDPLANTNR sy-vline 
WA_EWAEL_WDPPROC_STR-OPENQUANTITY sy-vline 
WA_EWAEL_WDPPROC_STR-NOTE sy-vline 
WA_EWAEL_WDPPROC_STR-KAPID sy-vline 
WA_EWAEL_WDPPROC_STR-VERSN sy-vline 
WA_EWAEL_WDPPROC_STR-DATUB sy-vline 
WA_EWAEL_WDPPROC_STR-TAGNR sy-vline 
WA_EWAEL_WDPPROC_STR-SCHNR sy-vline 
WA_EWAEL_WDPPROC_STR-SCHDATUM sy-vline 
WA_EWAEL_WDPPROC_STR-SCHUZEIT sy-vline 
WA_EWAEL_WDPPROC_STR-ERDAT sy-vline 
WA_EWAEL_WDPPROC_STR-ERNAM sy-vline 
WA_EWAEL_WDPPROC_STR-AEDAT sy-vline 
WA_EWAEL_WDPPROC_STR-AENAM sy-vline 
WA_EWAEL_WDPPROC_STR-BEGRU sy-vline 
WA_EWAEL_WDPPROC_STR-LOEVM sy-vline 
WA_EWAEL_WDPPROC_STR-DESCRIPTION sy-vline 
WA_EWAEL_WDPPROC_STR-KOKRS sy-vline 
WA_EWAEL_WDPPROC_STR-KOSTL sy-vline 
WA_EWAEL_WDPPROC_STR-DATBI sy-vline 
WA_EWAEL_WDPPROC_STR-ISSPLITTING sy-vline 
WA_EWAEL_WDPPROC_STR-WERKS sy-vline 
WA_EWAEL_WDPPROC_STR-WDPLANTTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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