ABAP Select data from SAP table WCSHEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WCSHEADER
*  INTO TABLE @DATA(IT_WCSHEADER2).
*--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_WCSHEADER INDEX 1 INTO DATA(WA_WCSHEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WCSHEADER>-STXT = 1.
<WCSHEADER>-LFLG = 1.
<WCSHEADER>-DELFLG = 1.
<WCSHEADER>-REJCFLG = 1.
<WCSHEADER>-UNTGFLG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WCSHEADER-TGFLG, sy-vline,
  WA_WCSHEADER-REQUALFLG, sy-vline,
  WA_WCSHEADER-CATFLG1, sy-vline,
  WA_WCSHEADER-CATFLG2, sy-vline,
  WA_WCSHEADER-DATEFR, sy-vline,
  WA_WCSHEADER-TIMEFR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WCSHEADER 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_WCSHEADER 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_WCSHEADER INTO WA_WCSHEADER.


*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 CUNIT, internal->external for field RCUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WCSHEADER-RCUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCSHEADER-RCUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REFKEY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCSHEADER-REFKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCSHEADER-REFKEY.
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_WCSHEADER_STR, 
STXT TYPE STRING,
LFLG TYPE STRING,
DELFLG TYPE STRING,
REJCFLG TYPE STRING,
UNTGFLG TYPE STRING,
TGFLG TYPE STRING,
REQUALFLG TYPE STRING,
CATFLG1 TYPE STRING,
CATFLG2 TYPE STRING,
DATEFR TYPE STRING,
TIMEFR TYPE STRING,
DATETO TYPE STRING,
TIMETO TYPE STRING,
EXTPERIOD TYPE STRING,
ANLZU TYPE STRING,
ANLZUX TYPE STRING,
RCTIME TYPE STRING,
RCUNIT TYPE STRING,
PRIOK TYPE STRING,
PRIOKX TYPE STRING,
ETAPE TYPE STRING,
ETAPEX TYPE STRING,
DOCFLG TYPE STRING,
PARFLG TYPE STRING,
REFKEY TYPE STRING,
REFTXT TYPE STRING,
REFOBJ TYPE STRING,
REFART TYPE STRING,
REFTYP TYPE STRING,
PB_TEXT TYPE STRING,
REMARKFLG1 TYPE STRING,
REMARKFLG2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WCSHEADER_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_WCSHEADER_STR-STXT sy-vline 
WA_WCSHEADER_STR-LFLG sy-vline 
WA_WCSHEADER_STR-DELFLG sy-vline 
WA_WCSHEADER_STR-REJCFLG sy-vline 
WA_WCSHEADER_STR-UNTGFLG sy-vline 
WA_WCSHEADER_STR-TGFLG sy-vline 
WA_WCSHEADER_STR-REQUALFLG sy-vline 
WA_WCSHEADER_STR-CATFLG1 sy-vline 
WA_WCSHEADER_STR-CATFLG2 sy-vline 
WA_WCSHEADER_STR-DATEFR sy-vline 
WA_WCSHEADER_STR-TIMEFR sy-vline 
WA_WCSHEADER_STR-DATETO sy-vline 
WA_WCSHEADER_STR-TIMETO sy-vline 
WA_WCSHEADER_STR-EXTPERIOD sy-vline 
WA_WCSHEADER_STR-ANLZU sy-vline 
WA_WCSHEADER_STR-ANLZUX sy-vline 
WA_WCSHEADER_STR-RCTIME sy-vline 
WA_WCSHEADER_STR-RCUNIT sy-vline 
WA_WCSHEADER_STR-PRIOK sy-vline 
WA_WCSHEADER_STR-PRIOKX sy-vline 
WA_WCSHEADER_STR-ETAPE sy-vline 
WA_WCSHEADER_STR-ETAPEX sy-vline 
WA_WCSHEADER_STR-DOCFLG sy-vline 
WA_WCSHEADER_STR-PARFLG sy-vline 
WA_WCSHEADER_STR-REFKEY sy-vline 
WA_WCSHEADER_STR-REFTXT sy-vline 
WA_WCSHEADER_STR-REFOBJ sy-vline 
WA_WCSHEADER_STR-REFART sy-vline 
WA_WCSHEADER_STR-REFTYP sy-vline 
WA_WCSHEADER_STR-PB_TEXT sy-vline 
WA_WCSHEADER_STR-REMARKFLG1 sy-vline 
WA_WCSHEADER_STR-REMARKFLG2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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