ABAP Select data from SAP table WCSWCDOC into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WCSWCDOC
*  INTO TABLE @DATA(IT_WCSWCDOC2).
*--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_WCSWCDOC INDEX 1 INTO DATA(WA_WCSWCDOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WCSWCDOC>-WCTYP = 1.
<WCSWCDOC>-WCNR = 1.
<WCSWCDOC>-OBJNR = 1.
<WCSWCDOC>-WCUSE = 1.
<WCSWCDOC>-REFWC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WCSWCDOC-REFWAPI, sy-vline,
  WA_WCSWCDOC-REFWAP, sy-vline,
  WA_WCSWCDOC-REFORDER, sy-vline,
  WA_WCSWCDOC-SYSST, sy-vline,
  WA_WCSWCDOC-USRST, sy-vline,
  WA_WCSWCDOC-WCSTSMA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WCSWCDOC 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_WCSWCDOC 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_WCSWCDOC INTO WA_WCSWCDOC.


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

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

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

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

*Conversion exit ALPHA, internal->external for field REFORDER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCSWCDOC-REFORDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCSWCDOC-REFORDER.
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_WCSWCDOC_STR, 
WCTYP TYPE STRING,
WCNR TYPE STRING,
OBJNR TYPE STRING,
WCUSE TYPE STRING,
REFWC TYPE STRING,
REFWAPI TYPE STRING,
REFWAP TYPE STRING,
REFORDER TYPE STRING,
SYSST TYPE STRING,
USRST TYPE STRING,
WCSTSMA TYPE STRING,
WCITMSTSMA TYPE STRING,
RULES TYPE STRING,
WT_NO TYPE STRING,
WT_DESC TYPE STRING,
SHIFT_CHIEF TYPE STRING,
GUARDIAN TYPE STRING,
OPERATOR TYPE STRING,
ON_DUTY TYPE STRING,
START_DATE TYPE STRING,
START_TIME TYPE STRING,
END_DATE TYPE STRING,
END_TIME TYPE STRING,
APPROVE_DATE TYPE STRING,
APPROVE_TIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WCSWCDOC_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_WCSWCDOC_STR-WCTYP sy-vline 
WA_WCSWCDOC_STR-WCNR sy-vline 
WA_WCSWCDOC_STR-OBJNR sy-vline 
WA_WCSWCDOC_STR-WCUSE sy-vline 
WA_WCSWCDOC_STR-REFWC sy-vline 
WA_WCSWCDOC_STR-REFWAPI sy-vline 
WA_WCSWCDOC_STR-REFWAP sy-vline 
WA_WCSWCDOC_STR-REFORDER sy-vline 
WA_WCSWCDOC_STR-SYSST sy-vline 
WA_WCSWCDOC_STR-USRST sy-vline 
WA_WCSWCDOC_STR-WCSTSMA sy-vline 
WA_WCSWCDOC_STR-WCITMSTSMA sy-vline 
WA_WCSWCDOC_STR-RULES sy-vline 
WA_WCSWCDOC_STR-WT_NO sy-vline 
WA_WCSWCDOC_STR-WT_DESC sy-vline 
WA_WCSWCDOC_STR-SHIFT_CHIEF sy-vline 
WA_WCSWCDOC_STR-GUARDIAN sy-vline 
WA_WCSWCDOC_STR-OPERATOR sy-vline 
WA_WCSWCDOC_STR-ON_DUTY sy-vline 
WA_WCSWCDOC_STR-START_DATE sy-vline 
WA_WCSWCDOC_STR-START_TIME sy-vline 
WA_WCSWCDOC_STR-END_DATE sy-vline 
WA_WCSWCDOC_STR-END_TIME sy-vline 
WA_WCSWCDOC_STR-APPROVE_DATE sy-vline 
WA_WCSWCDOC_STR-APPROVE_TIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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