ABAP Select data from SAP table CEWMWOOVPQ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CEWMWOOVPQ
*  INTO TABLE @DATA(IT_CEWMWOOVPQ2).
*--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_CEWMWOOVPQ INDEX 1 INTO DATA(WA_CEWMWOOVPQ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CEWMWOOVPQ>-MANDT = 1.
<CEWMWOOVPQ>-WAREHOUSE = 1.
<CEWMWOOVPQ>-WAREHOUSEORDER = 1.
<CEWMWOOVPQ>-WAREHOUSENAME = 1.
<CEWMWOOVPQ>-WAREHOUSEORDERSTATUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CEWMWOOVPQ-WAREHOUSEORDERSTATUSNAME, sy-vline,
  WA_CEWMWOOVPQ-WHSEORDERCRTNWHSETMZNDATE, sy-vline,
  WA_CEWMWOOVPQ-WHSEORDLTSTSTRTWHSETMZNDATE, sy-vline,
  WA_CEWMWOOVPQ-WHSEORDERCONFWHSETMZNDATE, sy-vline,
  WA_CEWMWOOVPQ-WAREHOUSEORDERQUEUE, sy-vline,
  WA_CEWMWOOVPQ-WAREHOUSEORDERQUEUENAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CEWMWOOVPQ 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_CEWMWOOVPQ 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_CEWMWOOVPQ INTO WA_CEWMWOOVPQ.


*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 WAREHOUSEORDER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CEWMWOOVPQ-WAREHOUSEORDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CEWMWOOVPQ-WAREHOUSEORDER.
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_CEWMWOOVPQ_STR, 
MANDT TYPE STRING,
WAREHOUSE TYPE STRING,
WAREHOUSEORDER TYPE STRING,
WAREHOUSENAME TYPE STRING,
WAREHOUSEORDERSTATUS TYPE STRING,
WAREHOUSEORDERSTATUSNAME TYPE STRING,
WHSEORDERCRTNWHSETMZNDATE TYPE STRING,
WHSEORDLTSTSTRTWHSETMZNDATE TYPE STRING,
WHSEORDERCONFWHSETMZNDATE TYPE STRING,
WAREHOUSEORDERQUEUE TYPE STRING,
WAREHOUSEORDERQUEUENAME TYPE STRING,
ACTIVITYAREA TYPE STRING,
ACTIVITYAREANAME TYPE STRING,
NUMBEROFWAREHOUSEORDERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CEWMWOOVPQ_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_CEWMWOOVPQ_STR-MANDT sy-vline 
WA_CEWMWOOVPQ_STR-WAREHOUSE sy-vline 
WA_CEWMWOOVPQ_STR-WAREHOUSEORDER sy-vline 
WA_CEWMWOOVPQ_STR-WAREHOUSENAME sy-vline 
WA_CEWMWOOVPQ_STR-WAREHOUSEORDERSTATUS sy-vline 
WA_CEWMWOOVPQ_STR-WAREHOUSEORDERSTATUSNAME sy-vline 
WA_CEWMWOOVPQ_STR-WHSEORDERCRTNWHSETMZNDATE sy-vline 
WA_CEWMWOOVPQ_STR-WHSEORDLTSTSTRTWHSETMZNDATE sy-vline 
WA_CEWMWOOVPQ_STR-WHSEORDERCONFWHSETMZNDATE sy-vline 
WA_CEWMWOOVPQ_STR-WAREHOUSEORDERQUEUE sy-vline 
WA_CEWMWOOVPQ_STR-WAREHOUSEORDERQUEUENAME sy-vline 
WA_CEWMWOOVPQ_STR-ACTIVITYAREA sy-vline 
WA_CEWMWOOVPQ_STR-ACTIVITYAREANAME sy-vline 
WA_CEWMWOOVPQ_STR-NUMBEROFWAREHOUSEORDERS sy-vline      INTO ld_text SEPARATED BY SPACE.

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