ABAP Select data from SAP table IWCCAPBYAOR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IWCCAPBYAOR
*  INTO TABLE @DATA(IT_IWCCAPBYAOR2).
*--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_IWCCAPBYAOR INDEX 1 INTO DATA(WA_IWCCAPBYAOR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IWCCAPBYAOR>-MANDT = 1.
<IWCCAPBYAOR>-WORKCENTERINTERNALID = 1.
<IWCCAPBYAOR>-WORKCENTERTYPECODE = 1.
<IWCCAPBYAOR>-CAPACITYCATEGORYALLOCATION = 1.
<IWCCAPBYAOR>-CAPACITYINTERNALID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IWCCAPBYAOR-PLANT, sy-vline,
  WA_IWCCAPBYAOR-WORKCENTER, sy-vline,
  WA_IWCCAPBYAOR-CAPACITYCATEGORYCODE, sy-vline,
  WA_IWCCAPBYAOR-CAPACITY, sy-vline,
  WA_IWCCAPBYAOR-CAPACITYACTIVEVERSION, sy-vline,
  WA_IWCCAPBYAOR-WORKCENTERRESPONSIBLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IWCCAPBYAOR 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_IWCCAPBYAOR 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_IWCCAPBYAOR INTO WA_IWCCAPBYAOR.


*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_IWCCAPBYAOR_STR, 
MANDT TYPE STRING,
WORKCENTERINTERNALID TYPE STRING,
WORKCENTERTYPECODE TYPE STRING,
CAPACITYCATEGORYALLOCATION TYPE STRING,
CAPACITYINTERNALID TYPE STRING,
PLANT TYPE STRING,
WORKCENTER TYPE STRING,
CAPACITYCATEGORYCODE TYPE STRING,
CAPACITY TYPE STRING,
CAPACITYACTIVEVERSION TYPE STRING,
WORKCENTERRESPONSIBLE TYPE STRING,
CAPACITYRESPONSIBLEPLANNER TYPE STRING,
WORKCENTERDESC TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
CAPACITYLASTCHANGEDATETIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IWCCAPBYAOR_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_IWCCAPBYAOR_STR-MANDT sy-vline 
WA_IWCCAPBYAOR_STR-WORKCENTERINTERNALID sy-vline 
WA_IWCCAPBYAOR_STR-WORKCENTERTYPECODE sy-vline 
WA_IWCCAPBYAOR_STR-CAPACITYCATEGORYALLOCATION sy-vline 
WA_IWCCAPBYAOR_STR-CAPACITYINTERNALID sy-vline 
WA_IWCCAPBYAOR_STR-PLANT sy-vline 
WA_IWCCAPBYAOR_STR-WORKCENTER sy-vline 
WA_IWCCAPBYAOR_STR-CAPACITYCATEGORYCODE sy-vline 
WA_IWCCAPBYAOR_STR-CAPACITY sy-vline 
WA_IWCCAPBYAOR_STR-CAPACITYACTIVEVERSION sy-vline 
WA_IWCCAPBYAOR_STR-WORKCENTERRESPONSIBLE sy-vline 
WA_IWCCAPBYAOR_STR-CAPACITYRESPONSIBLEPLANNER sy-vline 
WA_IWCCAPBYAOR_STR-WORKCENTERDESC sy-vline 
WA_IWCCAPBYAOR_STR-LASTCHANGEDATETIME sy-vline 
WA_IWCCAPBYAOR_STR-CAPACITYLASTCHANGEDATETIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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