ABAP Select data from SAP table IWCAVAILCAPTP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IWCAVAILCAPTP
*  INTO TABLE @DATA(IT_IWCAVAILCAPTP2).
*--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_IWCAVAILCAPTP INDEX 1 INTO DATA(WA_IWCAVAILCAPTP2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IWCAVAILCAPTP-CALENDARDATE, sy-vline,
  WA_IWCAVAILCAPTP-VALIDITYENDDATE, sy-vline,
  WA_IWCAVAILCAPTP-CAPACITYACTIVEVERSION, sy-vline,
  WA_IWCAVAILCAPTP-AVAILABLECAPACITYSHIFT, sy-vline,
  WA_IWCAVAILCAPTP-WEEKDAY, sy-vline,
  WA_IWCAVAILCAPTP-SHIFTSTARTDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IWCAVAILCAPTP 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_IWCAVAILCAPTP 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_IWCAVAILCAPTP INTO WA_IWCAVAILCAPTP.


*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 WORKCENTERCAPACITYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IWCAVAILCAPTP-WORKCENTERCAPACITYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IWCAVAILCAPTP-WORKCENTERCAPACITYUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field WORKCENTERUTILIZATIONUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IWCAVAILCAPTP-WORKCENTERUTILIZATIONUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IWCAVAILCAPTP-WORKCENTERUTILIZATIONUNIT.
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_IWCAVAILCAPTP_STR, 
MANDT TYPE STRING,
WORKCENTERINTERNALID TYPE STRING,
WORKCENTERTYPECODE TYPE STRING,
CAPACITYCATEGORYALLOCATION TYPE STRING,
CAPACITYINTERNALID TYPE STRING,
CALENDARDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
CAPACITYACTIVEVERSION TYPE STRING,
AVAILABLECAPACITYSHIFT TYPE STRING,
WEEKDAY TYPE STRING,
SHIFTSTARTDATE TYPE STRING,
SHIFTSTARTTIME TYPE STRING,
SHIFTENDDATE TYPE STRING,
SHIFTENDTIME TYPE STRING,
CALENDARMONTH TYPE STRING,
CALENDARYEAR TYPE STRING,
CALENDARWEEK TYPE STRING,
WORKDAYS TYPE STRING,
SHIFTNAME TYPE STRING,
SHIFTDEFINITION TYPE STRING,
SHIFTDEFINITIONNAME TYPE STRING,
SHIFTGROUPING TYPE STRING,
WORKDAYRULE TYPE STRING,
FACTORYCALENDAR TYPE STRING,
CAPACITYSTARTTIME TYPE STRING,
CAPACITYENDTIME TYPE STRING,
CAPACITYBREAKDURATION TYPE STRING,
WORKCENTERCAPACITYUNIT TYPE STRING,
CAPACITYNUMBEROFCAPACITIES TYPE STRING,
WORKCENTERUTILIZATIONUNIT TYPE STRING,
CAPACITYPLANUTILIZATIONPERCENT TYPE STRING,
VALIDITYBEGINDATE TYPE STRING,
SHIFTSTATUSTEXT TYPE STRING,
SHIFTSTATUSCODE TYPE STRING,
TOTOPERATINGDURATIONINHOURS TYPE STRING,
OPERATINGCAPACITYDURATIONINHRS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IWCAVAILCAPTP_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_IWCAVAILCAPTP_STR-MANDT sy-vline 
WA_IWCAVAILCAPTP_STR-WORKCENTERINTERNALID sy-vline 
WA_IWCAVAILCAPTP_STR-WORKCENTERTYPECODE sy-vline 
WA_IWCAVAILCAPTP_STR-CAPACITYCATEGORYALLOCATION sy-vline 
WA_IWCAVAILCAPTP_STR-CAPACITYINTERNALID sy-vline 
WA_IWCAVAILCAPTP_STR-CALENDARDATE sy-vline 
WA_IWCAVAILCAPTP_STR-VALIDITYENDDATE sy-vline 
WA_IWCAVAILCAPTP_STR-CAPACITYACTIVEVERSION sy-vline 
WA_IWCAVAILCAPTP_STR-AVAILABLECAPACITYSHIFT sy-vline 
WA_IWCAVAILCAPTP_STR-WEEKDAY sy-vline 
WA_IWCAVAILCAPTP_STR-SHIFTSTARTDATE sy-vline 
WA_IWCAVAILCAPTP_STR-SHIFTSTARTTIME sy-vline 
WA_IWCAVAILCAPTP_STR-SHIFTENDDATE sy-vline 
WA_IWCAVAILCAPTP_STR-SHIFTENDTIME sy-vline 
WA_IWCAVAILCAPTP_STR-CALENDARMONTH sy-vline 
WA_IWCAVAILCAPTP_STR-CALENDARYEAR sy-vline 
WA_IWCAVAILCAPTP_STR-CALENDARWEEK sy-vline 
WA_IWCAVAILCAPTP_STR-WORKDAYS sy-vline 
WA_IWCAVAILCAPTP_STR-SHIFTNAME sy-vline 
WA_IWCAVAILCAPTP_STR-SHIFTDEFINITION sy-vline 
WA_IWCAVAILCAPTP_STR-SHIFTDEFINITIONNAME sy-vline 
WA_IWCAVAILCAPTP_STR-SHIFTGROUPING sy-vline 
WA_IWCAVAILCAPTP_STR-WORKDAYRULE sy-vline 
WA_IWCAVAILCAPTP_STR-FACTORYCALENDAR sy-vline 
WA_IWCAVAILCAPTP_STR-CAPACITYSTARTTIME sy-vline 
WA_IWCAVAILCAPTP_STR-CAPACITYENDTIME sy-vline 
WA_IWCAVAILCAPTP_STR-CAPACITYBREAKDURATION sy-vline 
WA_IWCAVAILCAPTP_STR-WORKCENTERCAPACITYUNIT sy-vline 
WA_IWCAVAILCAPTP_STR-CAPACITYNUMBEROFCAPACITIES sy-vline 
WA_IWCAVAILCAPTP_STR-WORKCENTERUTILIZATIONUNIT sy-vline 
WA_IWCAVAILCAPTP_STR-CAPACITYPLANUTILIZATIONPERCENT sy-vline 
WA_IWCAVAILCAPTP_STR-VALIDITYBEGINDATE sy-vline 
WA_IWCAVAILCAPTP_STR-SHIFTSTATUSTEXT sy-vline 
WA_IWCAVAILCAPTP_STR-SHIFTSTATUSCODE sy-vline 
WA_IWCAVAILCAPTP_STR-TOTOPERATINGDURATIONINHOURS sy-vline 
WA_IWCAVAILCAPTP_STR-OPERATINGCAPACITYDURATIONINHRS sy-vline      INTO ld_text SEPARATED BY SPACE.

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