ABAP Select data from SAP table PWCCAPCALC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PWCCAPCALC
*  INTO TABLE @DATA(IT_PWCCAPCALC2).
*--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_PWCCAPCALC INDEX 1 INTO DATA(WA_PWCCAPCALC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PWCCAPCALC>-MANDT = 1.
<PWCCAPCALC>-CAPACITYINTERNALID = 1.
<PWCCAPCALC>-VALIDITYSTARTDATE = 1.
<PWCCAPCALC>-VALIDITYENDDATE = 1.
<PWCCAPCALC>-CAPACITY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PWCCAPCALC-CAPACITYCATEGORYCODE, sy-vline,
  WA_PWCCAPCALC-CAPACITYACTIVEVERSION, sy-vline,
  WA_PWCCAPCALC-CAPACITYISFINITE, sy-vline,
  WA_PWCCAPCALC-CAPACITYISPOOLED, sy-vline,
  WA_PWCCAPCALC-CAPACITYHASINDIVCAPACITIES, sy-vline,
  WA_PWCCAPCALC-CAPACITYISEXCLDFRMLONGTERMPLNG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PWCCAPCALC 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_PWCCAPCALC 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_PWCCAPCALC INTO WA_PWCCAPCALC.


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

*Conversion exit CUNIT, internal->external for field CAPACITYBASEQTYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PWCCAPCALC-CAPACITYBASEQTYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PWCCAPCALC-CAPACITYBASEQTYUNIT.
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_PWCCAPCALC_STR, 
MANDT TYPE STRING,
CAPACITYINTERNALID TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
CAPACITY TYPE STRING,
CAPACITYCATEGORYCODE TYPE STRING,
CAPACITYACTIVEVERSION TYPE STRING,
CAPACITYISFINITE TYPE STRING,
CAPACITYISPOOLED TYPE STRING,
CAPACITYHASINDIVCAPACITIES TYPE STRING,
CAPACITYISEXCLDFRMLONGTERMPLNG TYPE STRING,
CAPACITYNUMBEROFCAPACITIES TYPE STRING,
CAPACITYRESPONSIBLEPLANNER TYPE STRING,
CAPACITYPLANUTILIZATIONPERCENT TYPE STRING,
CAPACITYBREAKDURATION TYPE STRING,
CAPISUSEDINMULTIOPERATIONS TYPE STRING,
REFERENCEDCAPACITYINTERNALID TYPE STRING,
CAPOVERLOADTHRESHOLDINPERCENT TYPE STRING,
PLANT TYPE STRING,
FACTORYCALENDAR TYPE STRING,
AUTHORIZATIONGROUP TYPE STRING,
SHIFTGROUP TYPE STRING,
CAPACITYSTARTTIME TYPE STRING,
CAPACITYENDTIME TYPE STRING,
CAPACITYQUANTITYUNIT TYPE STRING,
CAPACITYBASEQTYUNIT TYPE STRING,
CAPACITYLASTCHANGEDATETIME TYPE STRING,
OPERATINGDURATIONWITHOUTBREAK TYPE STRING,
OVERALLCAPACITY TYPE STRING,
SINGLECAPACITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PWCCAPCALC_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_PWCCAPCALC_STR-MANDT sy-vline 
WA_PWCCAPCALC_STR-CAPACITYINTERNALID sy-vline 
WA_PWCCAPCALC_STR-VALIDITYSTARTDATE sy-vline 
WA_PWCCAPCALC_STR-VALIDITYENDDATE sy-vline 
WA_PWCCAPCALC_STR-CAPACITY sy-vline 
WA_PWCCAPCALC_STR-CAPACITYCATEGORYCODE sy-vline 
WA_PWCCAPCALC_STR-CAPACITYACTIVEVERSION sy-vline 
WA_PWCCAPCALC_STR-CAPACITYISFINITE sy-vline 
WA_PWCCAPCALC_STR-CAPACITYISPOOLED sy-vline 
WA_PWCCAPCALC_STR-CAPACITYHASINDIVCAPACITIES sy-vline 
WA_PWCCAPCALC_STR-CAPACITYISEXCLDFRMLONGTERMPLNG sy-vline 
WA_PWCCAPCALC_STR-CAPACITYNUMBEROFCAPACITIES sy-vline 
WA_PWCCAPCALC_STR-CAPACITYRESPONSIBLEPLANNER sy-vline 
WA_PWCCAPCALC_STR-CAPACITYPLANUTILIZATIONPERCENT sy-vline 
WA_PWCCAPCALC_STR-CAPACITYBREAKDURATION sy-vline 
WA_PWCCAPCALC_STR-CAPISUSEDINMULTIOPERATIONS sy-vline 
WA_PWCCAPCALC_STR-REFERENCEDCAPACITYINTERNALID sy-vline 
WA_PWCCAPCALC_STR-CAPOVERLOADTHRESHOLDINPERCENT sy-vline 
WA_PWCCAPCALC_STR-PLANT sy-vline 
WA_PWCCAPCALC_STR-FACTORYCALENDAR sy-vline 
WA_PWCCAPCALC_STR-AUTHORIZATIONGROUP sy-vline 
WA_PWCCAPCALC_STR-SHIFTGROUP sy-vline 
WA_PWCCAPCALC_STR-CAPACITYSTARTTIME sy-vline 
WA_PWCCAPCALC_STR-CAPACITYENDTIME sy-vline 
WA_PWCCAPCALC_STR-CAPACITYQUANTITYUNIT sy-vline 
WA_PWCCAPCALC_STR-CAPACITYBASEQTYUNIT sy-vline 
WA_PWCCAPCALC_STR-CAPACITYLASTCHANGEDATETIME sy-vline 
WA_PWCCAPCALC_STR-OPERATINGDURATIONWITHOUTBREAK sy-vline 
WA_PWCCAPCALC_STR-OVERALLCAPACITY sy-vline 
WA_PWCCAPCALC_STR-SINGLECAPACITY sy-vline      INTO ld_text SEPARATED BY SPACE.

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