ABAP Select data from SAP table /OLC/PMCO_KGR_OP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /OLC/PMCO_KGR_OP 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 /OLC/PMCO_KGR_OP. 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 /OLC/PMCO_KGR_OP 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_/OLC/PMCO_KGR_OP TYPE STANDARD TABLE OF /OLC/PMCO_KGR_OP,
      WA_/OLC/PMCO_KGR_OP TYPE /OLC/PMCO_KGR_OP,
      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: </OLC/PMCO_KGR_OP> TYPE /OLC/PMCO_KGR_OP.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /OLC/PMCO_KGR_OP
  INTO TABLE IT_/OLC/PMCO_KGR_OP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /OLC/PMCO_KGR_OP
*  INTO TABLE @DATA(IT_/OLC/PMCO_KGR_OP2).
*--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_/OLC/PMCO_KGR_OP INDEX 1 INTO DATA(WA_/OLC/PMCO_KGR_OP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/OLC/PMCO_KGR_OP ASSIGNING </OLC/PMCO_KGR_OP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</OLC/PMCO_KGR_OP>-AUFNR = 1.
</OLC/PMCO_KGR_OP>-VORNR = 1.
</OLC/PMCO_KGR_OP>-UVORN = 1.
</OLC/PMCO_KGR_OP>-BELTP = 1.
</OLC/PMCO_KGR_OP>-ACPOS = 1.

ENDLOOP.

LOOP AT IT_/OLC/PMCO_KGR_OP INTO WA_/OLC/PMCO_KGR_OP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/OLC/PMCO_KGR_OP-BEMOT, sy-vline,
  WA_/OLC/PMCO_KGR_OP-VORGA, sy-vline,
  WA_/OLC/PMCO_KGR_OP-IKOSTENKGR, sy-vline,
  WA_/OLC/PMCO_KGR_OP-PKOSTENKGR, sy-vline,
  WA_/OLC/PMCO_KGR_OP-SKOSTENKGR, sy-vline,
  WA_/OLC/PMCO_KGR_OP-IERTRAGKGR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/OLC/PMCO_KGR_OP 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_/OLC/PMCO_KGR_OP 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_/OLC/PMCO_KGR_OP INTO WA_/OLC/PMCO_KGR_OP.


*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 AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/OLC/PMCO_KGR_OP-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/OLC/PMCO_KGR_OP-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_/OLC/PMCO_KGR_OP-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/OLC/PMCO_KGR_OP-VORNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field UVORN
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_/OLC/PMCO_KGR_OP-UVORN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/OLC/PMCO_KGR_OP-UVORN.
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_/OLC/PMCO_KGR_OP_STR, 
AUFNR TYPE STRING,
VORNR TYPE STRING,
UVORN TYPE STRING,
BELTP TYPE STRING,
ACPOS TYPE STRING,
BEMOT TYPE STRING,
VORGA TYPE STRING,
IKOSTENKGR TYPE STRING,
PKOSTENKGR TYPE STRING,
SKOSTENKGR TYPE STRING,
IERTRAGKGR TYPE STRING,
PERTRAGKGR TYPE STRING,
SERTRAGKGR TYPE STRING,
IGESAMTKGR TYPE STRING,
PGESAMTKGR TYPE STRING,
SGESAMTKGR TYPE STRING,
WAERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/OLC/PMCO_KGR_OP_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_/OLC/PMCO_KGR_OP_STR-AUFNR sy-vline 
WA_/OLC/PMCO_KGR_OP_STR-VORNR sy-vline 
WA_/OLC/PMCO_KGR_OP_STR-UVORN sy-vline 
WA_/OLC/PMCO_KGR_OP_STR-BELTP sy-vline 
WA_/OLC/PMCO_KGR_OP_STR-ACPOS sy-vline 
WA_/OLC/PMCO_KGR_OP_STR-BEMOT sy-vline 
WA_/OLC/PMCO_KGR_OP_STR-VORGA sy-vline 
WA_/OLC/PMCO_KGR_OP_STR-IKOSTENKGR sy-vline 
WA_/OLC/PMCO_KGR_OP_STR-PKOSTENKGR sy-vline 
WA_/OLC/PMCO_KGR_OP_STR-SKOSTENKGR sy-vline 
WA_/OLC/PMCO_KGR_OP_STR-IERTRAGKGR sy-vline 
WA_/OLC/PMCO_KGR_OP_STR-PERTRAGKGR sy-vline 
WA_/OLC/PMCO_KGR_OP_STR-SERTRAGKGR sy-vline 
WA_/OLC/PMCO_KGR_OP_STR-IGESAMTKGR sy-vline 
WA_/OLC/PMCO_KGR_OP_STR-PGESAMTKGR sy-vline 
WA_/OLC/PMCO_KGR_OP_STR-SGESAMTKGR sy-vline 
WA_/OLC/PMCO_KGR_OP_STR-WAERS sy-vline      INTO ld_text SEPARATED BY SPACE.

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