ABAP Select data from SAP table /OLC/PMCO_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_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_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_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_OP TYPE STANDARD TABLE OF /OLC/PMCO_OP,
      WA_/OLC/PMCO_OP TYPE /OLC/PMCO_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_OP> TYPE /OLC/PMCO_OP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /OLC/PMCO_OP
*  INTO TABLE @DATA(IT_/OLC/PMCO_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_OP INDEX 1 INTO DATA(WA_/OLC/PMCO_OP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</OLC/PMCO_OP>-MANDT = 1.
</OLC/PMCO_OP>-OBJNR = 1.
</OLC/PMCO_OP>-COCUR = 1.
</OLC/PMCO_OP>-BELTP = 1.
</OLC/PMCO_OP>-WRTTP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/OLC/PMCO_OP-GJAHR, sy-vline,
  WA_/OLC/PMCO_OP-ACPOS, sy-vline,
  WA_/OLC/PMCO_OP-VERSN, sy-vline,
  WA_/OLC/PMCO_OP-PERBL, sy-vline,
  WA_/OLC/PMCO_OP-VORGA, sy-vline,
  WA_/OLC/PMCO_OP-BEMOT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/OLC/PMCO_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_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_OP INTO WA_/OLC/PMCO_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 WRTTP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/OLC/PMCO_OP-WRTTP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/OLC/PMCO_OP-WRTTP.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field VERSN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/OLC/PMCO_OP-VERSN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/OLC/PMCO_OP-VERSN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABKAT, internal->external for field ABKAT
CALL FUNCTION 'CONVERSION_EXIT_ABKAT_OUTPUT'
  EXPORTING
    input =                      WA_/OLC/PMCO_OP-ABKAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/OLC/PMCO_OP-ABKAT.
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_OP_STR, 
MANDT TYPE STRING,
OBJNR TYPE STRING,
COCUR TYPE STRING,
BELTP TYPE STRING,
WRTTP TYPE STRING,
GJAHR TYPE STRING,
ACPOS TYPE STRING,
VERSN TYPE STRING,
PERBL TYPE STRING,
VORGA TYPE STRING,
BEMOT TYPE STRING,
ABKAT TYPE STRING,
WRT00 TYPE STRING,
WRT01 TYPE STRING,
WRT02 TYPE STRING,
WRT03 TYPE STRING,
WRT04 TYPE STRING,
WRT05 TYPE STRING,
WRT06 TYPE STRING,
WRT07 TYPE STRING,
WRT08 TYPE STRING,
WRT09 TYPE STRING,
WRT10 TYPE STRING,
WRT11 TYPE STRING,
WRT12 TYPE STRING,
WRT13 TYPE STRING,
WRT14 TYPE STRING,
WRT15 TYPE STRING,
WRT16 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/OLC/PMCO_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_OP_STR-MANDT sy-vline 
WA_/OLC/PMCO_OP_STR-OBJNR sy-vline 
WA_/OLC/PMCO_OP_STR-COCUR sy-vline 
WA_/OLC/PMCO_OP_STR-BELTP sy-vline 
WA_/OLC/PMCO_OP_STR-WRTTP sy-vline 
WA_/OLC/PMCO_OP_STR-GJAHR sy-vline 
WA_/OLC/PMCO_OP_STR-ACPOS sy-vline 
WA_/OLC/PMCO_OP_STR-VERSN sy-vline 
WA_/OLC/PMCO_OP_STR-PERBL sy-vline 
WA_/OLC/PMCO_OP_STR-VORGA sy-vline 
WA_/OLC/PMCO_OP_STR-BEMOT sy-vline 
WA_/OLC/PMCO_OP_STR-ABKAT sy-vline 
WA_/OLC/PMCO_OP_STR-WRT00 sy-vline 
WA_/OLC/PMCO_OP_STR-WRT01 sy-vline 
WA_/OLC/PMCO_OP_STR-WRT02 sy-vline 
WA_/OLC/PMCO_OP_STR-WRT03 sy-vline 
WA_/OLC/PMCO_OP_STR-WRT04 sy-vline 
WA_/OLC/PMCO_OP_STR-WRT05 sy-vline 
WA_/OLC/PMCO_OP_STR-WRT06 sy-vline 
WA_/OLC/PMCO_OP_STR-WRT07 sy-vline 
WA_/OLC/PMCO_OP_STR-WRT08 sy-vline 
WA_/OLC/PMCO_OP_STR-WRT09 sy-vline 
WA_/OLC/PMCO_OP_STR-WRT10 sy-vline 
WA_/OLC/PMCO_OP_STR-WRT11 sy-vline 
WA_/OLC/PMCO_OP_STR-WRT12 sy-vline 
WA_/OLC/PMCO_OP_STR-WRT13 sy-vline 
WA_/OLC/PMCO_OP_STR-WRT14 sy-vline 
WA_/OLC/PMCO_OP_STR-WRT15 sy-vline 
WA_/OLC/PMCO_OP_STR-WRT16 sy-vline      INTO ld_text SEPARATED BY SPACE.

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