ABAP Select data from SAP table PCMO2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PCMO2 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 PCMO2. 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 PCMO2 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_PCMO2 TYPE STANDARD TABLE OF PCMO2,
      WA_PCMO2 TYPE PCMO2,
      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: <PCMO2> TYPE PCMO2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PCMO2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PCMO2
  INTO TABLE IT_PCMO2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PCMO2
*  INTO TABLE @DATA(IT_PCMO22).
*--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_PCMO2 INDEX 1 INTO DATA(WA_PCMO22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PCMO2 ASSIGNING <PCMO2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PCMO2>-MANDT = 1.
<PCMO2>-PCMNR = 1.
<PCMO2>-ZAEHL = 1.
<PCMO2>-DELKZ = 1.
<PCMO2>-DELNR = 1.

ENDLOOP.

LOOP AT IT_PCMO2 INTO WA_PCMO2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PCMO2-DELPS, sy-vline,
  WA_PCMO2-SOBKZ, sy-vline,
  WA_PCMO2-DAT00, sy-vline,
  WA_PCMO2-ERNAM, sy-vline,
  WA_PCMO2-ERDAT, sy-vline,
  WA_PCMO2-AENAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PCMO2 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_PCMO2 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_PCMO2 INTO WA_PCMO2.


*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 PCMNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PCMO2-PCMNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PCMO2-PCMNR.
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_PCMO2_STR, 
MANDT TYPE STRING,
PCMNR TYPE STRING,
ZAEHL TYPE STRING,
DELKZ TYPE STRING,
DELNR TYPE STRING,
DELPS TYPE STRING,
SOBKZ TYPE STRING,
DAT00 TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PCMO2_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_PCMO2_STR-MANDT sy-vline 
WA_PCMO2_STR-PCMNR sy-vline 
WA_PCMO2_STR-ZAEHL sy-vline 
WA_PCMO2_STR-DELKZ sy-vline 
WA_PCMO2_STR-DELNR sy-vline 
WA_PCMO2_STR-DELPS sy-vline 
WA_PCMO2_STR-SOBKZ sy-vline 
WA_PCMO2_STR-DAT00 sy-vline 
WA_PCMO2_STR-ERNAM sy-vline 
WA_PCMO2_STR-ERDAT sy-vline 
WA_PCMO2_STR-AENAM sy-vline 
WA_PCMO2_STR-AEDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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