ABAP Select data from SAP table T52OCMP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T52OCMP 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 T52OCMP. 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 T52OCMP 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_T52OCMP TYPE STANDARD TABLE OF T52OCMP,
      WA_T52OCMP TYPE T52OCMP,
      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: <T52OCMP> TYPE T52OCMP.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T52OCMP.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T52OCMP
  INTO TABLE IT_T52OCMP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T52OCMP
*  INTO TABLE @DATA(IT_T52OCMP2).
*--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_T52OCMP INDEX 1 INTO DATA(WA_T52OCMP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T52OCMP ASSIGNING <T52OCMP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T52OCMP>-MANDT = 1.
<T52OCMP>-OCAPPL = 1.
<T52OCMP>-MOLGA = 1.
<T52OCMP>-BONDT = 1.
<T52OCMP>-OCRSN = 1.

ENDLOOP.

LOOP AT IT_T52OCMP INTO WA_T52OCMP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T52OCMP-PAYID, sy-vline,
  WA_T52OCMP-ABKRS, sy-vline,
  WA_T52OCMP-LFDNR, sy-vline,
  WA_T52OCMP-INDAT, sy-vline,
  WA_T52OCMP-INTIM, sy-vline,
  WA_T52OCMP-INUSR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T52OCMP 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_T52OCMP 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_T52OCMP INTO WA_T52OCMP.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_T52OCMP_STR, 
MANDT TYPE STRING,
OCAPPL TYPE STRING,
MOLGA TYPE STRING,
BONDT TYPE STRING,
OCRSN TYPE STRING,
PAYID TYPE STRING,
ABKRS TYPE STRING,
LFDNR TYPE STRING,
INDAT TYPE STRING,
INTIM TYPE STRING,
INUSR TYPE STRING,
PRDAT TYPE STRING,
PRTIM TYPE STRING,
PRUSR TYPE STRING,
PROCID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T52OCMP_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_T52OCMP_STR-MANDT sy-vline 
WA_T52OCMP_STR-OCAPPL sy-vline 
WA_T52OCMP_STR-MOLGA sy-vline 
WA_T52OCMP_STR-BONDT sy-vline 
WA_T52OCMP_STR-OCRSN sy-vline 
WA_T52OCMP_STR-PAYID sy-vline 
WA_T52OCMP_STR-ABKRS sy-vline 
WA_T52OCMP_STR-LFDNR sy-vline 
WA_T52OCMP_STR-INDAT sy-vline 
WA_T52OCMP_STR-INTIM sy-vline 
WA_T52OCMP_STR-INUSR sy-vline 
WA_T52OCMP_STR-PRDAT sy-vline 
WA_T52OCMP_STR-PRTIM sy-vline 
WA_T52OCMP_STR-PRUSR sy-vline 
WA_T52OCMP_STR-PROCID sy-vline      INTO ld_text SEPARATED BY SPACE.

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