ABAP Select data from SAP table T52OCG into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T52OCG 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 T52OCG. 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 T52OCG 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_T52OCG TYPE STANDARD TABLE OF T52OCG,
      WA_T52OCG TYPE T52OCG,
      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: <T52OCG> TYPE T52OCG.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T52OCG.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T52OCG
  INTO TABLE IT_T52OCG.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T52OCG
*  INTO TABLE @DATA(IT_T52OCG2).
*--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_T52OCG INDEX 1 INTO DATA(WA_T52OCG2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T52OCG ASSIGNING <T52OCG>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T52OCG>-MANDT = 1.
<T52OCG>-PRCTY = 1.
<T52OCG>-PERNR = 1.
<T52OCG>-LFDNR = 1.
<T52OCG>-ABKRS = 1.

ENDLOOP.

LOOP AT IT_T52OCG INTO WA_T52OCG.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T52OCG-SEQNR, sy-vline,
  WA_T52OCG-PAYTY, sy-vline,
  WA_T52OCG-PAYID, sy-vline,
  WA_T52OCG-BONDT, sy-vline,
  WA_T52OCG-OCRSN, sy-vline,
  WA_T52OCG-PABRJ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T52OCG 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_T52OCG 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_T52OCG INTO WA_T52OCG.


*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 GJAHR, internal->external for field PABRJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_T52OCG-PABRJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T52OCG-PABRJ.
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_T52OCG_STR, 
MANDT TYPE STRING,
PRCTY TYPE STRING,
PERNR TYPE STRING,
LFDNR TYPE STRING,
ABKRS TYPE STRING,
SEQNR TYPE STRING,
PAYTY TYPE STRING,
PAYID TYPE STRING,
BONDT TYPE STRING,
OCRSN TYPE STRING,
PABRJ TYPE STRING,
PABRP TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,
INDAT TYPE STRING,
INTIM TYPE STRING,
INUSR TYPE STRING,
PRDAT TYPE STRING,
PRTIM TYPE STRING,
PRUSR TYPE STRING,
PROCID TYPE STRING,
POSTI TYPE STRING,
MOLGA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T52OCG_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_T52OCG_STR-MANDT sy-vline 
WA_T52OCG_STR-PRCTY sy-vline 
WA_T52OCG_STR-PERNR sy-vline 
WA_T52OCG_STR-LFDNR sy-vline 
WA_T52OCG_STR-ABKRS sy-vline 
WA_T52OCG_STR-SEQNR sy-vline 
WA_T52OCG_STR-PAYTY sy-vline 
WA_T52OCG_STR-PAYID sy-vline 
WA_T52OCG_STR-BONDT sy-vline 
WA_T52OCG_STR-OCRSN sy-vline 
WA_T52OCG_STR-PABRJ sy-vline 
WA_T52OCG_STR-PABRP sy-vline 
WA_T52OCG_STR-LAUFD sy-vline 
WA_T52OCG_STR-LAUFI sy-vline 
WA_T52OCG_STR-INDAT sy-vline 
WA_T52OCG_STR-INTIM sy-vline 
WA_T52OCG_STR-INUSR sy-vline 
WA_T52OCG_STR-PRDAT sy-vline 
WA_T52OCG_STR-PRTIM sy-vline 
WA_T52OCG_STR-PRUSR sy-vline 
WA_T52OCG_STR-PROCID sy-vline 
WA_T52OCG_STR-POSTI sy-vline 
WA_T52OCG_STR-MOLGA sy-vline      INTO ld_text SEPARATED BY SPACE.

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