ABAP Select data from SAP table /SAPAPO/RRP_GM_PEG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/RRP_GM_PEG
*  INTO TABLE @DATA(IT_/SAPAPO/RRP_GM_PEG2).
*--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_/SAPAPO/RRP_GM_PEG INDEX 1 INTO DATA(WA_/SAPAPO/RRP_GM_PEG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/RRP_GM_PEG>-MANDT = 1.
</SAPAPO/RRP_GM_PEG>-LOGSRCSYS = 1.
</SAPAPO/RRP_GM_PEG>-UNAME = 1.
</SAPAPO/RRP_GM_PEG>-TID = 1.
</SAPAPO/RRP_GM_PEG>-GEN_TSTAMP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/RRP_GM_PEG-CALLNR, sy-vline,
  WA_/SAPAPO/RRP_GM_PEG-FIXUPNR, sy-vline,
  WA_/SAPAPO/RRP_GM_PEG-GMUPOBJ, sy-vline,
  WA_/SAPAPO/RRP_GM_PEG-GMSTATUS, sy-vline,
  WA_/SAPAPO/RRP_GM_PEG-GMTYP, sy-vline,
  WA_/SAPAPO/RRP_GM_PEG-OBJECT_TYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/RRP_GM_PEG 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_/SAPAPO/RRP_GM_PEG 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_/SAPAPO/RRP_GM_PEG INTO WA_/SAPAPO/RRP_GM_PEG.


*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 LOGSRCSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/RRP_GM_PEG-LOGSRCSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/RRP_GM_PEG-LOGSRCSYS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit VRSIO, internal->external for field SIMID
CALL FUNCTION 'CONVERSION_EXIT_VRSIO_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/RRP_GM_PEG-SIMID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/RRP_GM_PEG-SIMID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/RRP_GM_PEG-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/RRP_GM_PEG-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/RRP_GM_PEG-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/RRP_GM_PEG-MEINS.
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_/SAPAPO/RRP_GM_PEG_STR, 
MANDT TYPE STRING,
LOGSRCSYS TYPE STRING,
UNAME TYPE STRING,
TID TYPE STRING,
GEN_TSTAMP TYPE STRING,
CALLNR TYPE STRING,
FIXUPNR TYPE STRING,
GMUPOBJ TYPE STRING,
GMSTATUS TYPE STRING,
GMTYP TYPE STRING,
OBJECT_TYPE TYPE STRING,
CIF_METHOD TYPE STRING,
LOGQS TYPE STRING,
MODEL TYPE STRING,
SIMID TYPE STRING,
DELNR TYPE STRING,
ORDERID TYPE STRING,
POSITION_NO TYPE STRING,
LINE_NO TYPE STRING,
MATNR TYPE STRING,
MATID TYPE STRING,
LOCID TYPE STRING,
LOCTYPE TYPE STRING,
SUBLOC TYPE STRING,
PEGID TYPE STRING,
CATEGORY TYPE STRING,
STOCKTYPE TYPE STRING,
BATCH TYPE STRING,
SOBKZ TYPE STRING,
SSKEY TYPE STRING,
CUOBJ TYPE STRING,
MEINS TYPE STRING,
ORDER_QTY TYPE STRING,
SCRAP_QTY TYPE STRING,
GM_QTY TYPE STRING,
STOCK_QTY TYPE STRING,
DELTA_QTY TYPE STRING,
P_METHOD TYPE STRING,
P_FROM_ORDERID TYPE STRING,
P_FROM_POSITION_NO TYPE STRING,
P_FROM_LINE_NO TYPE STRING,
P_TO_ORDERID TYPE STRING,
P_TO_POSITION_NO TYPE STRING,
P_TO_LINE_NO TYPE STRING,
P_PEG_AMOUNT TYPE STRING,
P_PEG_DELTA_QTY TYPE STRING,
PEG_RC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/RRP_GM_PEG_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_/SAPAPO/RRP_GM_PEG_STR-MANDT sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-LOGSRCSYS sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-UNAME sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-TID sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-GEN_TSTAMP sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-CALLNR sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-FIXUPNR sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-GMUPOBJ sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-GMSTATUS sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-GMTYP sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-OBJECT_TYPE sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-CIF_METHOD sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-LOGQS sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-MODEL sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-SIMID sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-DELNR sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-ORDERID sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-POSITION_NO sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-LINE_NO sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-MATNR sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-MATID sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-LOCID sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-LOCTYPE sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-SUBLOC sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-PEGID sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-CATEGORY sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-STOCKTYPE sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-BATCH sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-SOBKZ sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-SSKEY sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-CUOBJ sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-MEINS sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-ORDER_QTY sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-SCRAP_QTY sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-GM_QTY sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-STOCK_QTY sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-DELTA_QTY sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-P_METHOD sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-P_FROM_ORDERID sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-P_FROM_POSITION_NO sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-P_FROM_LINE_NO sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-P_TO_ORDERID sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-P_TO_POSITION_NO sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-P_TO_LINE_NO sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-P_PEG_AMOUNT sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-P_PEG_DELTA_QTY sy-vline 
WA_/SAPAPO/RRP_GM_PEG_STR-PEG_RC sy-vline      INTO ld_text SEPARATED BY SPACE.

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