ABAP Select data from SAP table /SAPAPO/RRP_PEGKEY_EXT_STR 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_PEGKEY_EXT_STR 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_PEGKEY_EXT_STR. 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_PEGKEY_EXT_STR 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_PEGKEY_EXT_STR TYPE STANDARD TABLE OF /SAPAPO/RRP_PEGKEY_EXT_STR,
      WA_/SAPAPO/RRP_PEGKEY_EXT_STR TYPE /SAPAPO/RRP_PEGKEY_EXT_STR,
      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_PEGKEY_EXT_STR> TYPE /SAPAPO/RRP_PEGKEY_EXT_STR.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/RRP_PEGKEY_EXT_STR
*  INTO TABLE @DATA(IT_/SAPAPO/RRP_PEGKEY_EXT_STR2).
*--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_PEGKEY_EXT_STR INDEX 1 INTO DATA(WA_/SAPAPO/RRP_PEGKEY_EXT_STR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/RRP_PEGKEY_EXT_STR>-PEGID = 1.
</SAPAPO/RRP_PEGKEY_EXT_STR>-SIMID = 1.
</SAPAPO/RRP_PEGKEY_EXT_STR>-ACCID = 1.
</SAPAPO/RRP_PEGKEY_EXT_STR>-PLSEC = 1.
</SAPAPO/RRP_PEGKEY_EXT_STR>-SCZID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/RRP_PEGKEY_EXT_STR-SSEXT, sy-vline,
  WA_/SAPAPO/RRP_PEGKEY_EXT_STR-MATID, sy-vline,
  WA_/SAPAPO/RRP_PEGKEY_EXT_STR-LOCID, sy-vline,
  WA_/SAPAPO/RRP_PEGKEY_EXT_STR-PLPPS, sy-vline,
  WA_/SAPAPO/RRP_PEGKEY_EXT_STR-MATNR, sy-vline,
  WA_/SAPAPO/RRP_PEGKEY_EXT_STR-MAKTX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/RRP_PEGKEY_EXT_STR 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_PEGKEY_EXT_STR 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_PEGKEY_EXT_STR INTO WA_/SAPAPO/RRP_PEGKEY_EXT_STR.


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

*Conversion exit CUNIT, internal->external for field MEOUT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/RRP_PEGKEY_EXT_STR-MEOUT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/RRP_PEGKEY_EXT_STR-MEOUT.
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_PEGKEY_EXT_STR_STR, 
PEGID TYPE STRING,
SIMID TYPE STRING,
ACCID TYPE STRING,
PLSEC TYPE STRING,
SCZID TYPE STRING,
SSEXT TYPE STRING,
MATID TYPE STRING,
LOCID TYPE STRING,
PLPPS TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
MEINS TYPE STRING,
MEOUT TYPE STRING,
LOCNO TYPE STRING,
RRP_TYPE TYPE STRING,
BESKZ TYPE STRING,
STRA1 TYPE STRING,
CLASS TYPE STRING,
MANOT TYPE STRING,
LSZID TYPE STRING,
CUOBJ TYPE STRING,
CONREF TYPE STRING,
KZKFG TYPE STRING,
WHATBOM TYPE STRING,
CHARS TYPE STRING,
LOCTYPE TYPE STRING,
DISST TYPE STRING,
SORTNO TYPE STRING,
PEGID_AUX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/RRP_PEGKEY_EXT_STR_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_PEGKEY_EXT_STR_STR-PEGID sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-SIMID sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-ACCID sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-PLSEC sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-SCZID sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-SSEXT sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-MATID sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-LOCID sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-PLPPS sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-MATNR sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-MAKTX sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-MEINS sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-MEOUT sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-LOCNO sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-RRP_TYPE sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-BESKZ sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-STRA1 sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-CLASS sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-MANOT sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-LSZID sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-CUOBJ sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-CONREF sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-KZKFG sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-WHATBOM sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-CHARS sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-LOCTYPE sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-DISST sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-SORTNO sy-vline 
WA_/SAPAPO/RRP_PEGKEY_EXT_STR_STR-PEGID_AUX sy-vline      INTO ld_text SEPARATED BY SPACE.

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