ABAP Select data from SAP table PEKPO into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PEKPO 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 PEKPO. 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 PEKPO 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_PEKPO TYPE STANDARD TABLE OF PEKPO,
      WA_PEKPO TYPE PEKPO,
      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: <PEKPO> TYPE PEKPO.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PEKPO
*  INTO TABLE @DATA(IT_PEKPO2).
*--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_PEKPO INDEX 1 INTO DATA(WA_PEKPO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PEKPO>-EBELP = 1.
<PEKPO>-LPEIN = 1.
<PEKPO>-EINDT = 1.
<PEKPO>-UZEIT = 1.
<PEKPO>-WEMNG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PEKPO-MAHNZ, sy-vline,
  WA_PEKPO-LICHA, sy-vline,
  WA_PEKPO-XBLNR, sy-vline,
  WA_PEKPO-LWEMG, sy-vline,
  WA_PEKPO-BUDAT, sy-vline,
  WA_PEKPO-LFDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PEKPO 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_PEKPO 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_PEKPO INTO WA_PEKPO.


*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 RLBNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PEKPO-RLBNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PEKPO-RLBNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MSR_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PEKPO-MSR_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PEKPO-MSR_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MSR_FORW_VENDOR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PEKPO-MSR_FORW_VENDOR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PEKPO-MSR_FORW_VENDOR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MSR_FWV_ADDRNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PEKPO-MSR_FWV_ADDRNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PEKPO-MSR_FWV_ADDRNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MSR_FWV_CITY_CODE2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PEKPO-MSR_FWV_CITY_CODE2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PEKPO-MSR_FWV_CITY_CODE2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field MSR_FWV_LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_PEKPO-MSR_FWV_LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PEKPO-MSR_FWV_LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PERSNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PEKPO-PERSNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PEKPO-PERSNUMBER.
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_PEKPO_STR, 
EBELP TYPE STRING,
LPEIN TYPE STRING,
EINDT TYPE STRING,
UZEIT TYPE STRING,
WEMNG TYPE STRING,
MAHNZ TYPE STRING,
LICHA TYPE STRING,
XBLNR TYPE STRING,
LWEMG TYPE STRING,
BUDAT TYPE STRING,
LFDAT TYPE STRING,
TPRIN TYPE STRING,
RLDAT TYPE STRING,
RLBNR TYPE STRING,
RLMNG TYPE STRING,
WEMPF TYPE STRING,
ABLAD TYPE STRING,
BSMNG TYPE STRING,
MSR_ID TYPE STRING,
MSR_ITEM TYPE STRING,
MSR_RET_REASON TYPE STRING,
MSR_RET_REASON_TEXT TYPE STRING,
MSR_FORW_VENDOR TYPE STRING,
MSR_FWV_TITLE TYPE STRING,
MSR_FWV_ADDRNUM TYPE STRING,
MSR_FWV_NAME1 TYPE STRING,
MSR_FWV_NAME2 TYPE STRING,
MSR_FWV_NAME3 TYPE STRING,
MSR_FWV_NAME4 TYPE STRING,
MSR_FWV_STREET TYPE STRING,
MSR_FWV_PO_BOX TYPE STRING,
MSR_FWV_PO_BOX_LOC TYPE STRING,
MSR_FWV_CITY_CODE2 TYPE STRING,
MSR_FWV_COUNTRY TYPE STRING,
MSR_FWV_LANGU TYPE STRING,
MSR_FWV_POST_CODE1 TYPE STRING,
MSR_FWV_CITY1 TYPE STRING,
MSR_FWV_CITY2 TYPE STRING,
MSR_FWV_REGION TYPE STRING,
RMA_VENDOR TYPE STRING,
MSR_FORW_PLANT1 TYPE STRING,
MSR_PLANT1_TXT TYPE STRING,
MSR_FORW_PLANT2 TYPE STRING,
MSR_PLANT2_TXT TYPE STRING,
MSR_FORW_PLANT3 TYPE STRING,
MSR_PLANT3_TXT TYPE STRING,
PERSNUMBER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PEKPO_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_PEKPO_STR-EBELP sy-vline 
WA_PEKPO_STR-LPEIN sy-vline 
WA_PEKPO_STR-EINDT sy-vline 
WA_PEKPO_STR-UZEIT sy-vline 
WA_PEKPO_STR-WEMNG sy-vline 
WA_PEKPO_STR-MAHNZ sy-vline 
WA_PEKPO_STR-LICHA sy-vline 
WA_PEKPO_STR-XBLNR sy-vline 
WA_PEKPO_STR-LWEMG sy-vline 
WA_PEKPO_STR-BUDAT sy-vline 
WA_PEKPO_STR-LFDAT sy-vline 
WA_PEKPO_STR-TPRIN sy-vline 
WA_PEKPO_STR-RLDAT sy-vline 
WA_PEKPO_STR-RLBNR sy-vline 
WA_PEKPO_STR-RLMNG sy-vline 
WA_PEKPO_STR-WEMPF sy-vline 
WA_PEKPO_STR-ABLAD sy-vline 
WA_PEKPO_STR-BSMNG sy-vline 
WA_PEKPO_STR-MSR_ID sy-vline 
WA_PEKPO_STR-MSR_ITEM sy-vline 
WA_PEKPO_STR-MSR_RET_REASON sy-vline 
WA_PEKPO_STR-MSR_RET_REASON_TEXT sy-vline 
WA_PEKPO_STR-MSR_FORW_VENDOR sy-vline 
WA_PEKPO_STR-MSR_FWV_TITLE sy-vline 
WA_PEKPO_STR-MSR_FWV_ADDRNUM sy-vline 
WA_PEKPO_STR-MSR_FWV_NAME1 sy-vline 
WA_PEKPO_STR-MSR_FWV_NAME2 sy-vline 
WA_PEKPO_STR-MSR_FWV_NAME3 sy-vline 
WA_PEKPO_STR-MSR_FWV_NAME4 sy-vline 
WA_PEKPO_STR-MSR_FWV_STREET sy-vline 
WA_PEKPO_STR-MSR_FWV_PO_BOX sy-vline 
WA_PEKPO_STR-MSR_FWV_PO_BOX_LOC sy-vline 
WA_PEKPO_STR-MSR_FWV_CITY_CODE2 sy-vline 
WA_PEKPO_STR-MSR_FWV_COUNTRY sy-vline 
WA_PEKPO_STR-MSR_FWV_LANGU sy-vline 
WA_PEKPO_STR-MSR_FWV_POST_CODE1 sy-vline 
WA_PEKPO_STR-MSR_FWV_CITY1 sy-vline 
WA_PEKPO_STR-MSR_FWV_CITY2 sy-vline 
WA_PEKPO_STR-MSR_FWV_REGION sy-vline 
WA_PEKPO_STR-RMA_VENDOR sy-vline 
WA_PEKPO_STR-MSR_FORW_PLANT1 sy-vline 
WA_PEKPO_STR-MSR_PLANT1_TXT sy-vline 
WA_PEKPO_STR-MSR_FORW_PLANT2 sy-vline 
WA_PEKPO_STR-MSR_PLANT2_TXT sy-vline 
WA_PEKPO_STR-MSR_FORW_PLANT3 sy-vline 
WA_PEKPO_STR-MSR_PLANT3_TXT sy-vline 
WA_PEKPO_STR-PERSNUMBER sy-vline      INTO ld_text SEPARATED BY SPACE.

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