ABAP Select data from SAP table PEKES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PEKES
*  INTO TABLE @DATA(IT_PEKES2).
*--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_PEKES INDEX 1 INTO DATA(WA_PEKES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PEKES>-MANDT = 1.
<PEKES>-EBELN = 1.
<PEKES>-EBELP = 1.
<PEKES>-ETENS = 1.
<PEKES>-EBTYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PEKES-EINDT, sy-vline,
  WA_PEKES-LPEIN, sy-vline,
  WA_PEKES-UZEIT, sy-vline,
  WA_PEKES-ERDAT, sy-vline,
  WA_PEKES-EZEIT, sy-vline,
  WA_PEKES-MENGE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PEKES 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_PEKES 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_PEKES INTO WA_PEKES.


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

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

*Conversion exit MATN1, internal->external for field EMATN
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_PEKES-EMATN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PEKES-EMATN.
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_PEKES_STR, 
MANDT TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
ETENS TYPE STRING,
EBTYP TYPE STRING,
EINDT TYPE STRING,
LPEIN TYPE STRING,
UZEIT TYPE STRING,
ERDAT TYPE STRING,
EZEIT TYPE STRING,
MENGE TYPE STRING,
DABMG TYPE STRING,
ESTKZ TYPE STRING,
LOEKZ TYPE STRING,
KZDIS TYPE STRING,
XBLNR TYPE STRING,
VBELN TYPE STRING,
VBELP TYPE STRING,
MPROF TYPE STRING,
EMATN TYPE STRING,
MAHNZ TYPE STRING,
CHARG TYPE STRING,
UECHA TYPE STRING,
REF_ETENS TYPE STRING,
IMWRK TYPE STRING,
IDOC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PEKES_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_PEKES_STR-MANDT sy-vline 
WA_PEKES_STR-EBELN sy-vline 
WA_PEKES_STR-EBELP sy-vline 
WA_PEKES_STR-ETENS sy-vline 
WA_PEKES_STR-EBTYP sy-vline 
WA_PEKES_STR-EINDT sy-vline 
WA_PEKES_STR-LPEIN sy-vline 
WA_PEKES_STR-UZEIT sy-vline 
WA_PEKES_STR-ERDAT sy-vline 
WA_PEKES_STR-EZEIT sy-vline 
WA_PEKES_STR-MENGE sy-vline 
WA_PEKES_STR-DABMG sy-vline 
WA_PEKES_STR-ESTKZ sy-vline 
WA_PEKES_STR-LOEKZ sy-vline 
WA_PEKES_STR-KZDIS sy-vline 
WA_PEKES_STR-XBLNR sy-vline 
WA_PEKES_STR-VBELN sy-vline 
WA_PEKES_STR-VBELP sy-vline 
WA_PEKES_STR-MPROF sy-vline 
WA_PEKES_STR-EMATN sy-vline 
WA_PEKES_STR-MAHNZ sy-vline 
WA_PEKES_STR-CHARG sy-vline 
WA_PEKES_STR-UECHA sy-vline 
WA_PEKES_STR-REF_ETENS sy-vline 
WA_PEKES_STR-IMWRK sy-vline 
WA_PEKES_STR-IDOC sy-vline      INTO ld_text SEPARATED BY SPACE.

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