ABAP Select data from SAP table PEG_DIS_ADMIN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PEG_DIS_ADMIN
*  INTO TABLE @DATA(IT_PEG_DIS_ADMIN2).
*--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_PEG_DIS_ADMIN INDEX 1 INTO DATA(WA_PEG_DIS_ADMIN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PEG_DIS_ADMIN>-MANDT = 1.
<PEG_DIS_ADMIN>-LOGNUMBER = 1.
<PEG_DIS_ADMIN>-GRPNR = 1.
<PEG_DIS_ADMIN>-PEG_CPUDT = 1.
<PEG_DIS_ADMIN>-PEG_CPUTM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PEG_DIS_ADMIN-PEG_USNAM, sy-vline,
  WA_PEG_DIS_ADMIN-PEG_TCODE, sy-vline,
  WA_PEG_DIS_ADMIN-PEG_TIMESTMP, sy-vline,
  WA_PEG_DIS_ADMIN-TRPEG_FLAG, sy-vline,
  WA_PEG_DIS_ADMIN-TRPEG_CPUDT, sy-vline,
  WA_PEG_DIS_ADMIN-TRPEG_CPUTM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PEG_DIS_ADMIN 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_PEG_DIS_ADMIN 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_PEG_DIS_ADMIN INTO WA_PEG_DIS_ADMIN.


*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 ABPSP, internal->external for field GRPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_PEG_DIS_ADMIN-GRPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PEG_DIS_ADMIN-GRPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VERSI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PEG_DIS_ADMIN-VERSI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PEG_DIS_ADMIN-VERSI.
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_PEG_DIS_ADMIN_STR, 
MANDT TYPE STRING,
LOGNUMBER TYPE STRING,
GRPNR TYPE STRING,
PEG_CPUDT TYPE STRING,
PEG_CPUTM TYPE STRING,
PEG_USNAM TYPE STRING,
PEG_TCODE TYPE STRING,
PEG_TIMESTMP TYPE STRING,
TRPEG_FLAG TYPE STRING,
TRPEG_CPUDT TYPE STRING,
TRPEG_CPUTM TYPE STRING,
TRPEG_USNAM TYPE STRING,
TRPEG_TCODE TYPE STRING,
TRPEG_TIMESTMP TYPE STRING,
DIS_CPUDT TYPE STRING,
DIS_CPUTM TYPE STRING,
DIS_USNAM TYPE STRING,
DIS_TCODE TYPE STRING,
DIS_TIMESTMP TYPE STRING,
FIXRL TYPE STRING,
FRACTQTY TYPE STRING,
PEG_EXC_CAT TYPE STRING,
EXCESS TYPE STRING,
SCRAP TYPE STRING,
LOST TYPE STRING,
DICOST TYPE STRING,
DICOMM TYPE STRING,
DICASH TYPE STRING,
DIRA TYPE STRING,
DIEVA TYPE STRING,
DECOST TYPE STRING,
DECOMM TYPE STRING,
DECASH TYPE STRING,
DSTOCK TYPE STRING,
DIVARI TYPE STRING,
DISCRP TYPE STRING,
VERSI TYPE STRING,
DILCOMM TYPE STRING,
DILACT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PEG_DIS_ADMIN_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_PEG_DIS_ADMIN_STR-MANDT sy-vline 
WA_PEG_DIS_ADMIN_STR-LOGNUMBER sy-vline 
WA_PEG_DIS_ADMIN_STR-GRPNR sy-vline 
WA_PEG_DIS_ADMIN_STR-PEG_CPUDT sy-vline 
WA_PEG_DIS_ADMIN_STR-PEG_CPUTM sy-vline 
WA_PEG_DIS_ADMIN_STR-PEG_USNAM sy-vline 
WA_PEG_DIS_ADMIN_STR-PEG_TCODE sy-vline 
WA_PEG_DIS_ADMIN_STR-PEG_TIMESTMP sy-vline 
WA_PEG_DIS_ADMIN_STR-TRPEG_FLAG sy-vline 
WA_PEG_DIS_ADMIN_STR-TRPEG_CPUDT sy-vline 
WA_PEG_DIS_ADMIN_STR-TRPEG_CPUTM sy-vline 
WA_PEG_DIS_ADMIN_STR-TRPEG_USNAM sy-vline 
WA_PEG_DIS_ADMIN_STR-TRPEG_TCODE sy-vline 
WA_PEG_DIS_ADMIN_STR-TRPEG_TIMESTMP sy-vline 
WA_PEG_DIS_ADMIN_STR-DIS_CPUDT sy-vline 
WA_PEG_DIS_ADMIN_STR-DIS_CPUTM sy-vline 
WA_PEG_DIS_ADMIN_STR-DIS_USNAM sy-vline 
WA_PEG_DIS_ADMIN_STR-DIS_TCODE sy-vline 
WA_PEG_DIS_ADMIN_STR-DIS_TIMESTMP sy-vline 
WA_PEG_DIS_ADMIN_STR-FIXRL sy-vline 
WA_PEG_DIS_ADMIN_STR-FRACTQTY sy-vline 
WA_PEG_DIS_ADMIN_STR-PEG_EXC_CAT sy-vline 
WA_PEG_DIS_ADMIN_STR-EXCESS sy-vline 
WA_PEG_DIS_ADMIN_STR-SCRAP sy-vline 
WA_PEG_DIS_ADMIN_STR-LOST sy-vline 
WA_PEG_DIS_ADMIN_STR-DICOST sy-vline 
WA_PEG_DIS_ADMIN_STR-DICOMM sy-vline 
WA_PEG_DIS_ADMIN_STR-DICASH sy-vline 
WA_PEG_DIS_ADMIN_STR-DIRA sy-vline 
WA_PEG_DIS_ADMIN_STR-DIEVA sy-vline 
WA_PEG_DIS_ADMIN_STR-DECOST sy-vline 
WA_PEG_DIS_ADMIN_STR-DECOMM sy-vline 
WA_PEG_DIS_ADMIN_STR-DECASH sy-vline 
WA_PEG_DIS_ADMIN_STR-DSTOCK sy-vline 
WA_PEG_DIS_ADMIN_STR-DIVARI sy-vline 
WA_PEG_DIS_ADMIN_STR-DISCRP sy-vline 
WA_PEG_DIS_ADMIN_STR-VERSI sy-vline 
WA_PEG_DIS_ADMIN_STR-DILCOMM sy-vline 
WA_PEG_DIS_ADMIN_STR-DILACT sy-vline      INTO ld_text SEPARATED BY SPACE.

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