ABAP Select data from SAP table DIS_PEGQTY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DIS_PEGQTY
*  INTO TABLE @DATA(IT_DIS_PEGQTY2).
*--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_DIS_PEGQTY INDEX 1 INTO DATA(WA_DIS_PEGQTY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DIS_PEGQTY>-OBJNR = 1.
<DIS_PEGQTY>-GRPNR = 1.
<DIS_PEGQTY>-ASS_PSPNR = 1.
<DIS_PEGQTY>-BRK_OBJNR = 1.
<DIS_PEGQTY>-WAERS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DIS_PEGQTY-INSTK, sy-vline,
  WA_DIS_PEGQTY-MENGE, sy-vline,
  WA_DIS_PEGQTY-GAMNG, sy-vline,
  WA_DIS_PEGQTY-MEINS, sy-vline,
  WA_DIS_PEGQTY-WTG, sy-vline,
  WA_DIS_PEGQTY-WOG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DIS_PEGQTY 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_DIS_PEGQTY 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_DIS_PEGQTY INTO WA_DIS_PEGQTY.


*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 OBJNR, internal->external for field OBJNR
CALL FUNCTION 'CONVERSION_EXIT_OBJNR_OUTPUT'
  EXPORTING
    input =                      WA_DIS_PEGQTY-OBJNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIS_PEGQTY-OBJNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit OBJNR, internal->external for field BRK_OBJNR
CALL FUNCTION 'CONVERSION_EXIT_OBJNR_OUTPUT'
  EXPORTING
    input =                      WA_DIS_PEGQTY-BRK_OBJNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIS_PEGQTY-BRK_OBJNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit INSTK, internal->external for field INSTK
CALL FUNCTION 'CONVERSION_EXIT_INSTK_OUTPUT'
  EXPORTING
    input =                      WA_DIS_PEGQTY-INSTK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIS_PEGQTY-INSTK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DIS_PEGQTY-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIS_PEGQTY-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_DIS_PEGQTY_STR, 
OBJNR TYPE STRING,
GRPNR TYPE STRING,
ASS_PSPNR TYPE STRING,
BRK_OBJNR TYPE STRING,
WAERS TYPE STRING,
INSTK TYPE STRING,
MENGE TYPE STRING,
GAMNG TYPE STRING,
MEINS TYPE STRING,
WTG TYPE STRING,
WOG TYPE STRING,
WKG TYPE STRING,
MEG TYPE STRING,
TOPDAT TYPE STRING,
WERKS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DIS_PEGQTY_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_DIS_PEGQTY_STR-OBJNR sy-vline 
WA_DIS_PEGQTY_STR-GRPNR sy-vline 
WA_DIS_PEGQTY_STR-ASS_PSPNR sy-vline 
WA_DIS_PEGQTY_STR-BRK_OBJNR sy-vline 
WA_DIS_PEGQTY_STR-WAERS sy-vline 
WA_DIS_PEGQTY_STR-INSTK sy-vline 
WA_DIS_PEGQTY_STR-MENGE sy-vline 
WA_DIS_PEGQTY_STR-GAMNG sy-vline 
WA_DIS_PEGQTY_STR-MEINS sy-vline 
WA_DIS_PEGQTY_STR-WTG sy-vline 
WA_DIS_PEGQTY_STR-WOG sy-vline 
WA_DIS_PEGQTY_STR-WKG sy-vline 
WA_DIS_PEGQTY_STR-MEG sy-vline 
WA_DIS_PEGQTY_STR-TOPDAT sy-vline 
WA_DIS_PEGQTY_STR-WERKS sy-vline      INTO ld_text SEPARATED BY SPACE.

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