ABAP Select data from SAP table PTRDGCOMNDIFFQTY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PTRDGCOMNDIFFQTY
*  INTO TABLE @DATA(IT_PTRDGCOMNDIFFQTY2).
*--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_PTRDGCOMNDIFFQTY INDEX 1 INTO DATA(WA_PTRDGCOMNDIFFQTY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PTRDGCOMNDIFFQTY>-MANDT = 1.
<PTRDGCOMNDIFFQTY>-CONTRACTNUM = 1.
<PTRDGCOMNDIFFQTY>-TRADINGCONTRACTITEM = 1.
<PTRDGCOMNDIFFQTY>-TRADINGCONTRACTCATEGORY = 1.
<PTRDGCOMNDIFFQTY>-TRADINGCONTRACTTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PTRDGCOMNDIFFQTY-TRDGCONTRACTITEMUNITOFMEASURE, sy-vline,
  WA_PTRDGCOMNDIFFQTY-TRADINGCONTRACTITEMQUANTITY, sy-vline,
  WA_PTRDGCOMNDIFFQTY-CONTRACTITEMCONSUMEDQUANTITY, sy-vline,
  WA_PTRDGCOMNDIFFQTY-TRDGCONTRITEMCANCELLEDQUANTITY, sy-vline,
  WA_PTRDGCOMNDIFFQTY-TRDGCONTRITEMWASHOUTQUANTITY, sy-vline,
  WA_PTRDGCOMNDIFFQTY-APPLICATIONRETURNQUANTITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PTRDGCOMNDIFFQTY 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_PTRDGCOMNDIFFQTY 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_PTRDGCOMNDIFFQTY INTO WA_PTRDGCOMNDIFFQTY.


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

*Conversion exit CUNIT, internal->external for field TRDGCONTRACTITEMUNITOFMEASURE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PTRDGCOMNDIFFQTY-TRDGCONTRACTITEMUNITOFMEASURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PTRDGCOMNDIFFQTY-TRDGCONTRACTITEMUNITOFMEASURE.
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_PTRDGCOMNDIFFQTY_STR, 
MANDT TYPE STRING,
CONTRACTNUM TYPE STRING,
TRADINGCONTRACTITEM TYPE STRING,
TRADINGCONTRACTCATEGORY TYPE STRING,
TRADINGCONTRACTTYPE TYPE STRING,
TRDGCONTRACTITEMUNITOFMEASURE TYPE STRING,
TRADINGCONTRACTITEMQUANTITY TYPE STRING,
CONTRACTITEMCONSUMEDQUANTITY TYPE STRING,
TRDGCONTRITEMCANCELLEDQUANTITY TYPE STRING,
TRDGCONTRITEMWASHOUTQUANTITY TYPE STRING,
APPLICATIONRETURNQUANTITY TYPE STRING,
CONTRITMPROVISIONALOVERFILLQTY TYPE STRING,
ACMCONTRITMPRVSNLUNDERFILLQTY TYPE STRING,
CONTRITMPERDELIVERYOVERFILLQTY TYPE STRING,
TRDGCONTRITEMUNDERFILLQUANTITY TYPE STRING,
FINALAPPLICATIONQUANTITY TYPE STRING,
CONTROVERFILLSETTLEDQUANTITY TYPE STRING,
ACMOVERFILLDIFFERENCEQUANTITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PTRDGCOMNDIFFQTY_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_PTRDGCOMNDIFFQTY_STR-MANDT sy-vline 
WA_PTRDGCOMNDIFFQTY_STR-CONTRACTNUM sy-vline 
WA_PTRDGCOMNDIFFQTY_STR-TRADINGCONTRACTITEM sy-vline 
WA_PTRDGCOMNDIFFQTY_STR-TRADINGCONTRACTCATEGORY sy-vline 
WA_PTRDGCOMNDIFFQTY_STR-TRADINGCONTRACTTYPE sy-vline 
WA_PTRDGCOMNDIFFQTY_STR-TRDGCONTRACTITEMUNITOFMEASURE sy-vline 
WA_PTRDGCOMNDIFFQTY_STR-TRADINGCONTRACTITEMQUANTITY sy-vline 
WA_PTRDGCOMNDIFFQTY_STR-CONTRACTITEMCONSUMEDQUANTITY sy-vline 
WA_PTRDGCOMNDIFFQTY_STR-TRDGCONTRITEMCANCELLEDQUANTITY sy-vline 
WA_PTRDGCOMNDIFFQTY_STR-TRDGCONTRITEMWASHOUTQUANTITY sy-vline 
WA_PTRDGCOMNDIFFQTY_STR-APPLICATIONRETURNQUANTITY sy-vline 
WA_PTRDGCOMNDIFFQTY_STR-CONTRITMPROVISIONALOVERFILLQTY sy-vline 
WA_PTRDGCOMNDIFFQTY_STR-ACMCONTRITMPRVSNLUNDERFILLQTY sy-vline 
WA_PTRDGCOMNDIFFQTY_STR-CONTRITMPERDELIVERYOVERFILLQTY sy-vline 
WA_PTRDGCOMNDIFFQTY_STR-TRDGCONTRITEMUNDERFILLQUANTITY sy-vline 
WA_PTRDGCOMNDIFFQTY_STR-FINALAPPLICATIONQUANTITY sy-vline 
WA_PTRDGCOMNDIFFQTY_STR-CONTROVERFILLSETTLEDQUANTITY sy-vline 
WA_PTRDGCOMNDIFFQTY_STR-ACMOVERFILLDIFFERENCEQUANTITY sy-vline      INTO ld_text SEPARATED BY SPACE.

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