ABAP Select data from SAP table /SAPAPO/QTDISS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/QTDISS 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 /SAPAPO/QTDISS. 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 /SAPAPO/QTDISS 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_/SAPAPO/QTDISS TYPE STANDARD TABLE OF /SAPAPO/QTDISS,
      WA_/SAPAPO/QTDISS TYPE /SAPAPO/QTDISS,
      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: </SAPAPO/QTDISS> TYPE /SAPAPO/QTDISS.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/QTDISS
  INTO TABLE IT_/SAPAPO/QTDISS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/QTDISS
*  INTO TABLE @DATA(IT_/SAPAPO/QTDISS2).
*--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_/SAPAPO/QTDISS INDEX 1 INTO DATA(WA_/SAPAPO/QTDISS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/QTDISS ASSIGNING </SAPAPO/QTDISS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/QTDISS>-PERIODE = 1.
</SAPAPO/QTDISS>-PERTXT = 1.
</SAPAPO/QTDISS>-FLGTODAY = 1.
</SAPAPO/QTDISS>-FLGDELTA = 1.
</SAPAPO/QTDISS>-KOMTH = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/QTDISS INTO WA_/SAPAPO/QTDISS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/QTDISS-SPERI1, sy-vline,
  WA_/SAPAPO/QTDISS-SPERI2, sy-vline,
  WA_/SAPAPO/QTDISS-PERIV1, sy-vline,
  WA_/SAPAPO/QTDISS-PERIV2, sy-vline,
  WA_/SAPAPO/QTDISS-TMPQTY, sy-vline,
  WA_/SAPAPO/QTDISS-OWNQTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/QTDISS 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_/SAPAPO/QTDISS 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_/SAPAPO/QTDISS INTO WA_/SAPAPO/QTDISS.


*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 CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/QTDISS-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/QTDISS-MEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/QTDISS-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/QTDISS-LOGSYS.
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_/SAPAPO/QTDISS_STR, 
PERIODE TYPE STRING,
PERTXT TYPE STRING,
FLGTODAY TYPE STRING,
FLGDELTA TYPE STRING,
KOMTH TYPE STRING,
SPERI1 TYPE STRING,
SPERI2 TYPE STRING,
PERIV1 TYPE STRING,
PERIV2 TYPE STRING,
TMPQTY TYPE STRING,
OWNQTY TYPE STRING,
SUMQTY TYPE STRING,
COLLECT TYPE STRING,
USEDPER TYPE STRING,
TEXT1 TYPE STRING,
TEXT2 TYPE STRING,
KONOB TYPE STRING,
CHARACTER1 TYPE STRING,
CHARACTER2 TYPE STRING,
CHARACTER3 TYPE STRING,
CHARACTER4 TYPE STRING,
CHARACTER5 TYPE STRING,
CHARACTER6 TYPE STRING,
CHARACTER7 TYPE STRING,
CHARACTER8 TYPE STRING,
CHARACTER9 TYPE STRING,
MEINH TYPE STRING,
EXPAND TYPE STRING,
CNFSUM TYPE STRING,
MISQTY TYPE STRING,
LIGHT TYPE STRING,
ICON TYPE STRING,
MARK TYPE STRING,
COUNT TYPE STRING,
VTEXT TYPE STRING,
CHARCOMB TYPE STRING,
STTS_TXT TYPE STRING,
GROUP TYPE STRING,
KONAK_ICON TYPE STRING,
STATUS_ICON TYPE STRING,
LOGSYS TYPE STRING,
R3OBJ TYPE STRING,
KCGRP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/QTDISS_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_/SAPAPO/QTDISS_STR-PERIODE sy-vline 
WA_/SAPAPO/QTDISS_STR-PERTXT sy-vline 
WA_/SAPAPO/QTDISS_STR-FLGTODAY sy-vline 
WA_/SAPAPO/QTDISS_STR-FLGDELTA sy-vline 
WA_/SAPAPO/QTDISS_STR-KOMTH sy-vline 
WA_/SAPAPO/QTDISS_STR-SPERI1 sy-vline 
WA_/SAPAPO/QTDISS_STR-SPERI2 sy-vline 
WA_/SAPAPO/QTDISS_STR-PERIV1 sy-vline 
WA_/SAPAPO/QTDISS_STR-PERIV2 sy-vline 
WA_/SAPAPO/QTDISS_STR-TMPQTY sy-vline 
WA_/SAPAPO/QTDISS_STR-OWNQTY sy-vline 
WA_/SAPAPO/QTDISS_STR-SUMQTY sy-vline 
WA_/SAPAPO/QTDISS_STR-COLLECT sy-vline 
WA_/SAPAPO/QTDISS_STR-USEDPER sy-vline 
WA_/SAPAPO/QTDISS_STR-TEXT1 sy-vline 
WA_/SAPAPO/QTDISS_STR-TEXT2 sy-vline 
WA_/SAPAPO/QTDISS_STR-KONOB sy-vline 
WA_/SAPAPO/QTDISS_STR-CHARACTER1 sy-vline 
WA_/SAPAPO/QTDISS_STR-CHARACTER2 sy-vline 
WA_/SAPAPO/QTDISS_STR-CHARACTER3 sy-vline 
WA_/SAPAPO/QTDISS_STR-CHARACTER4 sy-vline 
WA_/SAPAPO/QTDISS_STR-CHARACTER5 sy-vline 
WA_/SAPAPO/QTDISS_STR-CHARACTER6 sy-vline 
WA_/SAPAPO/QTDISS_STR-CHARACTER7 sy-vline 
WA_/SAPAPO/QTDISS_STR-CHARACTER8 sy-vline 
WA_/SAPAPO/QTDISS_STR-CHARACTER9 sy-vline 
WA_/SAPAPO/QTDISS_STR-MEINH sy-vline 
WA_/SAPAPO/QTDISS_STR-EXPAND sy-vline 
WA_/SAPAPO/QTDISS_STR-CNFSUM sy-vline 
WA_/SAPAPO/QTDISS_STR-MISQTY sy-vline 
WA_/SAPAPO/QTDISS_STR-LIGHT sy-vline 
WA_/SAPAPO/QTDISS_STR-ICON sy-vline 
WA_/SAPAPO/QTDISS_STR-MARK sy-vline 
WA_/SAPAPO/QTDISS_STR-COUNT sy-vline 
WA_/SAPAPO/QTDISS_STR-VTEXT sy-vline 
WA_/SAPAPO/QTDISS_STR-CHARCOMB sy-vline 
WA_/SAPAPO/QTDISS_STR-STTS_TXT sy-vline 
WA_/SAPAPO/QTDISS_STR-GROUP sy-vline 
WA_/SAPAPO/QTDISS_STR-KONAK_ICON sy-vline 
WA_/SAPAPO/QTDISS_STR-STATUS_ICON sy-vline 
WA_/SAPAPO/QTDISS_STR-LOGSYS sy-vline 
WA_/SAPAPO/QTDISS_STR-R3OBJ sy-vline 
WA_/SAPAPO/QTDISS_STR-KCGRP sy-vline      INTO ld_text SEPARATED BY SPACE.

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