ABAP Select data from SAP table AT042IY into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP AT042IY 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 AT042IY. 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 AT042IY 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_AT042IY TYPE STANDARD TABLE OF AT042IY,
      WA_AT042IY TYPE AT042IY,
      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: <AT042IY> TYPE AT042IY.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_AT042IY.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM AT042IY
  INTO TABLE IT_AT042IY.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AT042IY
*  INTO TABLE @DATA(IT_AT042IY2).
*--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_AT042IY INDEX 1 INTO DATA(WA_AT042IY2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_AT042IY ASSIGNING <AT042IY>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AT042IY>-MANDT = 1.
<AT042IY>-ZBUKR = 1.
<AT042IY>-HBKID = 1.
<AT042IY>-ZLSCH = 1.
<AT042IY>-WAERS = 1.

ENDLOOP.

LOOP AT IT_AT042IY INTO WA_AT042IY.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AT042IY-APPLI, sy-vline,
  WA_AT042IY-RANGF, sy-vline,
  WA_AT042IY-HKTID, sy-vline,
  WA_AT042IY-UKONT, sy-vline,
  WA_AT042IY-VKONT, sy-vline,
  WA_AT042IY-GEBKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AT042IY 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_AT042IY 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_AT042IY INTO WA_AT042IY.


*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 UKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AT042IY-UKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AT042IY-UKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AT042IY-VKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AT042IY-VKONT.
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_AT042IY_STR, 
MANDT TYPE STRING,
ZBUKR TYPE STRING,
HBKID TYPE STRING,
ZLSCH TYPE STRING,
WAERS TYPE STRING,
APPLI TYPE STRING,
RANGF TYPE STRING,
HKTID TYPE STRING,
UKONT TYPE STRING,
VKONT TYPE STRING,
GEBKZ TYPE STRING,
GSBER TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AT042IY_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_AT042IY_STR-MANDT sy-vline 
WA_AT042IY_STR-ZBUKR sy-vline 
WA_AT042IY_STR-HBKID sy-vline 
WA_AT042IY_STR-ZLSCH sy-vline 
WA_AT042IY_STR-WAERS sy-vline 
WA_AT042IY_STR-APPLI sy-vline 
WA_AT042IY_STR-RANGF sy-vline 
WA_AT042IY_STR-HKTID sy-vline 
WA_AT042IY_STR-UKONT sy-vline 
WA_AT042IY_STR-VKONT sy-vline 
WA_AT042IY_STR-GEBKZ sy-vline 
WA_AT042IY_STR-GSBER sy-vline 
WA_AT042IY_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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