ABAP Select data from SAP table ASSIGNAR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ASSIGNAR
*  INTO TABLE @DATA(IT_ASSIGNAR2).
*--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_ASSIGNAR INDEX 1 INTO DATA(WA_ASSIGNAR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ASSIGNAR>-ICON_ASS = 1.
<ASSIGNAR>-COL_ASS = 1.
<ASSIGNAR>-AVSID = 1.
<ASSIGNAR>-ZUONR = 1.
<ASSIGNAR>-BELNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ASSIGNAR-BLART, sy-vline,
  WA_ASSIGNAR-BSCHL, sy-vline,
  WA_ASSIGNAR-XBLNR, sy-vline,
  WA_ASSIGNAR-HBLNR, sy-vline,
  WA_ASSIGNAR-BLDAT, sy-vline,
  WA_ASSIGNAR-WRSHB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ASSIGNAR 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_ASSIGNAR 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_ASSIGNAR INTO WA_ASSIGNAR.


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

*Conversion exit AC132, internal->external for field WRSHB
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ASSIGNAR-WRSHB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ASSIGNAR-WRSHB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field AZBTRG
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_ASSIGNAR-AZBTRG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ASSIGNAR-AZBTRG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ASSIGNAR-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ASSIGNAR-GJAHR.
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_ASSIGNAR_STR, 
ICON_ASS TYPE STRING,
COL_ASS TYPE STRING,
AVSID TYPE STRING,
ZUONR TYPE STRING,
BELNR TYPE STRING,
BLART TYPE STRING,
BSCHL TYPE STRING,
XBLNR TYPE STRING,
HBLNR TYPE STRING,
BLDAT TYPE STRING,
WRSHB TYPE STRING,
AZBTRG TYPE STRING,
WAERS TYPE STRING,
SGTXT TYPE STRING,
SHKZG TYPE STRING,
BUKRS TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
UMSKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ASSIGNAR_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_ASSIGNAR_STR-ICON_ASS sy-vline 
WA_ASSIGNAR_STR-COL_ASS sy-vline 
WA_ASSIGNAR_STR-AVSID sy-vline 
WA_ASSIGNAR_STR-ZUONR sy-vline 
WA_ASSIGNAR_STR-BELNR sy-vline 
WA_ASSIGNAR_STR-BLART sy-vline 
WA_ASSIGNAR_STR-BSCHL sy-vline 
WA_ASSIGNAR_STR-XBLNR sy-vline 
WA_ASSIGNAR_STR-HBLNR sy-vline 
WA_ASSIGNAR_STR-BLDAT sy-vline 
WA_ASSIGNAR_STR-WRSHB sy-vline 
WA_ASSIGNAR_STR-AZBTRG sy-vline 
WA_ASSIGNAR_STR-WAERS sy-vline 
WA_ASSIGNAR_STR-SGTXT sy-vline 
WA_ASSIGNAR_STR-SHKZG sy-vline 
WA_ASSIGNAR_STR-BUKRS sy-vline 
WA_ASSIGNAR_STR-GJAHR sy-vline 
WA_ASSIGNAR_STR-BUZEI sy-vline 
WA_ASSIGNAR_STR-UMSKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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