ABAP Select data from SAP table AVORRAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AVORRAT
*  INTO TABLE @DATA(IT_AVORRAT2).
*--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_AVORRAT INDEX 1 INTO DATA(WA_AVORRAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AVORRAT>-MANDT = 1.
<AVORRAT>-OBJTYP = 1.
<AVORRAT>-OBJVWD = 1.
<AVORRAT>-OBJVER = 1.
<AVORRAT>-OBJVAKEY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AVORRAT-ERDAT, sy-vline,
  WA_AVORRAT-ERZET, sy-vline,
  WA_AVORRAT-ENAME, sy-vline,
  WA_AVORRAT-BADAT, sy-vline,
  WA_AVORRAT-BRZET, sy-vline,
  WA_AVORRAT-BNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AVORRAT 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_AVORRAT 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_AVORRAT INTO WA_AVORRAT.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_AVORRAT_STR, 
MANDT TYPE STRING,
OBJTYP TYPE STRING,
OBJVWD TYPE STRING,
OBJVER TYPE STRING,
OBJVAKEY TYPE STRING,
ERDAT TYPE STRING,
ERZET TYPE STRING,
ENAME TYPE STRING,
BADAT TYPE STRING,
BRZET TYPE STRING,
BNAME TYPE STRING,
BSTAT TYPE STRING,
PERF_MESS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AVORRAT_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_AVORRAT_STR-MANDT sy-vline 
WA_AVORRAT_STR-OBJTYP sy-vline 
WA_AVORRAT_STR-OBJVWD sy-vline 
WA_AVORRAT_STR-OBJVER sy-vline 
WA_AVORRAT_STR-OBJVAKEY sy-vline 
WA_AVORRAT_STR-ERDAT sy-vline 
WA_AVORRAT_STR-ERZET sy-vline 
WA_AVORRAT_STR-ENAME sy-vline 
WA_AVORRAT_STR-BADAT sy-vline 
WA_AVORRAT_STR-BRZET sy-vline 
WA_AVORRAT_STR-BNAME sy-vline 
WA_AVORRAT_STR-BSTAT sy-vline 
WA_AVORRAT_STR-PERF_MESS sy-vline      INTO ld_text SEPARATED BY SPACE.

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