ABAP Select data from SAP table AVIXCITIRE2HEAD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP AVIXCITIRE2HEAD 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 AVIXCITIRE2HEAD. 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 AVIXCITIRE2HEAD 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_AVIXCITIRE2HEAD TYPE STANDARD TABLE OF AVIXCITIRE2HEAD,
      WA_AVIXCITIRE2HEAD TYPE AVIXCITIRE2HEAD,
      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: <AVIXCITIRE2HEAD> TYPE AVIXCITIRE2HEAD.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_AVIXCITIRE2HEAD.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM AVIXCITIRE2HEAD
  INTO TABLE IT_AVIXCITIRE2HEAD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AVIXCITIRE2HEAD
*  INTO TABLE @DATA(IT_AVIXCITIRE2HEAD2).
*--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_AVIXCITIRE2HEAD INDEX 1 INTO DATA(WA_AVIXCITIRE2HEAD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_AVIXCITIRE2HEAD ASSIGNING <AVIXCITIRE2HEAD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AVIXCITIRE2HEAD>-MANDT = 1.
<AVIXCITIRE2HEAD>-INTRENO = 1.
<AVIXCITIRE2HEAD>-DTREG = 1.
<AVIXCITIRE2HEAD>-SERIE = 1.
<AVIXCITIRE2HEAD>-NRREG = 1.

ENDLOOP.

LOOP AT IT_AVIXCITIRE2HEAD INTO WA_AVIXCITIRE2HEAD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AVIXCITIRE2HEAD-NSREG, sy-vline,
  WA_AVIXCITIRE2HEAD-REGOFF, sy-vline,
  WA_AVIXCITIRE2HEAD-IRESTART, sy-vline,
  WA_AVIXCITIRE2HEAD-IRECALC, sy-vline,
  WA_AVIXCITIRE2HEAD-PAYER, sy-vline,
  WA_AVIXCITIRE2HEAD-ACQUIRED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AVIXCITIRE2HEAD 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_AVIXCITIRE2HEAD 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_AVIXCITIRE2HEAD INTO WA_AVIXCITIRE2HEAD.


*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_AVIXCITIRE2HEAD_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
DTREG TYPE STRING,
SERIE TYPE STRING,
NRREG TYPE STRING,
NSREG TYPE STRING,
REGOFF TYPE STRING,
IRESTART TYPE STRING,
IRECALC TYPE STRING,
PAYER TYPE STRING,
ACQUIRED TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AVIXCITIRE2HEAD_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_AVIXCITIRE2HEAD_STR-MANDT sy-vline 
WA_AVIXCITIRE2HEAD_STR-INTRENO sy-vline 
WA_AVIXCITIRE2HEAD_STR-DTREG sy-vline 
WA_AVIXCITIRE2HEAD_STR-SERIE sy-vline 
WA_AVIXCITIRE2HEAD_STR-NRREG sy-vline 
WA_AVIXCITIRE2HEAD_STR-NSREG sy-vline 
WA_AVIXCITIRE2HEAD_STR-REGOFF sy-vline 
WA_AVIXCITIRE2HEAD_STR-IRESTART sy-vline 
WA_AVIXCITIRE2HEAD_STR-IRECALC sy-vline 
WA_AVIXCITIRE2HEAD_STR-PAYER sy-vline 
WA_AVIXCITIRE2HEAD_STR-ACQUIRED sy-vline 
WA_AVIXCITIRE2HEAD_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.