ABAP Select data from SAP table AVIXCNLCHARACT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AVIXCNLCHARACT
*  INTO TABLE @DATA(IT_AVIXCNLCHARACT2).
*--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_AVIXCNLCHARACT INDEX 1 INTO DATA(WA_AVIXCNLCHARACT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AVIXCNLCHARACT>-MANDT = 1.
<AVIXCNLCHARACT>-INTRENO = 1.
<AVIXCNLCHARACT>-FIXFITCHARACT = 1.
<AVIXCNLCHARACT>-VALIDTO = 1.
<AVIXCNLCHARACT>-VALIDFROM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AVIXCNLCHARACT-FACTNOOFFIXFIT, sy-vline,
  WA_AVIXCNLCHARACT-FACTNOOFRO, sy-vline,
  WA_AVIXCNLCHARACT-FACTQUOTENUM, sy-vline,
  WA_AVIXCNLCHARACT-FACTQUOTEDENOM, sy-vline,
  WA_AVIXCNLCHARACT-FACTQUOTERD, sy-vline,
  WA_AVIXCNLCHARACT-NBOFPOINTSRD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AVIXCNLCHARACT 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_AVIXCNLCHARACT 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_AVIXCNLCHARACT INTO WA_AVIXCNLCHARACT.


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

*Conversion exit REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_AVIXCNLCHARACT-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AVIXCNLCHARACT-VALIDTO.
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_AVIXCNLCHARACT_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
FIXFITCHARACT TYPE STRING,
VALIDTO TYPE STRING,
VALIDFROM TYPE STRING,
FACTNOOFFIXFIT TYPE STRING,
FACTNOOFRO TYPE STRING,
FACTQUOTENUM TYPE STRING,
FACTQUOTEDENOM TYPE STRING,
FACTQUOTERD TYPE STRING,
NBOFPOINTSRD TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AVIXCNLCHARACT_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_AVIXCNLCHARACT_STR-MANDT sy-vline 
WA_AVIXCNLCHARACT_STR-INTRENO sy-vline 
WA_AVIXCNLCHARACT_STR-FIXFITCHARACT sy-vline 
WA_AVIXCNLCHARACT_STR-VALIDTO sy-vline 
WA_AVIXCNLCHARACT_STR-VALIDFROM sy-vline 
WA_AVIXCNLCHARACT_STR-FACTNOOFFIXFIT sy-vline 
WA_AVIXCNLCHARACT_STR-FACTNOOFRO sy-vline 
WA_AVIXCNLCHARACT_STR-FACTQUOTENUM sy-vline 
WA_AVIXCNLCHARACT_STR-FACTQUOTEDENOM sy-vline 
WA_AVIXCNLCHARACT_STR-FACTQUOTERD sy-vline 
WA_AVIXCNLCHARACT_STR-NBOFPOINTSRD sy-vline 
WA_AVIXCNLCHARACT_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.