ABAP Select data from SAP table AVICNSCS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AVICNSCS
*  INTO TABLE @DATA(IT_AVICNSCS2).
*--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_AVICNSCS INDEX 1 INTO DATA(WA_AVICNSCS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AVICNSCS>-MANDT = 1.
<AVICNSCS>-INTRENO = 1.
<AVICNSCS>-OBJNR = 1.
<AVICNSCS>-SNKSL = 1.
<AVICNSCS>-DGULTAB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AVICNSCS-SKOART, sy-vline,
  WA_AVICNSCS-ABRVAR, sy-vline,
  WA_AVICNSCS-RECNKOART, sy-vline,
  WA_AVICNSCS-SABRG, sy-vline,
  WA_AVICNSCS-ABREART, sy-vline,
  WA_AVICNSCS-RECNPLANDLORD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AVICNSCS 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_AVICNSCS 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_AVICNSCS INTO WA_AVICNSCS.


*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 SNKSL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AVICNSCS-SNKSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AVICNSCS-SNKSL.
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_AVICNSCS_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
OBJNR TYPE STRING,
SNKSL TYPE STRING,
DGULTAB TYPE STRING,
SKOART TYPE STRING,
ABRVAR TYPE STRING,
RECNKOART TYPE STRING,
SABRG TYPE STRING,
ABREART TYPE STRING,
RECNPLANDLORD TYPE STRING,
AE_INTRENO TYPE STRING,
WAERS TYPE STRING,
MAXCOST1 TYPE STRING,
MAXCOST2 TYPE STRING,
RECNSCSTOAE TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AVICNSCS_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_AVICNSCS_STR-MANDT sy-vline 
WA_AVICNSCS_STR-INTRENO sy-vline 
WA_AVICNSCS_STR-OBJNR sy-vline 
WA_AVICNSCS_STR-SNKSL sy-vline 
WA_AVICNSCS_STR-DGULTAB sy-vline 
WA_AVICNSCS_STR-SKOART sy-vline 
WA_AVICNSCS_STR-ABRVAR sy-vline 
WA_AVICNSCS_STR-RECNKOART sy-vline 
WA_AVICNSCS_STR-SABRG sy-vline 
WA_AVICNSCS_STR-ABREART sy-vline 
WA_AVICNSCS_STR-RECNPLANDLORD sy-vline 
WA_AVICNSCS_STR-AE_INTRENO sy-vline 
WA_AVICNSCS_STR-WAERS sy-vline 
WA_AVICNSCS_STR-MAXCOST1 sy-vline 
WA_AVICNSCS_STR-MAXCOST2 sy-vline 
WA_AVICNSCS_STR-RECNSCSTOAE sy-vline 
WA_AVICNSCS_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.