ABAP Select data from SAP table IKZVATRETCUST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IKZVATRETCUST
*  INTO TABLE @DATA(IT_IKZVATRETCUST2).
*--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_IKZVATRETCUST INDEX 1 INTO DATA(WA_IKZVATRETCUST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IKZVATRETCUST>-MANDT = 1.
<IKZVATRETCUST>-KZ_VATRETURNVERSION = 1.
<IKZVATRETCUST>-KZ_VATRETURNSECTION = 1.
<IKZVATRETCUST>-KZ_VATLINEITEM = 1.
<IKZVATRETCUST>-KZ_VATOPERATIONCODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IKZVATRETCUST-KZ_VATRETURNSECTIONCOLUMN, sy-vline,
  WA_IKZVATRETCUST-KZ_VATCONDITIONNUMBER, sy-vline,
  WA_IKZVATRETCUST-KZ_VATRETURNSECTIONTYPE, sy-vline,
  WA_IKZVATRETCUST-TAXCODE, sy-vline,
  WA_IKZVATRETCUST-ACCOUNTINGDOCUMENTTYPE, sy-vline,
  WA_IKZVATRETCUST-DEBITCREDITCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IKZVATRETCUST 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_IKZVATRETCUST 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_IKZVATRETCUST INTO WA_IKZVATRETCUST.


*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_IKZVATRETCUST_STR, 
MANDT TYPE STRING,
KZ_VATRETURNVERSION TYPE STRING,
KZ_VATRETURNSECTION TYPE STRING,
KZ_VATLINEITEM TYPE STRING,
KZ_VATOPERATIONCODE TYPE STRING,
KZ_VATRETURNSECTIONCOLUMN TYPE STRING,
KZ_VATCONDITIONNUMBER TYPE STRING,
KZ_VATRETURNSECTIONTYPE TYPE STRING,
TAXCODE TYPE STRING,
ACCOUNTINGDOCUMENTTYPE TYPE STRING,
DEBITCREDITCODE TYPE STRING,
TAXDECLNAMOUNTTYPE TYPE STRING,
HASNEGATIVESIGN TYPE STRING,
TRANSACTIONTYPEDETERMINATION TYPE STRING,
KZ_TAXTURNOVERCODE TYPE STRING,
KZ_TAXNORMID TYPE STRING,
TOTALNUMBERISCONDITION TYPE STRING,
VATRETURNITEMDESCRIPTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IKZVATRETCUST_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_IKZVATRETCUST_STR-MANDT sy-vline 
WA_IKZVATRETCUST_STR-KZ_VATRETURNVERSION sy-vline 
WA_IKZVATRETCUST_STR-KZ_VATRETURNSECTION sy-vline 
WA_IKZVATRETCUST_STR-KZ_VATLINEITEM sy-vline 
WA_IKZVATRETCUST_STR-KZ_VATOPERATIONCODE sy-vline 
WA_IKZVATRETCUST_STR-KZ_VATRETURNSECTIONCOLUMN sy-vline 
WA_IKZVATRETCUST_STR-KZ_VATCONDITIONNUMBER sy-vline 
WA_IKZVATRETCUST_STR-KZ_VATRETURNSECTIONTYPE sy-vline 
WA_IKZVATRETCUST_STR-TAXCODE sy-vline 
WA_IKZVATRETCUST_STR-ACCOUNTINGDOCUMENTTYPE sy-vline 
WA_IKZVATRETCUST_STR-DEBITCREDITCODE sy-vline 
WA_IKZVATRETCUST_STR-TAXDECLNAMOUNTTYPE sy-vline 
WA_IKZVATRETCUST_STR-HASNEGATIVESIGN sy-vline 
WA_IKZVATRETCUST_STR-TRANSACTIONTYPEDETERMINATION sy-vline 
WA_IKZVATRETCUST_STR-KZ_TAXTURNOVERCODE sy-vline 
WA_IKZVATRETCUST_STR-KZ_TAXNORMID sy-vline 
WA_IKZVATRETCUST_STR-TOTALNUMBERISCONDITION sy-vline 
WA_IKZVATRETCUST_STR-VATRETURNITEMDESCRIPTION sy-vline      INTO ld_text SEPARATED BY SPACE.

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