ABAP Select data from SAP table VIITTCBASE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VIITTCBASE
*  INTO TABLE @DATA(IT_VIITTCBASE2).
*--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_VIITTCBASE INDEX 1 INTO DATA(WA_VIITTCBASE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VIITTCBASE>-MANDT = 1.
<VIITTCBASE>-BASEGUID = 1.
<VIITTCBASE>-INTRENO = 1.
<VIITTCBASE>-TAXCODE = 1.
<VIITTCBASE>-BASETYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VIITTCBASE-NETAMOUNT, sy-vline,
  WA_VIITTCBASE-TAXAMOUNT, sy-vline,
  WA_VIITTCBASE-DEDTAXAMT, sy-vline,
  WA_VIITTCBASE-NONDEDTAXAMT, sy-vline,
  WA_VIITTCBASE-CURRENCY, sy-vline,
  WA_VIITTCBASE-RETIREOPTRATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VIITTCBASE 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_VIITTCBASE 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_VIITTCBASE INTO WA_VIITTCBASE.


*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 REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_VIITTCBASE-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIITTCBASE-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_VIITTCBASE_STR, 
MANDT TYPE STRING,
BASEGUID TYPE STRING,
INTRENO TYPE STRING,
TAXCODE TYPE STRING,
BASETYPE TYPE STRING,
NETAMOUNT TYPE STRING,
TAXAMOUNT TYPE STRING,
DEDTAXAMT TYPE STRING,
NONDEDTAXAMT TYPE STRING,
CURRENCY TYPE STRING,
RETIREOPTRATE TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
RERF TYPE STRING,
DERF TYPE STRING,
TERF TYPE STRING,
REHER TYPE STRING,
RBEAR TYPE STRING,
DBEAR TYPE STRING,
TBEAR TYPE STRING,
RBHER TYPE STRING,
REFGUID TYPE STRING,
XTCBASE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VIITTCBASE_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_VIITTCBASE_STR-MANDT sy-vline 
WA_VIITTCBASE_STR-BASEGUID sy-vline 
WA_VIITTCBASE_STR-INTRENO sy-vline 
WA_VIITTCBASE_STR-TAXCODE sy-vline 
WA_VIITTCBASE_STR-BASETYPE sy-vline 
WA_VIITTCBASE_STR-NETAMOUNT sy-vline 
WA_VIITTCBASE_STR-TAXAMOUNT sy-vline 
WA_VIITTCBASE_STR-DEDTAXAMT sy-vline 
WA_VIITTCBASE_STR-NONDEDTAXAMT sy-vline 
WA_VIITTCBASE_STR-CURRENCY sy-vline 
WA_VIITTCBASE_STR-RETIREOPTRATE sy-vline 
WA_VIITTCBASE_STR-VALIDFROM sy-vline 
WA_VIITTCBASE_STR-VALIDTO sy-vline 
WA_VIITTCBASE_STR-RERF sy-vline 
WA_VIITTCBASE_STR-DERF sy-vline 
WA_VIITTCBASE_STR-TERF sy-vline 
WA_VIITTCBASE_STR-REHER sy-vline 
WA_VIITTCBASE_STR-RBEAR sy-vline 
WA_VIITTCBASE_STR-DBEAR sy-vline 
WA_VIITTCBASE_STR-TBEAR sy-vline 
WA_VIITTCBASE_STR-RBHER sy-vline 
WA_VIITTCBASE_STR-REFGUID sy-vline 
WA_VIITTCBASE_STR-XTCBASE sy-vline      INTO ld_text SEPARATED BY SPACE.

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