ABAP Select data from SAP table BTXOVER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BTXOVER
*  INTO TABLE @DATA(IT_BTXOVER2).
*--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_BTXOVER INDEX 1 INTO DATA(WA_BTXOVER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BTXOVER>-MANDT = 1.
<BTXOVER>-EMPGROUP = 1.
<BTXOVER>-COUNTRY = 1.
<BTXOVER>-INCOME = 1.
<BTXOVER>-TAXCODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BTXOVER-TAXTYPE, sy-vline,
  WA_BTXOVER-FORMULA, sy-vline,
  WA_BTXOVER-STARTDATE, sy-vline,
  WA_BTXOVER-RESIDENT, sy-vline,
  WA_BTXOVER-RESCIND, sy-vline,
  WA_BTXOVER-MAINTDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BTXOVER 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_BTXOVER 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_BTXOVER INTO WA_BTXOVER.


*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 TXTYP, internal->external for field TAXTYPE
CALL FUNCTION 'CONVERSION_EXIT_TXTYP_OUTPUT'
  EXPORTING
    input =                      WA_BTXOVER-TAXTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BTXOVER-TAXTYPE.
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_BTXOVER_STR, 
MANDT TYPE STRING,
EMPGROUP TYPE STRING,
COUNTRY TYPE STRING,
INCOME TYPE STRING,
TAXCODE TYPE STRING,
TAXTYPE TYPE STRING,
FORMULA TYPE STRING,
STARTDATE TYPE STRING,
RESIDENT TYPE STRING,
RESCIND TYPE STRING,
MAINTDATE TYPE STRING,
MAINTTIME TYPE STRING,
OVERTYPE TYPE STRING,
AMOUNT TYPE STRING,
RATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BTXOVER_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_BTXOVER_STR-MANDT sy-vline 
WA_BTXOVER_STR-EMPGROUP sy-vline 
WA_BTXOVER_STR-COUNTRY sy-vline 
WA_BTXOVER_STR-INCOME sy-vline 
WA_BTXOVER_STR-TAXCODE sy-vline 
WA_BTXOVER_STR-TAXTYPE sy-vline 
WA_BTXOVER_STR-FORMULA sy-vline 
WA_BTXOVER_STR-STARTDATE sy-vline 
WA_BTXOVER_STR-RESIDENT sy-vline 
WA_BTXOVER_STR-RESCIND sy-vline 
WA_BTXOVER_STR-MAINTDATE sy-vline 
WA_BTXOVER_STR-MAINTTIME sy-vline 
WA_BTXOVER_STR-OVERTYPE sy-vline 
WA_BTXOVER_STR-AMOUNT sy-vline 
WA_BTXOVER_STR-RATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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