ABAP Select data from SAP table FOT_S_EXTAX_DOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FOT_S_EXTAX_DOC
*  INTO TABLE @DATA(IT_FOT_S_EXTAX_DOC2).
*--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_FOT_S_EXTAX_DOC INDEX 1 INTO DATA(WA_FOT_S_EXTAX_DOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FOT_S_EXTAX_DOC>-SYST_NAME = 1.
<FOT_S_EXTAX_DOC>-CLIENT = 1.
<FOT_S_EXTAX_DOC>-COMP_CODE = 1.
<FOT_S_EXTAX_DOC>-DOC_NUMBER = 1.
<FOT_S_EXTAX_DOC>-CURRENCY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FOT_S_EXTAX_DOC-CURR_DEC, sy-vline,
  WA_FOT_S_EXTAX_DOC-TXJCD_L1, sy-vline,
  WA_FOT_S_EXTAX_DOC-TXJCD_L2, sy-vline,
  WA_FOT_S_EXTAX_DOC-TXJCD_L3, sy-vline,
  WA_FOT_S_EXTAX_DOC-TXJCD_L4, sy-vline,
  WA_FOT_S_EXTAX_DOC-TAX_PER_ITEM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FOT_S_EXTAX_DOC 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_FOT_S_EXTAX_DOC 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_FOT_S_EXTAX_DOC INTO WA_FOT_S_EXTAX_DOC.


*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 SYST_NAME
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FOT_S_EXTAX_DOC-SYST_NAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FOT_S_EXTAX_DOC-SYST_NAME.
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_FOT_S_EXTAX_DOC_STR, 
SYST_NAME TYPE STRING,
CLIENT TYPE STRING,
COMP_CODE TYPE STRING,
DOC_NUMBER TYPE STRING,
CURRENCY TYPE STRING,
CURR_DEC TYPE STRING,
TXJCD_L1 TYPE STRING,
TXJCD_L2 TYPE STRING,
TXJCD_L3 TYPE STRING,
TXJCD_L4 TYPE STRING,
TAX_PER_ITEM TYPE STRING,
NR_LINE_ITEMS TYPE STRING,
GL_CURRENCY TYPE STRING,
GL_CURR_DEC TYPE STRING,
REP_DATE TYPE STRING,
RATEDEC TYPE STRING,
XEXTN TYPE STRING,
INTERF_VERSION TYPE STRING,
TAX_PROCEDURE TYPE STRING,
BUDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FOT_S_EXTAX_DOC_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_FOT_S_EXTAX_DOC_STR-SYST_NAME sy-vline 
WA_FOT_S_EXTAX_DOC_STR-CLIENT sy-vline 
WA_FOT_S_EXTAX_DOC_STR-COMP_CODE sy-vline 
WA_FOT_S_EXTAX_DOC_STR-DOC_NUMBER sy-vline 
WA_FOT_S_EXTAX_DOC_STR-CURRENCY sy-vline 
WA_FOT_S_EXTAX_DOC_STR-CURR_DEC sy-vline 
WA_FOT_S_EXTAX_DOC_STR-TXJCD_L1 sy-vline 
WA_FOT_S_EXTAX_DOC_STR-TXJCD_L2 sy-vline 
WA_FOT_S_EXTAX_DOC_STR-TXJCD_L3 sy-vline 
WA_FOT_S_EXTAX_DOC_STR-TXJCD_L4 sy-vline 
WA_FOT_S_EXTAX_DOC_STR-TAX_PER_ITEM sy-vline 
WA_FOT_S_EXTAX_DOC_STR-NR_LINE_ITEMS sy-vline 
WA_FOT_S_EXTAX_DOC_STR-GL_CURRENCY sy-vline 
WA_FOT_S_EXTAX_DOC_STR-GL_CURR_DEC sy-vline 
WA_FOT_S_EXTAX_DOC_STR-REP_DATE sy-vline 
WA_FOT_S_EXTAX_DOC_STR-RATEDEC sy-vline 
WA_FOT_S_EXTAX_DOC_STR-XEXTN sy-vline 
WA_FOT_S_EXTAX_DOC_STR-INTERF_VERSION sy-vline 
WA_FOT_S_EXTAX_DOC_STR-TAX_PROCEDURE sy-vline 
WA_FOT_S_EXTAX_DOC_STR-BUDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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