ABAP Select data from SAP table COM_TAX00 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP COM_TAX00 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 COM_TAX00. 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 COM_TAX00 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_COM_TAX00 TYPE STANDARD TABLE OF COM_TAX00,
      WA_COM_TAX00 TYPE COM_TAX00,
      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: <COM_TAX00> TYPE COM_TAX00.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_COM_TAX00.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM COM_TAX00
  INTO TABLE IT_COM_TAX00.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM COM_TAX00
*  INTO TABLE @DATA(IT_COM_TAX002).
*--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_COM_TAX00 INDEX 1 INTO DATA(WA_COM_TAX002).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_COM_TAX00 ASSIGNING <COM_TAX00>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<COM_TAX00>-CLIENT = 1.
<COM_TAX00>-COMP_CODE = 1.
<COM_TAX00>-DIVISION = 1.
<COM_TAX00>-COUNTRY = 1.
<COM_TAX00>-DOC_NUMBER = 1.

ENDLOOP.

LOOP AT IT_COM_TAX00 INTO WA_COM_TAX00.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_COM_TAX00-POS_NO, sy-vline,
  WA_COM_TAX00-ACCNT_NO, sy-vline,
  WA_COM_TAX00-ACCNT_CLS, sy-vline,
  WA_COM_TAX00-TAX_DATE, sy-vline,
  WA_COM_TAX00-TXJCD_ST, sy-vline,
  WA_COM_TAX00-TXJCD_SF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_COM_TAX00 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_COM_TAX00 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_COM_TAX00 INTO WA_COM_TAX00.


*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 DOC_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_COM_TAX00-DOC_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COM_TAX00-DOC_NUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ACCNT_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_COM_TAX00-ACCNT_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COM_TAX00-ACCNT_NO.
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_COM_TAX00_STR, 
CLIENT TYPE STRING,
COMP_CODE TYPE STRING,
DIVISION TYPE STRING,
COUNTRY TYPE STRING,
DOC_NUMBER TYPE STRING,
POS_NO TYPE STRING,
ACCNT_NO TYPE STRING,
ACCNT_CLS TYPE STRING,
TAX_DATE TYPE STRING,
TXJCD_ST TYPE STRING,
TXJCD_SF TYPE STRING,
TXJCD_POA TYPE STRING,
TXJCD_POO TYPE STRING,
TXJCD_IND TYPE STRING,
PTP_IND TYPE STRING,
APAR_IND TYPE STRING,
TXJCD_L1 TYPE STRING,
TXJCD_L2 TYPE STRING,
TXJCD_L3 TYPE STRING,
TXJCD_L4 TYPE STRING,
TAX_TYPE TYPE STRING,
MATNR TYPE STRING,
PROD_CODE TYPE STRING,
QUANTITY TYPE STRING,
UNIT TYPE STRING,
AMOUNT TYPE STRING,
CURRENCY TYPE STRING,
CURR_DEC TYPE STRING,
FREIGHT_AM TYPE STRING,
EXEMPT_AMT TYPE STRING,
EXEMPT_IND TYPE STRING,
CREDIT_IND TYPE STRING,
UPDATE_IND TYPE STRING,
OVWRT_IND TYPE STRING,
TAXPCT0 TYPE STRING,
TAXPCT1 TYPE STRING,
TAXPCT2 TYPE STRING,
TAXPCT3 TYPE STRING,
TAXPCT4 TYPE STRING,
TAXPCT5 TYPE STRING,
TAXPCT6 TYPE STRING,
TAXPCT7 TYPE STRING,
TAXPCT8 TYPE STRING,
TAXPCT9 TYPE STRING,
TAXPCOV TYPE STRING,
TAXAMT0 TYPE STRING,
TAXAMT1 TYPE STRING,
TAXAMT2 TYPE STRING,
TAXAMT3 TYPE STRING,
TAXAMT4 TYPE STRING,
TAXAMT5 TYPE STRING,
TAXAMT6 TYPE STRING,
TAXAMT7 TYPE STRING,
TAXAMT8 TYPE STRING,
TAXAMT9 TYPE STRING,
TAXAMOV TYPE STRING,
TAXBAS0 TYPE STRING,
TAXBAS1 TYPE STRING,
TAXBAS2 TYPE STRING,
TAXBAS3 TYPE STRING,
TAXBAS4 TYPE STRING,
TAXBAS5 TYPE STRING,
TAXBAS6 TYPE STRING,
TAXBAS7 TYPE STRING,
TAXBAS8 TYPE STRING,
TAXBAS9 TYPE STRING,
EXMATFLG TYPE STRING,
EXCUSFLG TYPE STRING,
EXAMT0 TYPE STRING,
EXAMT1 TYPE STRING,
EXAMT2 TYPE STRING,
EXAMT3 TYPE STRING,
EXAMT4 TYPE STRING,
EXAMT5 TYPE STRING,
EXAMT6 TYPE STRING,
EXAMT7 TYPE STRING,
EXAMT8 TYPE STRING,
EXAMT9 TYPE STRING,
EXCODE0 TYPE STRING,
EXCODE1 TYPE STRING,
EXCODE2 TYPE STRING,
EXCODE3 TYPE STRING,
EXCODE4 TYPE STRING,
EXCODE5 TYPE STRING,
EXCODE6 TYPE STRING,
EXCODE7 TYPE STRING,
EXCODE8 TYPE STRING,
EXCODE9 TYPE STRING,
EXCERTIF TYPE STRING,
EXREASON TYPE STRING,
USER_DATA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_COM_TAX00_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_COM_TAX00_STR-CLIENT sy-vline 
WA_COM_TAX00_STR-COMP_CODE sy-vline 
WA_COM_TAX00_STR-DIVISION sy-vline 
WA_COM_TAX00_STR-COUNTRY sy-vline 
WA_COM_TAX00_STR-DOC_NUMBER sy-vline 
WA_COM_TAX00_STR-POS_NO sy-vline 
WA_COM_TAX00_STR-ACCNT_NO sy-vline 
WA_COM_TAX00_STR-ACCNT_CLS sy-vline 
WA_COM_TAX00_STR-TAX_DATE sy-vline 
WA_COM_TAX00_STR-TXJCD_ST sy-vline 
WA_COM_TAX00_STR-TXJCD_SF sy-vline 
WA_COM_TAX00_STR-TXJCD_POA sy-vline 
WA_COM_TAX00_STR-TXJCD_POO sy-vline 
WA_COM_TAX00_STR-TXJCD_IND sy-vline 
WA_COM_TAX00_STR-PTP_IND sy-vline 
WA_COM_TAX00_STR-APAR_IND sy-vline 
WA_COM_TAX00_STR-TXJCD_L1 sy-vline 
WA_COM_TAX00_STR-TXJCD_L2 sy-vline 
WA_COM_TAX00_STR-TXJCD_L3 sy-vline 
WA_COM_TAX00_STR-TXJCD_L4 sy-vline 
WA_COM_TAX00_STR-TAX_TYPE sy-vline 
WA_COM_TAX00_STR-MATNR sy-vline 
WA_COM_TAX00_STR-PROD_CODE sy-vline 
WA_COM_TAX00_STR-QUANTITY sy-vline 
WA_COM_TAX00_STR-UNIT sy-vline 
WA_COM_TAX00_STR-AMOUNT sy-vline 
WA_COM_TAX00_STR-CURRENCY sy-vline 
WA_COM_TAX00_STR-CURR_DEC sy-vline 
WA_COM_TAX00_STR-FREIGHT_AM sy-vline 
WA_COM_TAX00_STR-EXEMPT_AMT sy-vline 
WA_COM_TAX00_STR-EXEMPT_IND sy-vline 
WA_COM_TAX00_STR-CREDIT_IND sy-vline 
WA_COM_TAX00_STR-UPDATE_IND sy-vline 
WA_COM_TAX00_STR-OVWRT_IND sy-vline 
WA_COM_TAX00_STR-TAXPCT0 sy-vline 
WA_COM_TAX00_STR-TAXPCT1 sy-vline 
WA_COM_TAX00_STR-TAXPCT2 sy-vline 
WA_COM_TAX00_STR-TAXPCT3 sy-vline 
WA_COM_TAX00_STR-TAXPCT4 sy-vline 
WA_COM_TAX00_STR-TAXPCT5 sy-vline 
WA_COM_TAX00_STR-TAXPCT6 sy-vline 
WA_COM_TAX00_STR-TAXPCT7 sy-vline 
WA_COM_TAX00_STR-TAXPCT8 sy-vline 
WA_COM_TAX00_STR-TAXPCT9 sy-vline 
WA_COM_TAX00_STR-TAXPCOV sy-vline 
WA_COM_TAX00_STR-TAXAMT0 sy-vline 
WA_COM_TAX00_STR-TAXAMT1 sy-vline 
WA_COM_TAX00_STR-TAXAMT2 sy-vline 
WA_COM_TAX00_STR-TAXAMT3 sy-vline 
WA_COM_TAX00_STR-TAXAMT4 sy-vline 
WA_COM_TAX00_STR-TAXAMT5 sy-vline 
WA_COM_TAX00_STR-TAXAMT6 sy-vline 
WA_COM_TAX00_STR-TAXAMT7 sy-vline 
WA_COM_TAX00_STR-TAXAMT8 sy-vline 
WA_COM_TAX00_STR-TAXAMT9 sy-vline 
WA_COM_TAX00_STR-TAXAMOV sy-vline 
WA_COM_TAX00_STR-TAXBAS0 sy-vline 
WA_COM_TAX00_STR-TAXBAS1 sy-vline 
WA_COM_TAX00_STR-TAXBAS2 sy-vline 
WA_COM_TAX00_STR-TAXBAS3 sy-vline 
WA_COM_TAX00_STR-TAXBAS4 sy-vline 
WA_COM_TAX00_STR-TAXBAS5 sy-vline 
WA_COM_TAX00_STR-TAXBAS6 sy-vline 
WA_COM_TAX00_STR-TAXBAS7 sy-vline 
WA_COM_TAX00_STR-TAXBAS8 sy-vline 
WA_COM_TAX00_STR-TAXBAS9 sy-vline 
WA_COM_TAX00_STR-EXMATFLG sy-vline 
WA_COM_TAX00_STR-EXCUSFLG sy-vline 
WA_COM_TAX00_STR-EXAMT0 sy-vline 
WA_COM_TAX00_STR-EXAMT1 sy-vline 
WA_COM_TAX00_STR-EXAMT2 sy-vline 
WA_COM_TAX00_STR-EXAMT3 sy-vline 
WA_COM_TAX00_STR-EXAMT4 sy-vline 
WA_COM_TAX00_STR-EXAMT5 sy-vline 
WA_COM_TAX00_STR-EXAMT6 sy-vline 
WA_COM_TAX00_STR-EXAMT7 sy-vline 
WA_COM_TAX00_STR-EXAMT8 sy-vline 
WA_COM_TAX00_STR-EXAMT9 sy-vline 
WA_COM_TAX00_STR-EXCODE0 sy-vline 
WA_COM_TAX00_STR-EXCODE1 sy-vline 
WA_COM_TAX00_STR-EXCODE2 sy-vline 
WA_COM_TAX00_STR-EXCODE3 sy-vline 
WA_COM_TAX00_STR-EXCODE4 sy-vline 
WA_COM_TAX00_STR-EXCODE5 sy-vline 
WA_COM_TAX00_STR-EXCODE6 sy-vline 
WA_COM_TAX00_STR-EXCODE7 sy-vline 
WA_COM_TAX00_STR-EXCODE8 sy-vline 
WA_COM_TAX00_STR-EXCODE9 sy-vline 
WA_COM_TAX00_STR-EXCERTIF sy-vline 
WA_COM_TAX00_STR-EXREASON sy-vline 
WA_COM_TAX00_STR-USER_DATA sy-vline      INTO ld_text SEPARATED BY SPACE.

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