ABAP Select data from SAP table J_1B_TAXCOM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_1B_TAXCOM 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 J_1B_TAXCOM. 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 J_1B_TAXCOM 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_J_1B_TAXCOM TYPE STANDARD TABLE OF J_1B_TAXCOM,
      WA_J_1B_TAXCOM TYPE J_1B_TAXCOM,
      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: <J_1B_TAXCOM> TYPE J_1B_TAXCOM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_1B_TAXCOM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_1B_TAXCOM
  INTO TABLE IT_J_1B_TAXCOM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_1B_TAXCOM
*  INTO TABLE @DATA(IT_J_1B_TAXCOM2).
*--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_J_1B_TAXCOM INDEX 1 INTO DATA(WA_J_1B_TAXCOM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_1B_TAXCOM ASSIGNING <J_1B_TAXCOM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_1B_TAXCOM>-STEUC = 1.
<J_1B_TAXCOM>-TXREG_SF = 1.
<J_1B_TAXCOM>-TXREG_ST = 1.
<J_1B_TAXCOM>-XXIPI = 1.
<J_1B_TAXCOM>-XICMS = 1.

ENDLOOP.

LOOP AT IT_J_1B_TAXCOM INTO WA_J_1B_TAXCOM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_1B_TAXCOM-XSUBT, sy-vline,
  WA_J_1B_TAXCOM-TAXBS, sy-vline,
  WA_J_1B_TAXCOM-IPISP, sy-vline,
  WA_J_1B_TAXCOM-DOCTYP, sy-vline,
  WA_J_1B_TAXCOM-MTORG, sy-vline,
  WA_J_1B_TAXCOM-MTUSE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_1B_TAXCOM 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_J_1B_TAXCOM 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_J_1B_TAXCOM INTO WA_J_1B_TAXCOM.


*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 LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1B_TAXCOM-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1B_TAXCOM-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_1B_TAXCOM-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1B_TAXCOM-VRKME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SRVNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1B_TAXCOM-SRVNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1B_TAXCOM-SRVNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GPART_KK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1B_TAXCOM-GPART_KK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1B_TAXCOM-GPART_KK.
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_J_1B_TAXCOM_STR, 
STEUC TYPE STRING,
TXREG_SF TYPE STRING,
TXREG_ST TYPE STRING,
XXIPI TYPE STRING,
XICMS TYPE STRING,
XSUBT TYPE STRING,
TAXBS TYPE STRING,
IPISP TYPE STRING,
DOCTYP TYPE STRING,
MTORG TYPE STRING,
MTUSE TYPE STRING,
OWNPR TYPE STRING,
MATKL TYPE STRING,
BRSCH TYPE STRING,
CITYC TYPE STRING,
LIFNR TYPE STRING,
MGAME TYPE STRING,
VRKME TYPE STRING,
ORIGDATE TYPE STRING,
LOC_PR TYPE STRING,
LOC_SE TYPE STRING,
LOC_SR TYPE STRING,
BUZEI TYPE STRING,
BUZEI_CO TYPE STRING,
SRVNR TYPE STRING,
IPICONTRIBUTOR TYPE STRING,
CNAE TYPE STRING,
CRTN TYPE STRING,
ICMSTAXPAY TYPE STRING,
INDTYP TYPE STRING,
TDT TYPE STRING,
COMSIZE TYPE STRING,
DECREGPC TYPE STRING,
LEGALNAT TYPE STRING,
EXTWG TYPE STRING,
PRDHA TYPE STRING,
GPART_KK TYPE STRING,
MATNR_KK TYPE STRING,
SRVTY_KK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_1B_TAXCOM_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_J_1B_TAXCOM_STR-STEUC sy-vline 
WA_J_1B_TAXCOM_STR-TXREG_SF sy-vline 
WA_J_1B_TAXCOM_STR-TXREG_ST sy-vline 
WA_J_1B_TAXCOM_STR-XXIPI sy-vline 
WA_J_1B_TAXCOM_STR-XICMS sy-vline 
WA_J_1B_TAXCOM_STR-XSUBT sy-vline 
WA_J_1B_TAXCOM_STR-TAXBS sy-vline 
WA_J_1B_TAXCOM_STR-IPISP sy-vline 
WA_J_1B_TAXCOM_STR-DOCTYP sy-vline 
WA_J_1B_TAXCOM_STR-MTORG sy-vline 
WA_J_1B_TAXCOM_STR-MTUSE sy-vline 
WA_J_1B_TAXCOM_STR-OWNPR sy-vline 
WA_J_1B_TAXCOM_STR-MATKL sy-vline 
WA_J_1B_TAXCOM_STR-BRSCH sy-vline 
WA_J_1B_TAXCOM_STR-CITYC sy-vline 
WA_J_1B_TAXCOM_STR-LIFNR sy-vline 
WA_J_1B_TAXCOM_STR-MGAME sy-vline 
WA_J_1B_TAXCOM_STR-VRKME sy-vline 
WA_J_1B_TAXCOM_STR-ORIGDATE sy-vline 
WA_J_1B_TAXCOM_STR-LOC_PR sy-vline 
WA_J_1B_TAXCOM_STR-LOC_SE sy-vline 
WA_J_1B_TAXCOM_STR-LOC_SR sy-vline 
WA_J_1B_TAXCOM_STR-BUZEI sy-vline 
WA_J_1B_TAXCOM_STR-BUZEI_CO sy-vline 
WA_J_1B_TAXCOM_STR-SRVNR sy-vline 
WA_J_1B_TAXCOM_STR-IPICONTRIBUTOR sy-vline 
WA_J_1B_TAXCOM_STR-CNAE sy-vline 
WA_J_1B_TAXCOM_STR-CRTN sy-vline 
WA_J_1B_TAXCOM_STR-ICMSTAXPAY sy-vline 
WA_J_1B_TAXCOM_STR-INDTYP sy-vline 
WA_J_1B_TAXCOM_STR-TDT sy-vline 
WA_J_1B_TAXCOM_STR-COMSIZE sy-vline 
WA_J_1B_TAXCOM_STR-DECREGPC sy-vline 
WA_J_1B_TAXCOM_STR-LEGALNAT sy-vline 
WA_J_1B_TAXCOM_STR-EXTWG sy-vline 
WA_J_1B_TAXCOM_STR-PRDHA sy-vline 
WA_J_1B_TAXCOM_STR-GPART_KK sy-vline 
WA_J_1B_TAXCOM_STR-MATNR_KK sy-vline 
WA_J_1B_TAXCOM_STR-SRVTY_KK sy-vline      INTO ld_text SEPARATED BY SPACE.

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