ABAP Select data from SAP table BAPI_J_1BNFSTX_READDATA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BAPI_J_1BNFSTX_READDATA 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 BAPI_J_1BNFSTX_READDATA. 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 BAPI_J_1BNFSTX_READDATA 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_BAPI_J_1BNFSTX_READDATA TYPE STANDARD TABLE OF BAPI_J_1BNFSTX_READDATA,
      WA_BAPI_J_1BNFSTX_READDATA TYPE BAPI_J_1BNFSTX_READDATA,
      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: <BAPI_J_1BNFSTX_READDATA> TYPE BAPI_J_1BNFSTX_READDATA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BAPI_J_1BNFSTX_READDATA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BAPI_J_1BNFSTX_READDATA
  INTO TABLE IT_BAPI_J_1BNFSTX_READDATA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPI_J_1BNFSTX_READDATA
*  INTO TABLE @DATA(IT_BAPI_J_1BNFSTX_READDATA2).
*--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_BAPI_J_1BNFSTX_READDATA INDEX 1 INTO DATA(WA_BAPI_J_1BNFSTX_READDATA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BAPI_J_1BNFSTX_READDATA ASSIGNING <BAPI_J_1BNFSTX_READDATA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPI_J_1BNFSTX_READDATA>-MANDT = 1.
<BAPI_J_1BNFSTX_READDATA>-DOCNUM = 1.
<BAPI_J_1BNFSTX_READDATA>-ITMNUM = 1.
<BAPI_J_1BNFSTX_READDATA>-TAXTYP = 1.
<BAPI_J_1BNFSTX_READDATA>-BASE = 1.

ENDLOOP.

LOOP AT IT_BAPI_J_1BNFSTX_READDATA INTO WA_BAPI_J_1BNFSTX_READDATA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPI_J_1BNFSTX_READDATA-RATE, sy-vline,
  WA_BAPI_J_1BNFSTX_READDATA-TAXVAL, sy-vline,
  WA_BAPI_J_1BNFSTX_READDATA-EXCBAS, sy-vline,
  WA_BAPI_J_1BNFSTX_READDATA-OTHBAS, sy-vline,
  WA_BAPI_J_1BNFSTX_READDATA-STATTX, sy-vline,
  WA_BAPI_J_1BNFSTX_READDATA-RECTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPI_J_1BNFSTX_READDATA 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_BAPI_J_1BNFSTX_READDATA 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_BAPI_J_1BNFSTX_READDATA INTO WA_BAPI_J_1BNFSTX_READDATA.


*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 CUNIT, internal->external for field UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_J_1BNFSTX_READDATA-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_J_1BNFSTX_READDATA-UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNIT4DEC
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_J_1BNFSTX_READDATA-UNIT4DEC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_J_1BNFSTX_READDATA-UNIT4DEC.
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_BAPI_J_1BNFSTX_READDATA_STR, 
MANDT TYPE STRING,
DOCNUM TYPE STRING,
ITMNUM TYPE STRING,
TAXTYP TYPE STRING,
BASE TYPE STRING,
RATE TYPE STRING,
TAXVAL TYPE STRING,
EXCBAS TYPE STRING,
OTHBAS TYPE STRING,
STATTX TYPE STRING,
RECTYPE TYPE STRING,
FACTOR TYPE STRING,
UNIT TYPE STRING,
TAX_LOC TYPE STRING,
SERVTYPE_IN TYPE STRING,
SERVTYPE_OUT TYPE STRING,
WITHHOLD TYPE STRING,
TAXINNET TYPE STRING,
WHTCOLLCODE TYPE STRING,
BASERED1 TYPE STRING,
BASERED2 TYPE STRING,
RATE4DEC TYPE STRING,
FACTOR4DEC TYPE STRING,
UNIT4DEC TYPE STRING,
TAXGRP TYPE STRING,
TAXOFF TYPE STRING,
TAXOUTVALUE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPI_J_1BNFSTX_READDATA_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_BAPI_J_1BNFSTX_READDATA_STR-MANDT sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-DOCNUM sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-ITMNUM sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-TAXTYP sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-BASE sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-RATE sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-TAXVAL sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-EXCBAS sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-OTHBAS sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-STATTX sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-RECTYPE sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-FACTOR sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-UNIT sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-TAX_LOC sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-SERVTYPE_IN sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-SERVTYPE_OUT sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-WITHHOLD sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-TAXINNET sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-WHTCOLLCODE sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-BASERED1 sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-BASERED2 sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-RATE4DEC sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-FACTOR4DEC sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-UNIT4DEC sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-TAXGRP sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-TAXOFF sy-vline 
WA_BAPI_J_1BNFSTX_READDATA_STR-TAXOUTVALUE sy-vline      INTO ld_text SEPARATED BY SPACE.

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