ABAP Select data from SAP table BAPI_RE_TAX_CORR_BASE_INTC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BAPI_RE_TAX_CORR_BASE_INTC 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_RE_TAX_CORR_BASE_INTC. 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_RE_TAX_CORR_BASE_INTC 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_RE_TAX_CORR_BASE_INTC TYPE STANDARD TABLE OF BAPI_RE_TAX_CORR_BASE_INTC,
      WA_BAPI_RE_TAX_CORR_BASE_INTC TYPE BAPI_RE_TAX_CORR_BASE_INTC,
      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_RE_TAX_CORR_BASE_INTC> TYPE BAPI_RE_TAX_CORR_BASE_INTC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPI_RE_TAX_CORR_BASE_INTC
*  INTO TABLE @DATA(IT_BAPI_RE_TAX_CORR_BASE_INTC2).
*--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_RE_TAX_CORR_BASE_INTC INDEX 1 INTO DATA(WA_BAPI_RE_TAX_CORR_BASE_INTC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPI_RE_TAX_CORR_BASE_INTC>-CHANGEIND = 1.
<BAPI_RE_TAX_CORR_BASE_INTC>-SEQNO = 1.
<BAPI_RE_TAX_CORR_BASE_INTC>-TAXCODE = 1.
<BAPI_RE_TAX_CORR_BASE_INTC>-BASETYPE = 1.
<BAPI_RE_TAX_CORR_BASE_INTC>-NETAMOUNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPI_RE_TAX_CORR_BASE_INTC-TAXAMOUNT, sy-vline,
  WA_BAPI_RE_TAX_CORR_BASE_INTC-DEDTAXAMT, sy-vline,
  WA_BAPI_RE_TAX_CORR_BASE_INTC-NONDEDTAXAMT, sy-vline,
  WA_BAPI_RE_TAX_CORR_BASE_INTC-CURRENCY, sy-vline,
  WA_BAPI_RE_TAX_CORR_BASE_INTC-RETIREOPTRATE, sy-vline,
  WA_BAPI_RE_TAX_CORR_BASE_INTC-VALIDFROM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPI_RE_TAX_CORR_BASE_INTC 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_RE_TAX_CORR_BASE_INTC 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_RE_TAX_CORR_BASE_INTC INTO WA_BAPI_RE_TAX_CORR_BASE_INTC.


*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 REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_RE_TAX_CORR_BASE_INTC-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_RE_TAX_CORR_BASE_INTC-VALIDTO.
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_RE_TAX_CORR_BASE_INTC_STR, 
CHANGEIND TYPE STRING,
SEQNO TYPE STRING,
TAXCODE TYPE STRING,
BASETYPE TYPE STRING,
NETAMOUNT TYPE STRING,
TAXAMOUNT TYPE STRING,
DEDTAXAMT TYPE STRING,
NONDEDTAXAMT TYPE STRING,
CURRENCY TYPE STRING,
RETIREOPTRATE TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
XTCBASE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPI_RE_TAX_CORR_BASE_INTC_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_RE_TAX_CORR_BASE_INTC_STR-CHANGEIND sy-vline 
WA_BAPI_RE_TAX_CORR_BASE_INTC_STR-SEQNO sy-vline 
WA_BAPI_RE_TAX_CORR_BASE_INTC_STR-TAXCODE sy-vline 
WA_BAPI_RE_TAX_CORR_BASE_INTC_STR-BASETYPE sy-vline 
WA_BAPI_RE_TAX_CORR_BASE_INTC_STR-NETAMOUNT sy-vline 
WA_BAPI_RE_TAX_CORR_BASE_INTC_STR-TAXAMOUNT sy-vline 
WA_BAPI_RE_TAX_CORR_BASE_INTC_STR-DEDTAXAMT sy-vline 
WA_BAPI_RE_TAX_CORR_BASE_INTC_STR-NONDEDTAXAMT sy-vline 
WA_BAPI_RE_TAX_CORR_BASE_INTC_STR-CURRENCY sy-vline 
WA_BAPI_RE_TAX_CORR_BASE_INTC_STR-RETIREOPTRATE sy-vline 
WA_BAPI_RE_TAX_CORR_BASE_INTC_STR-VALIDFROM sy-vline 
WA_BAPI_RE_TAX_CORR_BASE_INTC_STR-VALIDTO sy-vline 
WA_BAPI_RE_TAX_CORR_BASE_INTC_STR-XTCBASE sy-vline      INTO ld_text SEPARATED BY SPACE.

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