ABAP Select data from SAP table EDOC_IN_IS_TAXINV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EDOC_IN_IS_TAXINV
*  INTO TABLE @DATA(IT_EDOC_IN_IS_TAXINV2).
*--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_EDOC_IN_IS_TAXINV INDEX 1 INTO DATA(WA_EDOC_IN_IS_TAXINV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EDOC_IN_IS_TAXINV>-GSTIN = 1.
<EDOC_IN_IS_TAXINV>-SUPP_GSTIN = 1.
<EDOC_IN_IS_TAXINV>-FP = 1.
<EDOC_IN_IS_TAXINV>-AUTH_OBJECT = 1.
<EDOC_IN_IS_TAXINV>-CPTY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EDOC_IN_IS_TAXINV-REG_TYPE, sy-vline,
  WA_EDOC_IN_IS_TAXINV-CHKSUM, sy-vline,
  WA_EDOC_IN_IS_TAXINV-STATE_CD, sy-vline,
  WA_EDOC_IN_IS_TAXINV-DNUM, sy-vline,
  WA_EDOC_IN_IS_TAXINV-DT, sy-vline,
  WA_EDOC_IN_IS_TAXINV-OREG_TYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EDOC_IN_IS_TAXINV 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_EDOC_IN_IS_TAXINV 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_EDOC_IN_IS_TAXINV INTO WA_EDOC_IN_IS_TAXINV.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_EDOC_IN_IS_TAXINV_STR, 
GSTIN TYPE STRING,
SUPP_GSTIN TYPE STRING,
FP TYPE STRING,
AUTH_OBJECT TYPE STRING,
CPTY TYPE STRING,
REG_TYPE TYPE STRING,
CHKSUM TYPE STRING,
STATE_CD TYPE STRING,
DNUM TYPE STRING,
DT TYPE STRING,
OREG_TYPE TYPE STRING,
OCPTY TYPE STRING,
ODNUM TYPE STRING,
OTDT TYPE STRING,
RCVRSTATE TYPE STRING,
SUPPLIERSTATE TYPE STRING,
ITEMS TYPE STRING,
NUM TYPE STRING,
TY TYPE STRING,
HSN_SC TYPE STRING,
TXVAL TYPE STRING,
IRT TYPE STRING,
IAMT TYPE STRING,
CRT TYPE STRING,
CAMT TYPE STRING,
SRT TYPE STRING,
SAMT TYPE STRING,
CSRT TYPE STRING,
CSAMT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EDOC_IN_IS_TAXINV_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_EDOC_IN_IS_TAXINV_STR-GSTIN sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-SUPP_GSTIN sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-FP sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-AUTH_OBJECT sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-CPTY sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-REG_TYPE sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-CHKSUM sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-STATE_CD sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-DNUM sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-DT sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-OREG_TYPE sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-OCPTY sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-ODNUM sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-OTDT sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-RCVRSTATE sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-SUPPLIERSTATE sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-ITEMS sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-NUM sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-TY sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-HSN_SC sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-TXVAL sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-IRT sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-IAMT sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-CRT sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-CAMT sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-SRT sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-SAMT sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-CSRT sy-vline 
WA_EDOC_IN_IS_TAXINV_STR-CSAMT sy-vline      INTO ld_text SEPARATED BY SPACE.

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