ABAP Select data from SAP table J_3R_TTAX_DECL_DME_HEADER into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_3R_TTAX_DECL_DME_HEADER 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_3R_TTAX_DECL_DME_HEADER. 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_3R_TTAX_DECL_DME_HEADER 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_3R_TTAX_DECL_DME_HEADER TYPE STANDARD TABLE OF J_3R_TTAX_DECL_DME_HEADER,
      WA_J_3R_TTAX_DECL_DME_HEADER TYPE J_3R_TTAX_DECL_DME_HEADER,
      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_3R_TTAX_DECL_DME_HEADER> TYPE J_3R_TTAX_DECL_DME_HEADER.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_3R_TTAX_DECL_DME_HEADER.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_3R_TTAX_DECL_DME_HEADER
  INTO TABLE IT_J_3R_TTAX_DECL_DME_HEADER.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_3R_TTAX_DECL_DME_HEADER
*  INTO TABLE @DATA(IT_J_3R_TTAX_DECL_DME_HEADER2).
*--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_3R_TTAX_DECL_DME_HEADER INDEX 1 INTO DATA(WA_J_3R_TTAX_DECL_DME_HEADER2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_3R_TTAX_DECL_DME_HEADER ASSIGNING <J_3R_TTAX_DECL_DME_HEADER>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_3R_TTAX_DECL_DME_HEADER>-BUKRS = 1.
<J_3R_TTAX_DECL_DME_HEADER>-OKATO = 1.
<J_3R_TTAX_DECL_DME_HEADER>-KBK = 1.
<J_3R_TTAX_DECL_DME_HEADER>-TAX_PER = 1.
<J_3R_TTAX_DECL_DME_HEADER>-TAX_YEAR = 1.

ENDLOOP.

LOOP AT IT_J_3R_TTAX_DECL_DME_HEADER INTO WA_J_3R_TTAX_DECL_DME_HEADER.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_3R_TTAX_DECL_DME_HEADER-CR_DATE, sy-vline,
  WA_J_3R_TTAX_DECL_DME_HEADER-DOC_NUM, sy-vline,
  WA_J_3R_TTAX_DECL_DME_HEADER-TAX_INSP_CODE, sy-vline,
  WA_J_3R_TTAX_DECL_DME_HEADER-E_MAIL, sy-vline,
  WA_J_3R_TTAX_DECL_DME_HEADER-JOB, sy-vline,
  WA_J_3R_TTAX_DECL_DME_HEADER-SEND_SURNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_3R_TTAX_DECL_DME_HEADER 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_3R_TTAX_DECL_DME_HEADER 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_3R_TTAX_DECL_DME_HEADER INTO WA_J_3R_TTAX_DECL_DME_HEADER.


*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_J_3R_TTAX_DECL_DME_HEADER_STR, 
BUKRS TYPE STRING,
OKATO TYPE STRING,
KBK TYPE STRING,
TAX_PER TYPE STRING,
TAX_YEAR TYPE STRING,
CR_DATE TYPE STRING,
DOC_NUM TYPE STRING,
TAX_INSP_CODE TYPE STRING,
E_MAIL TYPE STRING,
JOB TYPE STRING,
SEND_SURNAME TYPE STRING,
SEND_NAME TYPE STRING,
SEND_PATR TYPE STRING,
REP_NAME TYPE STRING,
REP_INN TYPE STRING,
CORR_NUM TYPE STRING,
DOC_ATTR TYPE STRING,
DOC_TYPE TYPE STRING,
OKVED_CODE TYPE STRING,
REP_YEAR TYPE STRING,
CEO_SURNAME TYPE STRING,
CEO_NAME TYPE STRING,
CEO_PATR TYPE STRING,
LOCATION TYPE STRING,
DECL_BY TYPE STRING,
REPR_DOC_NAME TYPE STRING,
TAXPAYER_ORG TYPE STRING,
KPP TYPE STRING,
REORGANIZATION TYPE STRING,
REORGINN TYPE STRING,
REORGKPP TYPE STRING,
SIGN_DATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_3R_TTAX_DECL_DME_HEADER_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_3R_TTAX_DECL_DME_HEADER_STR-BUKRS sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-OKATO sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-KBK sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-TAX_PER sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-TAX_YEAR sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-CR_DATE sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-DOC_NUM sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-TAX_INSP_CODE sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-E_MAIL sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-JOB sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-SEND_SURNAME sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-SEND_NAME sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-SEND_PATR sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-REP_NAME sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-REP_INN sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-CORR_NUM sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-DOC_ATTR sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-DOC_TYPE sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-OKVED_CODE sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-REP_YEAR sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-CEO_SURNAME sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-CEO_NAME sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-CEO_PATR sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-LOCATION sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-DECL_BY sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-REPR_DOC_NAME sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-TAXPAYER_ORG sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-KPP sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-REORGANIZATION sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-REORGINN sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-REORGKPP sy-vline 
WA_J_3R_TTAX_DECL_DME_HEADER_STR-SIGN_DATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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