ABAP Select data from SAP table ETAX_POPUP_FIELDS_C into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ETAX_POPUP_FIELDS_C
*  INTO TABLE @DATA(IT_ETAX_POPUP_FIELDS_C2).
*--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_ETAX_POPUP_FIELDS_C INDEX 1 INTO DATA(WA_ETAX_POPUP_FIELDS_C2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ETAX_POPUP_FIELDS_C>-EXTENSION_FIELD001 = 1.
<ETAX_POPUP_FIELDS_C>-EXTENSION_FIELD002 = 1.
<ETAX_POPUP_FIELDS_C>-EXTENSION_FIELD003 = 1.
<ETAX_POPUP_FIELDS_C>-EXTENSION_FIELD004 = 1.
<ETAX_POPUP_FIELDS_C>-EXTENSION_FIELD005 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ETAX_POPUP_FIELDS_C-EXTENSION_FIELD006, sy-vline,
  WA_ETAX_POPUP_FIELDS_C-EXTENSION_FIELD007, sy-vline,
  WA_ETAX_POPUP_FIELDS_C-EXTENSION_FIELD008, sy-vline,
  WA_ETAX_POPUP_FIELDS_C-EXTENSION_FIELD009, sy-vline,
  WA_ETAX_POPUP_FIELDS_C-EXTENSION_FIELD010, sy-vline,
  WA_ETAX_POPUP_FIELDS_C-EXTENSION_FIELD011, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ETAX_POPUP_FIELDS_C 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_ETAX_POPUP_FIELDS_C 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_ETAX_POPUP_FIELDS_C INTO WA_ETAX_POPUP_FIELDS_C.


*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_ETAX_POPUP_FIELDS_C_STR, 
EXTENSION_FIELD001 TYPE STRING,
EXTENSION_FIELD002 TYPE STRING,
EXTENSION_FIELD003 TYPE STRING,
EXTENSION_FIELD004 TYPE STRING,
EXTENSION_FIELD005 TYPE STRING,
EXTENSION_FIELD006 TYPE STRING,
EXTENSION_FIELD007 TYPE STRING,
EXTENSION_FIELD008 TYPE STRING,
EXTENSION_FIELD009 TYPE STRING,
EXTENSION_FIELD010 TYPE STRING,
EXTENSION_FIELD011 TYPE STRING,
EXTENSION_FIELD012 TYPE STRING,
EXTENSION_FIELD013 TYPE STRING,
EXTENSION_FIELD014 TYPE STRING,
EXTENSION_FIELD015 TYPE STRING,
EXTENSION_FIELD016 TYPE STRING,
EXTENSION_FIELD017 TYPE STRING,
EXTENSION_FIELD018 TYPE STRING,
EXTENSION_FIELD019 TYPE STRING,
EXTENSION_FIELD020 TYPE STRING,
EXTENSION_FIELD021 TYPE STRING,
EXTENSION_FIELD022 TYPE STRING,
EXTENSION_FIELD023 TYPE STRING,
EXTENSION_FIELD024 TYPE STRING,
EXTENSION_FIELD025 TYPE STRING,
EXTENSION_FIELD026 TYPE STRING,
EXTENSION_FIELD027 TYPE STRING,
EXTENSION_FIELD028 TYPE STRING,
EXTENSION_FIELD029 TYPE STRING,
EXTENSION_FIELD030 TYPE STRING,
EXTENSION_FIELD031 TYPE STRING,
EXTENSION_FIELD032 TYPE STRING,
EXTENSION_FIELD033 TYPE STRING,
EXTENSION_FIELD034 TYPE STRING,
EXTENSION_FIELD035 TYPE STRING,
EXTENSION_FIELD036 TYPE STRING,
EXTENSION_FIELD037 TYPE STRING,
EXTENSION_FIELD038 TYPE STRING,
EXTENSION_FIELD039 TYPE STRING,
EXTENSION_FIELD040 TYPE STRING,
EXTENSION_FIELD041 TYPE STRING,
EXTENSION_FIELD042 TYPE STRING,
EXTENSION_FIELD043 TYPE STRING,
EXTENSION_FIELD044 TYPE STRING,
EXTENSION_FIELD045 TYPE STRING,
EXTENSION_FIELD046 TYPE STRING,
EXTENSION_FIELD047 TYPE STRING,
EXTENSION_FIELD048 TYPE STRING,
EXTENSION_FIELD049 TYPE STRING,
EXTENSION_FIELD050 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ETAX_POPUP_FIELDS_C_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_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD001 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD002 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD003 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD004 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD005 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD006 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD007 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD008 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD009 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD010 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD011 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD012 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD013 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD014 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD015 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD016 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD017 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD018 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD019 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD020 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD021 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD022 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD023 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD024 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD025 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD026 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD027 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD028 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD029 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD030 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD031 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD032 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD033 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD034 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD035 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD036 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD037 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD038 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD039 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD040 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD041 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD042 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD043 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD044 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD045 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD046 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD047 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD048 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD049 sy-vline 
WA_ETAX_POPUP_FIELDS_C_STR-EXTENSION_FIELD050 sy-vline      INTO ld_text SEPARATED BY SPACE.

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