ABAP Select data from SAP table T449V into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T449V 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 T449V. 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 T449V 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_T449V TYPE STANDARD TABLE OF T449V,
      WA_T449V TYPE T449V,
      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: <T449V> TYPE T449V.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T449V.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T449V
  INTO TABLE IT_T449V.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T449V
*  INTO TABLE @DATA(IT_T449V2).
*--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_T449V INDEX 1 INTO DATA(WA_T449V2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T449V ASSIGNING <T449V>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T449V>-MANDT = 1.
<T449V>-UNAME = 1.
<T449V>-MDSHL = 1.
<T449V>-BERR1 = 1.
<T449V>-BERY1 = 1.

ENDLOOP.

LOOP AT IT_T449V INTO WA_T449V.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T449V-BERG1, sy-vline,
  WA_T449V-BERR2, sy-vline,
  WA_T449V-BERY2, sy-vline,
  WA_T449V-BERG2, sy-vline,
  WA_T449V-BERR3, sy-vline,
  WA_T449V-BERY3, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T449V 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_T449V 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_T449V INTO WA_T449V.


*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_T449V_STR, 
MANDT TYPE STRING,
UNAME TYPE STRING,
MDSHL TYPE STRING,
BERR1 TYPE STRING,
BERY1 TYPE STRING,
BERG1 TYPE STRING,
BERR2 TYPE STRING,
BERY2 TYPE STRING,
BERG2 TYPE STRING,
BERR3 TYPE STRING,
BERY3 TYPE STRING,
BERG3 TYPE STRING,
SLKA1 TYPE STRING,
SLKA2 TYPE STRING,
SLKA3 TYPE STRING,
SLKA4 TYPE STRING,
SLKA5 TYPE STRING,
SLKA6 TYPE STRING,
SLKA7 TYPE STRING,
SLKA8 TYPE STRING,
MATGW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T449V_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_T449V_STR-MANDT sy-vline 
WA_T449V_STR-UNAME sy-vline 
WA_T449V_STR-MDSHL sy-vline 
WA_T449V_STR-BERR1 sy-vline 
WA_T449V_STR-BERY1 sy-vline 
WA_T449V_STR-BERG1 sy-vline 
WA_T449V_STR-BERR2 sy-vline 
WA_T449V_STR-BERY2 sy-vline 
WA_T449V_STR-BERG2 sy-vline 
WA_T449V_STR-BERR3 sy-vline 
WA_T449V_STR-BERY3 sy-vline 
WA_T449V_STR-BERG3 sy-vline 
WA_T449V_STR-SLKA1 sy-vline 
WA_T449V_STR-SLKA2 sy-vline 
WA_T449V_STR-SLKA3 sy-vline 
WA_T449V_STR-SLKA4 sy-vline 
WA_T449V_STR-SLKA5 sy-vline 
WA_T449V_STR-SLKA6 sy-vline 
WA_T449V_STR-SLKA7 sy-vline 
WA_T449V_STR-SLKA8 sy-vline 
WA_T449V_STR-MATGW sy-vline      INTO ld_text SEPARATED BY SPACE.

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