ABAP Select data from SAP table T449U into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T449U 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 T449U. 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 T449U 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_T449U TYPE STANDARD TABLE OF T449U,
      WA_T449U TYPE T449U,
      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: <T449U> TYPE T449U.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T449U.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T449U
  INTO TABLE IT_T449U.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T449U
*  INTO TABLE @DATA(IT_T449U2).
*--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_T449U INDEX 1 INTO DATA(WA_T449U2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T449U ASSIGNING <T449U>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T449U>-MANDT = 1.
<T449U>-UNAME = 1.
<T449U>-WERKS = 1.
<T449U>-DISPO = 1.
<T449U>-DTDFV = 1.

ENDLOOP.

LOOP AT IT_T449U INTO WA_T449U.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T449U-DTDFB, sy-vline,
  WA_T449U-BESKZ, sy-vline,
  WA_T449U-SOBSL, sy-vline,
  WA_T449U-SLKZ1, sy-vline,
  WA_T449U-SLKZ2, sy-vline,
  WA_T449U-SLKZ3, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T449U 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_T449U 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_T449U INTO WA_T449U.


*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_T449U_STR, 
MANDT TYPE STRING,
UNAME TYPE STRING,
WERKS TYPE STRING,
DISPO TYPE STRING,
DTDFV TYPE STRING,
DTDFB TYPE STRING,
BESKZ TYPE STRING,
SOBSL TYPE STRING,
SLKZ1 TYPE STRING,
SLKZ2 TYPE STRING,
SLKZ3 TYPE STRING,
SLKZ4 TYPE STRING,
SLKZ5 TYPE STRING,
SLKZ6 TYPE STRING,
SLKZ7 TYPE STRING,
SLKZ8 TYPE STRING,
JBEKZ TYPE STRING,
NBEKZ TYPE STRING,
SCUEB TYPE STRING,
INPER TYPE STRING,
WRT05 TYPE STRING,
BERW1 TYPE STRING,
BERW2 TYPE STRING,
SMEKZ TYPE STRING,
NAUKZ TYPE STRING,
DTDBV TYPE STRING,
DTDBB TYPE STRING,
MRPPP TYPE STRING,
PRAST TYPE STRING,
MAABC TYPE STRING,
KDSRT TYPE STRING,
BERID TYPE STRING,
DBRKZ TYPE STRING,
BERW4 TYPE STRING,
WZFLG TYPE STRING,
MTREE TYPE STRING,
ATREE TYPE STRING,
BEDVL TYPE STRING,
VRFWE TYPE STRING,
NAVPR TYPE STRING,
DFILT TYPE STRING,
PRREG TYPE STRING,
ERGBZ TYPE STRING,
FILBZ TYPE STRING,
SBZKZ TYPE STRING,
ADBKZ TYPE STRING,
DTLFV TYPE STRING,
DTLFB TYPE STRING,
MEMFL TYPE STRING,
DISMM TYPE STRING,
MTRPO TYPE STRING,
MTRSZ TYPE STRING,
ORDPR TYPE STRING,
MTART TYPE STRING,
MDATS TYPE STRING,
MDNVM TYPE STRING,
MDKUM TYPE STRING,
MDSEPDB TYPE STRING,
BERWV1 TYPE STRING,
BERWV2 TYPE STRING,
BERWV4 TYPE STRING,
MMSTA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T449U_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_T449U_STR-MANDT sy-vline 
WA_T449U_STR-UNAME sy-vline 
WA_T449U_STR-WERKS sy-vline 
WA_T449U_STR-DISPO sy-vline 
WA_T449U_STR-DTDFV sy-vline 
WA_T449U_STR-DTDFB sy-vline 
WA_T449U_STR-BESKZ sy-vline 
WA_T449U_STR-SOBSL sy-vline 
WA_T449U_STR-SLKZ1 sy-vline 
WA_T449U_STR-SLKZ2 sy-vline 
WA_T449U_STR-SLKZ3 sy-vline 
WA_T449U_STR-SLKZ4 sy-vline 
WA_T449U_STR-SLKZ5 sy-vline 
WA_T449U_STR-SLKZ6 sy-vline 
WA_T449U_STR-SLKZ7 sy-vline 
WA_T449U_STR-SLKZ8 sy-vline 
WA_T449U_STR-JBEKZ sy-vline 
WA_T449U_STR-NBEKZ sy-vline 
WA_T449U_STR-SCUEB sy-vline 
WA_T449U_STR-INPER sy-vline 
WA_T449U_STR-WRT05 sy-vline 
WA_T449U_STR-BERW1 sy-vline 
WA_T449U_STR-BERW2 sy-vline 
WA_T449U_STR-SMEKZ sy-vline 
WA_T449U_STR-NAUKZ sy-vline 
WA_T449U_STR-DTDBV sy-vline 
WA_T449U_STR-DTDBB sy-vline 
WA_T449U_STR-MRPPP sy-vline 
WA_T449U_STR-PRAST sy-vline 
WA_T449U_STR-MAABC sy-vline 
WA_T449U_STR-KDSRT sy-vline 
WA_T449U_STR-BERID sy-vline 
WA_T449U_STR-DBRKZ sy-vline 
WA_T449U_STR-BERW4 sy-vline 
WA_T449U_STR-WZFLG sy-vline 
WA_T449U_STR-MTREE sy-vline 
WA_T449U_STR-ATREE sy-vline 
WA_T449U_STR-BEDVL sy-vline 
WA_T449U_STR-VRFWE sy-vline 
WA_T449U_STR-NAVPR sy-vline 
WA_T449U_STR-DFILT sy-vline 
WA_T449U_STR-PRREG sy-vline 
WA_T449U_STR-ERGBZ sy-vline 
WA_T449U_STR-FILBZ sy-vline 
WA_T449U_STR-SBZKZ sy-vline 
WA_T449U_STR-ADBKZ sy-vline 
WA_T449U_STR-DTLFV sy-vline 
WA_T449U_STR-DTLFB sy-vline 
WA_T449U_STR-MEMFL sy-vline 
WA_T449U_STR-DISMM sy-vline 
WA_T449U_STR-MTRPO sy-vline 
WA_T449U_STR-MTRSZ sy-vline 
WA_T449U_STR-ORDPR sy-vline 
WA_T449U_STR-MTART sy-vline 
WA_T449U_STR-MDATS sy-vline 
WA_T449U_STR-MDNVM sy-vline 
WA_T449U_STR-MDKUM sy-vline 
WA_T449U_STR-MDSEPDB sy-vline 
WA_T449U_STR-BERWV1 sy-vline 
WA_T449U_STR-BERWV2 sy-vline 
WA_T449U_STR-BERWV4 sy-vline 
WA_T449U_STR-MMSTA sy-vline      INTO ld_text SEPARATED BY SPACE.

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