ABAP Select data from SAP table T334E into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T334E 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 T334E. 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 T334E 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_T334E TYPE STANDARD TABLE OF T334E,
      WA_T334E TYPE T334E,
      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: <T334E> TYPE T334E.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T334E.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T334E
  INTO TABLE IT_T334E.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T334E
*  INTO TABLE @DATA(IT_T334E2).
*--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_T334E INDEX 1 INTO DATA(WA_T334E2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T334E ASSIGNING <T334E>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T334E>-MANDT = 1.
<T334E>-LGNUM = 1.
<T334E>-LGTYP = 1.
<T334E>-LETY0 = 1.
<T334E>-LETY1 = 1.

ENDLOOP.

LOOP AT IT_T334E INTO WA_T334E.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T334E-LETY2, sy-vline,
  WA_T334E-LETY3, sy-vline,
  WA_T334E-LETY4, sy-vline,
  WA_T334E-LETY5, sy-vline,
  WA_T334E-LETY6, sy-vline,
  WA_T334E-LETY7, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T334E 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_T334E 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_T334E INTO WA_T334E.


*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_T334E_STR, 
MANDT TYPE STRING,
LGNUM TYPE STRING,
LGTYP TYPE STRING,
LETY0 TYPE STRING,
LETY1 TYPE STRING,
LETY2 TYPE STRING,
LETY3 TYPE STRING,
LETY4 TYPE STRING,
LETY5 TYPE STRING,
LETY6 TYPE STRING,
LETY7 TYPE STRING,
LETY8 TYPE STRING,
LETY9 TYPE STRING,
LET10 TYPE STRING,
LET11 TYPE STRING,
LET12 TYPE STRING,
LET13 TYPE STRING,
LET14 TYPE STRING,
LET15 TYPE STRING,
LET16 TYPE STRING,
LET17 TYPE STRING,
LET18 TYPE STRING,
LET19 TYPE STRING,
LET20 TYPE STRING,
LET21 TYPE STRING,
LET22 TYPE STRING,
LET23 TYPE STRING,
LET24 TYPE STRING,
LET25 TYPE STRING,
LET26 TYPE STRING,
LET27 TYPE STRING,
LET28 TYPE STRING,
LET29 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T334E_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_T334E_STR-MANDT sy-vline 
WA_T334E_STR-LGNUM sy-vline 
WA_T334E_STR-LGTYP sy-vline 
WA_T334E_STR-LETY0 sy-vline 
WA_T334E_STR-LETY1 sy-vline 
WA_T334E_STR-LETY2 sy-vline 
WA_T334E_STR-LETY3 sy-vline 
WA_T334E_STR-LETY4 sy-vline 
WA_T334E_STR-LETY5 sy-vline 
WA_T334E_STR-LETY6 sy-vline 
WA_T334E_STR-LETY7 sy-vline 
WA_T334E_STR-LETY8 sy-vline 
WA_T334E_STR-LETY9 sy-vline 
WA_T334E_STR-LET10 sy-vline 
WA_T334E_STR-LET11 sy-vline 
WA_T334E_STR-LET12 sy-vline 
WA_T334E_STR-LET13 sy-vline 
WA_T334E_STR-LET14 sy-vline 
WA_T334E_STR-LET15 sy-vline 
WA_T334E_STR-LET16 sy-vline 
WA_T334E_STR-LET17 sy-vline 
WA_T334E_STR-LET18 sy-vline 
WA_T334E_STR-LET19 sy-vline 
WA_T334E_STR-LET20 sy-vline 
WA_T334E_STR-LET21 sy-vline 
WA_T334E_STR-LET22 sy-vline 
WA_T334E_STR-LET23 sy-vline 
WA_T334E_STR-LET24 sy-vline 
WA_T334E_STR-LET25 sy-vline 
WA_T334E_STR-LET26 sy-vline 
WA_T334E_STR-LET27 sy-vline 
WA_T334E_STR-LET28 sy-vline 
WA_T334E_STR-LET29 sy-vline      INTO ld_text SEPARATED BY SPACE.

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