ABAP Select data from SAP table E3TVSTZ into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E3TVSTZ 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 E3TVSTZ. 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 E3TVSTZ 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_E3TVSTZ TYPE STANDARD TABLE OF E3TVSTZ,
      WA_E3TVSTZ TYPE E3TVSTZ,
      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: <E3TVSTZ> TYPE E3TVSTZ.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E3TVSTZ.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E3TVSTZ
  INTO TABLE IT_E3TVSTZ.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E3TVSTZ
*  INTO TABLE @DATA(IT_E3TVSTZ2).
*--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_E3TVSTZ INDEX 1 INTO DATA(WA_E3TVSTZ2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E3TVSTZ ASSIGNING <E3TVSTZ>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E3TVSTZ>-MSGFN = 1.
<E3TVSTZ>-VSBED = 1.
<E3TVSTZ>-LADGR = 1.
<E3TVSTZ>-WERKS = 1.
<E3TVSTZ>-LGORT = 1.

ENDLOOP.

LOOP AT IT_E3TVSTZ INTO WA_E3TVSTZ.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E3TVSTZ-VSTEL, sy-vline,
  WA_E3TVSTZ-VSTE1, sy-vline,
  WA_E3TVSTZ-VSTE2, sy-vline,
  WA_E3TVSTZ-VSTE3, sy-vline,
  WA_E3TVSTZ-VSTE4, sy-vline,
  WA_E3TVSTZ-VSTE5, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E3TVSTZ 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_E3TVSTZ 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_E3TVSTZ INTO WA_E3TVSTZ.


*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_E3TVSTZ_STR, 
MSGFN TYPE STRING,
VSBED TYPE STRING,
LADGR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
VSTEL TYPE STRING,
VSTE1 TYPE STRING,
VSTE2 TYPE STRING,
VSTE3 TYPE STRING,
VSTE4 TYPE STRING,
VSTE5 TYPE STRING,
VSTE6 TYPE STRING,
VSTE7 TYPE STRING,
VSTE8 TYPE STRING,
VSTE9 TYPE STRING,
VSTE10 TYPE STRING,
VSTE11 TYPE STRING,
ERNAM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E3TVSTZ_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_E3TVSTZ_STR-MSGFN sy-vline 
WA_E3TVSTZ_STR-VSBED sy-vline 
WA_E3TVSTZ_STR-LADGR sy-vline 
WA_E3TVSTZ_STR-WERKS sy-vline 
WA_E3TVSTZ_STR-LGORT sy-vline 
WA_E3TVSTZ_STR-VSTEL sy-vline 
WA_E3TVSTZ_STR-VSTE1 sy-vline 
WA_E3TVSTZ_STR-VSTE2 sy-vline 
WA_E3TVSTZ_STR-VSTE3 sy-vline 
WA_E3TVSTZ_STR-VSTE4 sy-vline 
WA_E3TVSTZ_STR-VSTE5 sy-vline 
WA_E3TVSTZ_STR-VSTE6 sy-vline 
WA_E3TVSTZ_STR-VSTE7 sy-vline 
WA_E3TVSTZ_STR-VSTE8 sy-vline 
WA_E3TVSTZ_STR-VSTE9 sy-vline 
WA_E3TVSTZ_STR-VSTE10 sy-vline 
WA_E3TVSTZ_STR-VSTE11 sy-vline 
WA_E3TVSTZ_STR-ERNAM sy-vline      INTO ld_text SEPARATED BY SPACE.

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