ABAP Select data from SAP table E3T159L into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E3T159L 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 E3T159L. 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 E3T159L 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_E3T159L TYPE STANDARD TABLE OF E3T159L,
      WA_E3T159L TYPE E3T159L,
      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: <E3T159L> TYPE E3T159L.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E3T159L.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E3T159L
  INTO TABLE IT_E3T159L.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E3T159L
*  INTO TABLE @DATA(IT_E3T159L2).
*--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_E3T159L INDEX 1 INTO DATA(WA_E3T159L2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E3T159L ASSIGNING <E3T159L>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E3T159L>-MSGFN = 1.
<E3T159L>-WERKS = 1.
<E3T159L>-BSTAR = 1.
<E3T159L>-KZCHA = 1.
<E3T159L>-XAMEI = 1.

ENDLOOP.

LOOP AT IT_E3T159L INTO WA_E3T159L.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E3T159L-STLAN, sy-vline,
  WA_E3T159L-XWAOK, sy-vline,
  WA_E3T159L-XLAUT, sy-vline,
  WA_E3T159L-TWAOK, sy-vline,
  WA_E3T159L-TLOEK, sy-vline,
  WA_E3T159L-XELIK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E3T159L 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_E3T159L 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_E3T159L INTO WA_E3T159L.


*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_E3T159L_STR, 
MSGFN TYPE STRING,
WERKS TYPE STRING,
BSTAR TYPE STRING,
KZCHA TYPE STRING,
XAMEI TYPE STRING,
STLAN TYPE STRING,
XWAOK TYPE STRING,
XLAUT TYPE STRING,
TWAOK TYPE STRING,
TLOEK TYPE STRING,
XELIK TYPE STRING,
VGART TYPE STRING,
CAPID TYPE STRING,
XCHVW TYPE STRING,
XCHVA TYPE STRING,
XFHTP TYPE STRING,
XFVER TYPE STRING,
KZXAB TYPE STRING,
XSMNG TYPE STRING,
XSVNG TYPE STRING,
XWMHD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E3T159L_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_E3T159L_STR-MSGFN sy-vline 
WA_E3T159L_STR-WERKS sy-vline 
WA_E3T159L_STR-BSTAR sy-vline 
WA_E3T159L_STR-KZCHA sy-vline 
WA_E3T159L_STR-XAMEI sy-vline 
WA_E3T159L_STR-STLAN sy-vline 
WA_E3T159L_STR-XWAOK sy-vline 
WA_E3T159L_STR-XLAUT sy-vline 
WA_E3T159L_STR-TWAOK sy-vline 
WA_E3T159L_STR-TLOEK sy-vline 
WA_E3T159L_STR-XELIK sy-vline 
WA_E3T159L_STR-VGART sy-vline 
WA_E3T159L_STR-CAPID sy-vline 
WA_E3T159L_STR-XCHVW sy-vline 
WA_E3T159L_STR-XCHVA sy-vline 
WA_E3T159L_STR-XFHTP sy-vline 
WA_E3T159L_STR-XFVER sy-vline 
WA_E3T159L_STR-KZXAB sy-vline 
WA_E3T159L_STR-XSMNG sy-vline 
WA_E3T159L_STR-XSVNG sy-vline 
WA_E3T159L_STR-XWMHD sy-vline      INTO ld_text SEPARATED BY SPACE.

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