ABAP Select data from SAP table DTEFW into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DTEFW
*  INTO TABLE @DATA(IT_DTEFW2).
*--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_DTEFW INDEX 1 INTO DATA(WA_DTEFW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DTEFW>-MANDT = 1.
<DTEFW>-DTRNU = 1.
<DTEFW>-DTELI = 1.
<DTEFW>-OBJTY = 1.
<DTEFW>-OBJID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DTEFW-KAPID, sy-vline,
  WA_DTEFW-DTDAT, sy-vline,
  WA_DTEFW-SCHNR, sy-vline,
  WA_DTEFW-TEAM, sy-vline,
  WA_DTEFW-DTEH, sy-vline,
  WA_DTEFW-DTDER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DTEFW 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_DTEFW 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_DTEFW INTO WA_DTEFW.


*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.

*Conversion exit CUNIT, internal->external for field DTEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DTEFW-DTEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DTEFW-DTEH.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_DTEFW_STR, 
MANDT TYPE STRING,
DTRNU TYPE STRING,
DTELI TYPE STRING,
OBJTY TYPE STRING,
OBJID TYPE STRING,
KAPID TYPE STRING,
DTDAT TYPE STRING,
SCHNR TYPE STRING,
TEAM TYPE STRING,
DTEH TYPE STRING,
DTDER TYPE STRING,
ANDAT TYPE STRING,
ANLEG TYPE STRING,
AEDAT TYPE STRING,
AENZT TYPE STRING,
AENAM TYPE STRING,
DELTA TYPE STRING,
LTFLAG TYPE STRING,
RFLAG TYPE STRING,
KAPAR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DTEFW_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_DTEFW_STR-MANDT sy-vline 
WA_DTEFW_STR-DTRNU sy-vline 
WA_DTEFW_STR-DTELI sy-vline 
WA_DTEFW_STR-OBJTY sy-vline 
WA_DTEFW_STR-OBJID sy-vline 
WA_DTEFW_STR-KAPID sy-vline 
WA_DTEFW_STR-DTDAT sy-vline 
WA_DTEFW_STR-SCHNR sy-vline 
WA_DTEFW_STR-TEAM sy-vline 
WA_DTEFW_STR-DTEH sy-vline 
WA_DTEFW_STR-DTDER sy-vline 
WA_DTEFW_STR-ANDAT sy-vline 
WA_DTEFW_STR-ANLEG sy-vline 
WA_DTEFW_STR-AEDAT sy-vline 
WA_DTEFW_STR-AENZT sy-vline 
WA_DTEFW_STR-AENAM sy-vline 
WA_DTEFW_STR-DELTA sy-vline 
WA_DTEFW_STR-LTFLAG sy-vline 
WA_DTEFW_STR-RFLAG sy-vline 
WA_DTEFW_STR-KAPAR sy-vline      INTO ld_text SEPARATED BY SPACE.

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