ABAP Select data from SAP table DTRESR 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 DTRESR 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 DTRESR. 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 DTRESR 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_DTRESR TYPE STANDARD TABLE OF DTRESR,
      WA_DTRESR TYPE DTRESR,
      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: <DTRESR> TYPE DTRESR.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DTRESR
*  INTO TABLE @DATA(IT_DTRESR2).
*--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_DTRESR INDEX 1 INTO DATA(WA_DTRESR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DTRESR>-WERK = 1.
<DTRESR>-ARBPL = 1.
<DTRESR>-ARBID = 1.
<DTRESR>-OBJTY = 1.
<DTRESR>-RESSOURCE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DTRESR-VERWE, sy-vline,
  WA_DTRESR-KTEXT, sy-vline,
  WA_DTRESR-KAPID, sy-vline,
  WA_DTRESR-KAPAR, sy-vline,
  WA_DTRESR-KATXT, sy-vline,
  WA_DTRESR-TEAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DTRESR 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_DTRESR 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_DTRESR INTO WA_DTRESR.


*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_DTRESR-DTEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DTRESR-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_DTRESR_STR, 
WERK TYPE STRING,
ARBPL TYPE STRING,
ARBID TYPE STRING,
OBJTY TYPE STRING,
RESSOURCE TYPE STRING,
VERWE TYPE STRING,
KTEXT TYPE STRING,
KAPID TYPE STRING,
KAPAR TYPE STRING,
KATXT TYPE STRING,
TEAM TYPE STRING,
DATEFROM TYPE STRING,
DATETO TYPE STRING,
WOCHE TYPE STRING,
WOCHEX TYPE STRING,
DATRG TYPE STRING,
DTDAT TYPE STRING,
WEEKDAY TYPE STRING,
SCHNR TYPE STRING,
DTELI TYPE STRING,
DTELT TYPE STRING,
DTEH TYPE STRING,
DTCTI TYPE STRING,
DTCTT TYPE STRING,
DTDER TYPE STRING,
DTDVO TYPE STRING,
DTDPL TYPE STRING,
DTWEEKSUM TYPE STRING,
MONDAY TYPE STRING,
TUESDAY TYPE STRING,
WEDNESDAY TYPE STRING,
THURSDAY TYPE STRING,
FRIDAY TYPE STRING,
SATURDAY TYPE STRING,
SUNDAY TYPE STRING,
DTMO TYPE STRING,
DTDI TYPE STRING,
DTMI TYPE STRING,
DTDO TYPE STRING,
DTFR TYPE STRING,
DTSA TYPE STRING,
DTSO TYPE STRING,
MARKW TYPE STRING,
MARK TYPE STRING,
LTFLAG TYPE STRING,
REF_WERKS TYPE STRING,
REF_ARBPL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DTRESR_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_DTRESR_STR-WERK sy-vline 
WA_DTRESR_STR-ARBPL sy-vline 
WA_DTRESR_STR-ARBID sy-vline 
WA_DTRESR_STR-OBJTY sy-vline 
WA_DTRESR_STR-RESSOURCE sy-vline 
WA_DTRESR_STR-VERWE sy-vline 
WA_DTRESR_STR-KTEXT sy-vline 
WA_DTRESR_STR-KAPID sy-vline 
WA_DTRESR_STR-KAPAR sy-vline 
WA_DTRESR_STR-KATXT sy-vline 
WA_DTRESR_STR-TEAM sy-vline 
WA_DTRESR_STR-DATEFROM sy-vline 
WA_DTRESR_STR-DATETO sy-vline 
WA_DTRESR_STR-WOCHE sy-vline 
WA_DTRESR_STR-WOCHEX sy-vline 
WA_DTRESR_STR-DATRG sy-vline 
WA_DTRESR_STR-DTDAT sy-vline 
WA_DTRESR_STR-WEEKDAY sy-vline 
WA_DTRESR_STR-SCHNR sy-vline 
WA_DTRESR_STR-DTELI sy-vline 
WA_DTRESR_STR-DTELT sy-vline 
WA_DTRESR_STR-DTEH sy-vline 
WA_DTRESR_STR-DTCTI sy-vline 
WA_DTRESR_STR-DTCTT sy-vline 
WA_DTRESR_STR-DTDER sy-vline 
WA_DTRESR_STR-DTDVO sy-vline 
WA_DTRESR_STR-DTDPL sy-vline 
WA_DTRESR_STR-DTWEEKSUM sy-vline 
WA_DTRESR_STR-MONDAY sy-vline 
WA_DTRESR_STR-TUESDAY sy-vline 
WA_DTRESR_STR-WEDNESDAY sy-vline 
WA_DTRESR_STR-THURSDAY sy-vline 
WA_DTRESR_STR-FRIDAY sy-vline 
WA_DTRESR_STR-SATURDAY sy-vline 
WA_DTRESR_STR-SUNDAY sy-vline 
WA_DTRESR_STR-DTMO sy-vline 
WA_DTRESR_STR-DTDI sy-vline 
WA_DTRESR_STR-DTMI sy-vline 
WA_DTRESR_STR-DTDO sy-vline 
WA_DTRESR_STR-DTFR sy-vline 
WA_DTRESR_STR-DTSA sy-vline 
WA_DTRESR_STR-DTSO sy-vline 
WA_DTRESR_STR-MARKW sy-vline 
WA_DTRESR_STR-MARK sy-vline 
WA_DTRESR_STR-LTFLAG sy-vline 
WA_DTRESR_STR-REF_WERKS sy-vline 
WA_DTRESR_STR-REF_ARBPL sy-vline      INTO ld_text SEPARATED BY SPACE.

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