ABAP Select data from SAP table CLSTMIRDRTEVST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CLSTMIRDRTEVST
*  INTO TABLE @DATA(IT_CLSTMIRDRTEVST2).
*--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_CLSTMIRDRTEVST INDEX 1 INTO DATA(WA_CLSTMIRDRTEVST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CLSTMIRDRTEVST>-MANDT = 1.
<CLSTMIRDRTEVST>-LASTMILEROUTEVISITUUID = 1.
<CLSTMIRDRTEVST>-LASTMILEROUTEUUID = 1.
<CLSTMIRDRTEVST>-SHIPTOPARTY = 1.
<CLSTMIRDRTEVST>-OUTBOUNDDELIVERY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CLSTMIRDRTEVST-LASTMILEROUTE, sy-vline,
  WA_CLSTMIRDRTEVST-LASTMILEROUTETYPE, sy-vline,
  WA_CLSTMIRDRTEVST-LASTMILEROUTEDEPARTURELOCATION, sy-vline,
  WA_CLSTMIRDRTEVST-TRANSPORDDEPARTUREDATE, sy-vline,
  WA_CLSTMIRDRTEVST-TRANSPORTATIONVEHICLEDRIVER, sy-vline,
  WA_CLSTMIRDRTEVST-LSTMIRTEEXECUTIONORGANIZATION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CLSTMIRDRTEVST 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_CLSTMIRDRTEVST 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_CLSTMIRDRTEVST INTO WA_CLSTMIRDRTEVST.


*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 ALPHA, internal->external for field OUTBOUNDDELIVERY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CLSTMIRDRTEVST-OUTBOUNDDELIVERY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CLSTMIRDRTEVST-OUTBOUNDDELIVERY.
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_CLSTMIRDRTEVST_STR, 
MANDT TYPE STRING,
LASTMILEROUTEVISITUUID TYPE STRING,
LASTMILEROUTEUUID TYPE STRING,
SHIPTOPARTY TYPE STRING,
OUTBOUNDDELIVERY TYPE STRING,
LASTMILEROUTE TYPE STRING,
LASTMILEROUTETYPE TYPE STRING,
LASTMILEROUTEDEPARTURELOCATION TYPE STRING,
TRANSPORDDEPARTUREDATE TYPE STRING,
TRANSPORTATIONVEHICLEDRIVER TYPE STRING,
LSTMIRTEEXECUTIONORGANIZATION TYPE STRING,
LSTMIRTEVISITINCMPLTCRITLTYCOD TYPE STRING,
LSTMIRTEVISITHASINCMPLTDOCS TYPE STRING,
LSTMIRTEDOCCLRDCRITICALITYCODE TYPE STRING,
LSTMIRTEVISITHASNOTCLRDDOCS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CLSTMIRDRTEVST_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_CLSTMIRDRTEVST_STR-MANDT sy-vline 
WA_CLSTMIRDRTEVST_STR-LASTMILEROUTEVISITUUID sy-vline 
WA_CLSTMIRDRTEVST_STR-LASTMILEROUTEUUID sy-vline 
WA_CLSTMIRDRTEVST_STR-SHIPTOPARTY sy-vline 
WA_CLSTMIRDRTEVST_STR-OUTBOUNDDELIVERY sy-vline 
WA_CLSTMIRDRTEVST_STR-LASTMILEROUTE sy-vline 
WA_CLSTMIRDRTEVST_STR-LASTMILEROUTETYPE sy-vline 
WA_CLSTMIRDRTEVST_STR-LASTMILEROUTEDEPARTURELOCATION sy-vline 
WA_CLSTMIRDRTEVST_STR-TRANSPORDDEPARTUREDATE sy-vline 
WA_CLSTMIRDRTEVST_STR-TRANSPORTATIONVEHICLEDRIVER sy-vline 
WA_CLSTMIRDRTEVST_STR-LSTMIRTEEXECUTIONORGANIZATION sy-vline 
WA_CLSTMIRDRTEVST_STR-LSTMIRTEVISITINCMPLTCRITLTYCOD sy-vline 
WA_CLSTMIRDRTEVST_STR-LSTMIRTEVISITHASINCMPLTDOCS sy-vline 
WA_CLSTMIRDRTEVST_STR-LSTMIRTEDOCCLRDCRITICALITYCODE sy-vline 
WA_CLSTMIRDRTEVST_STR-LSTMIRTEVISITHASNOTCLRDDOCS sy-vline      INTO ld_text SEPARATED BY SPACE.

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