ABAP Select data from SAP table MDRP_DRUN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDRP_DRUN
*  INTO TABLE @DATA(IT_MDRP_DRUN2).
*--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_MDRP_DRUN INDEX 1 INTO DATA(WA_MDRP_DRUN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDRP_DRUN>-MANDT = 1.
<MDRP_DRUN>-DRPRUN = 1.
<MDRP_DRUN>-GSTRU = 1.
<MDRP_DRUN>-VRSIO = 1.
<MDRP_DRUN>-DEPRE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDRP_DRUN-DPLHO, sy-vline,
  WA_MDRP_DRUN-DEDPO, sy-vline,
  WA_MDRP_DRUN-CDAT, sy-vline,
  WA_MDRP_DRUN-CTIME, sy-vline,
  WA_MDRP_DRUN-AUTOR, sy-vline,
  WA_MDRP_DRUN-UDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDRP_DRUN 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_MDRP_DRUN 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_MDRP_DRUN INTO WA_MDRP_DRUN.


*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_MDRP_DRUN_STR, 
MANDT TYPE STRING,
DRPRUN TYPE STRING,
GSTRU TYPE STRING,
VRSIO TYPE STRING,
DEPRE TYPE STRING,
DPLHO TYPE STRING,
DEDPO TYPE STRING,
CDAT TYPE STRING,
CTIME TYPE STRING,
AUTOR TYPE STRING,
UDAT TYPE STRING,
UPNAM TYPE STRING,
UTIME TYPE STRING,
VWDAT TYPE STRING,
STATU TYPE STRING,
VETXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDRP_DRUN_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_MDRP_DRUN_STR-MANDT sy-vline 
WA_MDRP_DRUN_STR-DRPRUN sy-vline 
WA_MDRP_DRUN_STR-GSTRU sy-vline 
WA_MDRP_DRUN_STR-VRSIO sy-vline 
WA_MDRP_DRUN_STR-DEPRE sy-vline 
WA_MDRP_DRUN_STR-DPLHO sy-vline 
WA_MDRP_DRUN_STR-DEDPO sy-vline 
WA_MDRP_DRUN_STR-CDAT sy-vline 
WA_MDRP_DRUN_STR-CTIME sy-vline 
WA_MDRP_DRUN_STR-AUTOR sy-vline 
WA_MDRP_DRUN_STR-UDAT sy-vline 
WA_MDRP_DRUN_STR-UPNAM sy-vline 
WA_MDRP_DRUN_STR-UTIME sy-vline 
WA_MDRP_DRUN_STR-VWDAT sy-vline 
WA_MDRP_DRUN_STR-STATU sy-vline 
WA_MDRP_DRUN_STR-VETXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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