ABAP Select data from SAP table VMDQ_RMDTSEL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VMDQ_RMDTSEL
*  INTO TABLE @DATA(IT_VMDQ_RMDTSEL2).
*--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_VMDQ_RMDTSEL INDEX 1 INTO DATA(WA_VMDQ_RMDTSEL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VMDQ_RMDTSEL>-CLIENT = 1.
<VMDQ_RMDTSEL>-MDQLTYRULEMININGDATASELUUID = 1.
<VMDQ_RMDTSEL>-MDQLTYRULEMININGUUID = 1.
<VMDQ_RMDTSEL>-MDQLTYRULEMININGTBLSELUUID = 1.
<VMDQ_RMDTSEL>-MDQLTYRULEMININGDATASELFLD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VMDQ_RMDTSEL-MDQLTYRULEMININGDATASELFLDLOW, sy-vline,
  WA_VMDQ_RMDTSEL-MDQLTYRULEMININGDATASELFLDHIGH, sy-vline,
  WA_VMDQ_RMDTSEL-MDQLTYRULEMININGDATASELFLDSIGN, sy-vline,
  WA_VMDQ_RMDTSEL-MDQLTYRULEMININGDATASELFLDOPTR, sy-vline,
  WA_VMDQ_RMDTSEL-KZ, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_VMDQ_RMDTSEL 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_VMDQ_RMDTSEL 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_VMDQ_RMDTSEL INTO WA_VMDQ_RMDTSEL.


*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_VMDQ_RMDTSEL_STR, 
CLIENT TYPE STRING,
MDQLTYRULEMININGDATASELUUID TYPE STRING,
MDQLTYRULEMININGUUID TYPE STRING,
MDQLTYRULEMININGTBLSELUUID TYPE STRING,
MDQLTYRULEMININGDATASELFLD TYPE STRING,
MDQLTYRULEMININGDATASELFLDLOW TYPE STRING,
MDQLTYRULEMININGDATASELFLDHIGH TYPE STRING,
MDQLTYRULEMININGDATASELFLDSIGN TYPE STRING,
MDQLTYRULEMININGDATASELFLDOPTR TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VMDQ_RMDTSEL_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_VMDQ_RMDTSEL_STR-CLIENT sy-vline 
WA_VMDQ_RMDTSEL_STR-MDQLTYRULEMININGDATASELUUID sy-vline 
WA_VMDQ_RMDTSEL_STR-MDQLTYRULEMININGUUID sy-vline 
WA_VMDQ_RMDTSEL_STR-MDQLTYRULEMININGTBLSELUUID sy-vline 
WA_VMDQ_RMDTSEL_STR-MDQLTYRULEMININGDATASELFLD sy-vline 
WA_VMDQ_RMDTSEL_STR-MDQLTYRULEMININGDATASELFLDLOW sy-vline 
WA_VMDQ_RMDTSEL_STR-MDQLTYRULEMININGDATASELFLDHIGH sy-vline 
WA_VMDQ_RMDTSEL_STR-MDQLTYRULEMININGDATASELFLDSIGN sy-vline 
WA_VMDQ_RMDTSEL_STR-MDQLTYRULEMININGDATASELFLDOPTR sy-vline 
WA_VMDQ_RMDTSEL_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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