ABAP Select data from SAP table UMD01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP UMD01 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 UMD01. 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 UMD01 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_UMD01 TYPE STANDARD TABLE OF UMD01,
      WA_UMD01 TYPE UMD01,
      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: <UMD01> TYPE UMD01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_UMD01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM UMD01
  INTO TABLE IT_UMD01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM UMD01
*  INTO TABLE @DATA(IT_UMD012).
*--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_UMD01 INDEX 1 INTO DATA(WA_UMD012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_UMD01 ASSIGNING <UMD01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<UMD01>-MANDT = 1.
<UMD01>-UNAME = 1.
<UMD01>-MDAKT = 1.
<UMD01>-VERSL = 1.
<UMD01>-BANER = 1.

ENDLOOP.

LOOP AT IT_UMD01 INTO WA_UMD01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_UMD01-LIFKZ, sy-vline,
  WA_UMD01-DISER, sy-vline,
  WA_UMD01-PLMOD, sy-vline,
  WA_UMD01-TRMPL, sy-vline,
  WA_UMD01-ANZDL, sy-vline,
  WA_UMD01-ANZLS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_UMD01 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_UMD01 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_UMD01 INTO WA_UMD01.


*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_UMD01_STR, 
MANDT TYPE STRING,
UNAME TYPE STRING,
MDAKT TYPE STRING,
VERSL TYPE STRING,
BANER TYPE STRING,
LIFKZ TYPE STRING,
DISER TYPE STRING,
PLMOD TYPE STRING,
TRMPL TYPE STRING,
ANZDL TYPE STRING,
ANZLS TYPE STRING,
SCVER TYPE STRING,
SCUEB TYPE STRING,
BASCH TYPE STRING,
PASCH TYPE STRING,
INPER TYPE STRING,
WRT05 TYPE STRING,
STYPE TYPE STRING,
PROFL TYPE STRING,
PLALL TYPE STRING,
PARAL TYPE STRING,
INMEM TYPE STRING,
ICMRP TYPE STRING,
FPAKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_UMD01_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_UMD01_STR-MANDT sy-vline 
WA_UMD01_STR-UNAME sy-vline 
WA_UMD01_STR-MDAKT sy-vline 
WA_UMD01_STR-VERSL sy-vline 
WA_UMD01_STR-BANER sy-vline 
WA_UMD01_STR-LIFKZ sy-vline 
WA_UMD01_STR-DISER sy-vline 
WA_UMD01_STR-PLMOD sy-vline 
WA_UMD01_STR-TRMPL sy-vline 
WA_UMD01_STR-ANZDL sy-vline 
WA_UMD01_STR-ANZLS sy-vline 
WA_UMD01_STR-SCVER sy-vline 
WA_UMD01_STR-SCUEB sy-vline 
WA_UMD01_STR-BASCH sy-vline 
WA_UMD01_STR-PASCH sy-vline 
WA_UMD01_STR-INPER sy-vline 
WA_UMD01_STR-WRT05 sy-vline 
WA_UMD01_STR-STYPE sy-vline 
WA_UMD01_STR-PROFL sy-vline 
WA_UMD01_STR-PLALL sy-vline 
WA_UMD01_STR-PARAL sy-vline 
WA_UMD01_STR-INMEM sy-vline 
WA_UMD01_STR-ICMRP sy-vline 
WA_UMD01_STR-FPAKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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