ABAP Select data from SAP table E1MDSTL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E1MDSTL 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 E1MDSTL. 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 E1MDSTL 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_E1MDSTL TYPE STANDARD TABLE OF E1MDSTL,
      WA_E1MDSTL TYPE E1MDSTL,
      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: <E1MDSTL> TYPE E1MDSTL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E1MDSTL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E1MDSTL
  INTO TABLE IT_E1MDSTL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E1MDSTL
*  INTO TABLE @DATA(IT_E1MDSTL2).
*--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_E1MDSTL INDEX 1 INTO DATA(WA_E1MDSTL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E1MDSTL ASSIGNING <E1MDSTL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E1MDSTL>-MATNR = 1.
<E1MDSTL>-WERKS = 1.
<E1MDSTL>-PLSCN = 1.
<E1MDSTL>-EINME = 1.
<E1MDSTL>-EISBE = 1.

ENDLOOP.

LOOP AT IT_E1MDSTL INTO WA_E1MDSTL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E1MDSTL-INSME, sy-vline,
  WA_E1MDSTL-KEINM, sy-vline,
  WA_E1MDSTL-KINSM, sy-vline,
  WA_E1MDSTL-KLABS, sy-vline,
  WA_E1MDSTL-KSPEM, sy-vline,
  WA_E1MDSTL-LABST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E1MDSTL 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_E1MDSTL 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_E1MDSTL INTO WA_E1MDSTL.


*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 MATN5, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN5_OUTPUT'
  EXPORTING
    input =                      WA_E1MDSTL-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E1MDSTL-MATNR.
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_E1MDSTL_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
PLSCN TYPE STRING,
EINME TYPE STRING,
EISBE TYPE STRING,
INSME TYPE STRING,
KEINM TYPE STRING,
KINSM TYPE STRING,
KLABS TYPE STRING,
KSPEM TYPE STRING,
LABST TYPE STRING,
RETME TYPE STRING,
SPEME TYPE STRING,
TRAME TYPE STRING,
UMLMC TYPE STRING,
MATNR_EXTERNAL TYPE STRING,
MATNR_VERSION TYPE STRING,
MATNR_GUID TYPE STRING,
MATNR_LONG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E1MDSTL_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_E1MDSTL_STR-MATNR sy-vline 
WA_E1MDSTL_STR-WERKS sy-vline 
WA_E1MDSTL_STR-PLSCN sy-vline 
WA_E1MDSTL_STR-EINME sy-vline 
WA_E1MDSTL_STR-EISBE sy-vline 
WA_E1MDSTL_STR-INSME sy-vline 
WA_E1MDSTL_STR-KEINM sy-vline 
WA_E1MDSTL_STR-KINSM sy-vline 
WA_E1MDSTL_STR-KLABS sy-vline 
WA_E1MDSTL_STR-KSPEM sy-vline 
WA_E1MDSTL_STR-LABST sy-vline 
WA_E1MDSTL_STR-RETME sy-vline 
WA_E1MDSTL_STR-SPEME sy-vline 
WA_E1MDSTL_STR-TRAME sy-vline 
WA_E1MDSTL_STR-UMLMC sy-vline 
WA_E1MDSTL_STR-MATNR_EXTERNAL sy-vline 
WA_E1MDSTL_STR-MATNR_VERSION sy-vline 
WA_E1MDSTL_STR-MATNR_GUID sy-vline 
WA_E1MDSTL_STR-MATNR_LONG sy-vline      INTO ld_text SEPARATED BY SPACE.

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