ABAP Select data from SAP table MDMULTLEVDELAY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDMULTLEVDELAY
*  INTO TABLE @DATA(IT_MDMULTLEVDELAY2).
*--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_MDMULTLEVDELAY INDEX 1 INTO DATA(WA_MDMULTLEVDELAY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDMULTLEVDELAY>-MANDT = 1.
<MDMULTLEVDELAY>-DELKZ = 1.
<MDMULTLEVDELAY>-DELNR = 1.
<MDMULTLEVDELAY>-DELPS = 1.
<MDMULTLEVDELAY>-DELET = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDMULTLEVDELAY-DELAY_ICON, sy-vline,
  WA_MDMULTLEVDELAY-DELAY, sy-vline,
  WA_MDMULTLEVDELAY-DELAY_UNIT, sy-vline,
  WA_MDMULTLEVDELAY-BDDAT, sy-vline,
  WA_MDMULTLEVDELAY-MNG01, sy-vline,
  WA_MDMULTLEVDELAY-MEINS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDMULTLEVDELAY 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_MDMULTLEVDELAY 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_MDMULTLEVDELAY INTO WA_MDMULTLEVDELAY.


*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 CUNIT, internal->external for field DELAY_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MDMULTLEVDELAY-DELAY_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDMULTLEVDELAY-DELAY_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MDMULTLEVDELAY-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDMULTLEVDELAY-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MDMULTLEVDELAY-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDMULTLEVDELAY-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MDMULTLEVDELAY-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDMULTLEVDELAY-KUNNR.
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_MDMULTLEVDELAY_STR, 
MANDT TYPE STRING,
DELKZ TYPE STRING,
DELNR TYPE STRING,
DELPS TYPE STRING,
DELET TYPE STRING,
DELAY_ICON TYPE STRING,
DELAY TYPE STRING,
DELAY_UNIT TYPE STRING,
BDDAT TYPE STRING,
MNG01 TYPE STRING,
MEINS TYPE STRING,
RCEKZ TYPE STRING,
RCENR TYPE STRING,
RCEPS TYPE STRING,
RCELT TYPE STRING,
RCDAT TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
BERID TYPE STRING,
DISPO TYPE STRING,
ERDAT TYPE STRING,
EDATU TYPE STRING,
LPRIO TYPE STRING,
KUNNR TYPE STRING,
TIMESTAMP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDMULTLEVDELAY_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_MDMULTLEVDELAY_STR-MANDT sy-vline 
WA_MDMULTLEVDELAY_STR-DELKZ sy-vline 
WA_MDMULTLEVDELAY_STR-DELNR sy-vline 
WA_MDMULTLEVDELAY_STR-DELPS sy-vline 
WA_MDMULTLEVDELAY_STR-DELET sy-vline 
WA_MDMULTLEVDELAY_STR-DELAY_ICON sy-vline 
WA_MDMULTLEVDELAY_STR-DELAY sy-vline 
WA_MDMULTLEVDELAY_STR-DELAY_UNIT sy-vline 
WA_MDMULTLEVDELAY_STR-BDDAT sy-vline 
WA_MDMULTLEVDELAY_STR-MNG01 sy-vline 
WA_MDMULTLEVDELAY_STR-MEINS sy-vline 
WA_MDMULTLEVDELAY_STR-RCEKZ sy-vline 
WA_MDMULTLEVDELAY_STR-RCENR sy-vline 
WA_MDMULTLEVDELAY_STR-RCEPS sy-vline 
WA_MDMULTLEVDELAY_STR-RCELT sy-vline 
WA_MDMULTLEVDELAY_STR-RCDAT sy-vline 
WA_MDMULTLEVDELAY_STR-MATNR sy-vline 
WA_MDMULTLEVDELAY_STR-WERKS sy-vline 
WA_MDMULTLEVDELAY_STR-BERID sy-vline 
WA_MDMULTLEVDELAY_STR-DISPO sy-vline 
WA_MDMULTLEVDELAY_STR-ERDAT sy-vline 
WA_MDMULTLEVDELAY_STR-EDATU sy-vline 
WA_MDMULTLEVDELAY_STR-LPRIO sy-vline 
WA_MDMULTLEVDELAY_STR-KUNNR sy-vline 
WA_MDMULTLEVDELAY_STR-TIMESTAMP sy-vline      INTO ld_text SEPARATED BY SPACE.

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