ABAP Select data from SAP table SLS_MEPO_ITEM_TYPE into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SLS_MEPO_ITEM_TYPE
*  INTO TABLE @DATA(IT_SLS_MEPO_ITEM_TYPE2).
*--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_SLS_MEPO_ITEM_TYPE INDEX 1 INTO DATA(WA_SLS_MEPO_ITEM_TYPE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SLS_MEPO_ITEM_TYPE>-EBELN = 1.
<SLS_MEPO_ITEM_TYPE>-EBELP = 1.
<SLS_MEPO_ITEM_TYPE>-MATNR = 1.
<SLS_MEPO_ITEM_TYPE>-MENGE = 1.
<SLS_MEPO_ITEM_TYPE>-MEINS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SLS_MEPO_ITEM_TYPE-SERVICE_DATA, sy-vline,
  WA_SLS_MEPO_ITEM_TYPE-UPVOR, sy-vline,
  WA_SLS_MEPO_ITEM_TYPE-UPTYP, sy-vline,
  WA_SLS_MEPO_ITEM_TYPE-LOEKZ, sy-vline,
  WA_SLS_MEPO_ITEM_TYPE-MORE_THAN_ONE_SCHED, sy-vline,
  WA_SLS_MEPO_ITEM_TYPE-UPDKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SLS_MEPO_ITEM_TYPE 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_SLS_MEPO_ITEM_TYPE 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_SLS_MEPO_ITEM_TYPE INTO WA_SLS_MEPO_ITEM_TYPE.


*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 ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SLS_MEPO_ITEM_TYPE-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SLS_MEPO_ITEM_TYPE-EBELN.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_SLS_MEPO_ITEM_TYPE-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SLS_MEPO_ITEM_TYPE-MEINS.
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_SLS_MEPO_ITEM_TYPE_STR, 
EBELN TYPE STRING,
EBELP TYPE STRING,
MATNR TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
SERVICE_DATA TYPE STRING,
UPVOR TYPE STRING,
UPTYP TYPE STRING,
LOEKZ TYPE STRING,
MORE_THAN_ONE_SCHED TYPE STRING,
UPDKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SLS_MEPO_ITEM_TYPE_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_SLS_MEPO_ITEM_TYPE_STR-EBELN sy-vline 
WA_SLS_MEPO_ITEM_TYPE_STR-EBELP sy-vline 
WA_SLS_MEPO_ITEM_TYPE_STR-MATNR sy-vline 
WA_SLS_MEPO_ITEM_TYPE_STR-MENGE sy-vline 
WA_SLS_MEPO_ITEM_TYPE_STR-MEINS sy-vline 
WA_SLS_MEPO_ITEM_TYPE_STR-SERVICE_DATA sy-vline 
WA_SLS_MEPO_ITEM_TYPE_STR-UPVOR sy-vline 
WA_SLS_MEPO_ITEM_TYPE_STR-UPTYP sy-vline 
WA_SLS_MEPO_ITEM_TYPE_STR-LOEKZ sy-vline 
WA_SLS_MEPO_ITEM_TYPE_STR-MORE_THAN_ONE_SCHED sy-vline 
WA_SLS_MEPO_ITEM_TYPE_STR-UPDKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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