ABAP Select data from SAP table IMIL_BASIC_STOCK_LEVEL3_STY into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IMIL_BASIC_STOCK_LEVEL3_STY 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 IMIL_BASIC_STOCK_LEVEL3_STY. 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 IMIL_BASIC_STOCK_LEVEL3_STY 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_IMIL_BASIC_STOCK_LEVEL3_STY TYPE STANDARD TABLE OF IMIL_BASIC_STOCK_LEVEL3_STY,
      WA_IMIL_BASIC_STOCK_LEVEL3_STY TYPE IMIL_BASIC_STOCK_LEVEL3_STY,
      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: <IMIL_BASIC_STOCK_LEVEL3_STY> TYPE IMIL_BASIC_STOCK_LEVEL3_STY.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_IMIL_BASIC_STOCK_LEVEL3_STY.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM IMIL_BASIC_STOCK_LEVEL3_STY
  INTO TABLE IT_IMIL_BASIC_STOCK_LEVEL3_STY.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IMIL_BASIC_STOCK_LEVEL3_STY
*  INTO TABLE @DATA(IT_IMIL_BASIC_STOCK_LEVEL3_STY2).
*--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_IMIL_BASIC_STOCK_LEVEL3_STY INDEX 1 INTO DATA(WA_IMIL_BASIC_STOCK_LEVEL3_STY2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_IMIL_BASIC_STOCK_LEVEL3_STY ASSIGNING <IMIL_BASIC_STOCK_LEVEL3_STY>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IMIL_BASIC_STOCK_LEVEL3_STY>-MATNR = 1.
<IMIL_BASIC_STOCK_LEVEL3_STY>-WERKS = 1.
<IMIL_BASIC_STOCK_LEVEL3_STY>-LGORT = 1.
<IMIL_BASIC_STOCK_LEVEL3_STY>-LABST = 1.
<IMIL_BASIC_STOCK_LEVEL3_STY>-INSME = 1.

ENDLOOP.

LOOP AT IT_IMIL_BASIC_STOCK_LEVEL3_STY INTO WA_IMIL_BASIC_STOCK_LEVEL3_STY.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IMIL_BASIC_STOCK_LEVEL3_STY-EINME, sy-vline,
  WA_IMIL_BASIC_STOCK_LEVEL3_STY-SPEME, sy-vline,
  WA_IMIL_BASIC_STOCK_LEVEL3_STY-RETME, sy-vline,
  WA_IMIL_BASIC_STOCK_LEVEL3_STY-UMLME, sy-vline,
  WA_IMIL_BASIC_STOCK_LEVEL3_STY-MEINS, sy-vline,
  WA_IMIL_BASIC_STOCK_LEVEL3_STY-GEN_MATNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IMIL_BASIC_STOCK_LEVEL3_STY 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_IMIL_BASIC_STOCK_LEVEL3_STY 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_IMIL_BASIC_STOCK_LEVEL3_STY INTO WA_IMIL_BASIC_STOCK_LEVEL3_STY.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_IMIL_BASIC_STOCK_LEVEL3_STY-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMIL_BASIC_STOCK_LEVEL3_STY-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IMIL_BASIC_STOCK_LEVEL3_STY-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMIL_BASIC_STOCK_LEVEL3_STY-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field GEN_MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_IMIL_BASIC_STOCK_LEVEL3_STY-GEN_MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMIL_BASIC_STOCK_LEVEL3_STY-GEN_MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field STRUCT_MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_IMIL_BASIC_STOCK_LEVEL3_STY-STRUCT_MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMIL_BASIC_STOCK_LEVEL3_STY-STRUCT_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_IMIL_BASIC_STOCK_LEVEL3_STY_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
LABST TYPE STRING,
INSME TYPE STRING,
EINME TYPE STRING,
SPEME TYPE STRING,
RETME TYPE STRING,
UMLME TYPE STRING,
MEINS TYPE STRING,
GEN_MATNR TYPE STRING,
STRUCT_MATNR TYPE STRING,
SOURCE_ERP_POS TYPE STRING,
AGGR_LEVEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IMIL_BASIC_STOCK_LEVEL3_STY_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_IMIL_BASIC_STOCK_LEVEL3_STY_STR-MATNR sy-vline 
WA_IMIL_BASIC_STOCK_LEVEL3_STY_STR-WERKS sy-vline 
WA_IMIL_BASIC_STOCK_LEVEL3_STY_STR-LGORT sy-vline 
WA_IMIL_BASIC_STOCK_LEVEL3_STY_STR-LABST sy-vline 
WA_IMIL_BASIC_STOCK_LEVEL3_STY_STR-INSME sy-vline 
WA_IMIL_BASIC_STOCK_LEVEL3_STY_STR-EINME sy-vline 
WA_IMIL_BASIC_STOCK_LEVEL3_STY_STR-SPEME sy-vline 
WA_IMIL_BASIC_STOCK_LEVEL3_STY_STR-RETME sy-vline 
WA_IMIL_BASIC_STOCK_LEVEL3_STY_STR-UMLME sy-vline 
WA_IMIL_BASIC_STOCK_LEVEL3_STY_STR-MEINS sy-vline 
WA_IMIL_BASIC_STOCK_LEVEL3_STY_STR-GEN_MATNR sy-vline 
WA_IMIL_BASIC_STOCK_LEVEL3_STY_STR-STRUCT_MATNR sy-vline 
WA_IMIL_BASIC_STOCK_LEVEL3_STY_STR-SOURCE_ERP_POS sy-vline 
WA_IMIL_BASIC_STOCK_LEVEL3_STY_STR-AGGR_LEVEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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