ABAP Select data from SAP table BDIMALG2KEY into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BDIMALG2KEY 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 BDIMALG2KEY. 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 BDIMALG2KEY 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_BDIMALG2KEY TYPE STANDARD TABLE OF BDIMALG2KEY,
      WA_BDIMALG2KEY TYPE BDIMALG2KEY,
      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: <BDIMALG2KEY> TYPE BDIMALG2KEY.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BDIMALG2KEY.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BDIMALG2KEY
  INTO TABLE IT_BDIMALG2KEY.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BDIMALG2KEY
*  INTO TABLE @DATA(IT_BDIMALG2KEY2).
*--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_BDIMALG2KEY INDEX 1 INTO DATA(WA_BDIMALG2KEY2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BDIMALG2KEY ASSIGNING <BDIMALG2KEY>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BDIMALG2KEY>-MSGFN = 1.
<BDIMALG2KEY>-MANDT = 1.
<BDIMALG2KEY>-MATNR = 1.
<BDIMALG2KEY>-MEINH = 1.
<BDIMALG2KEY>-LAYGR = 1.

ENDLOOP.

LOOP AT IT_BDIMALG2KEY INTO WA_BDIMALG2KEY.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BDIMALG2KEY-LMNUM, sy-vline,
  WA_BDIMALG2KEY-SORF, sy-vline,
  WA_BDIMALG2KEY-SHELF, sy-vline,
  WA_BDIMALG2KEY-LMVER, sy-vline,
  WA_BDIMALG2KEY-LMVAR, sy-vline,
  WA_BDIMALG2KEY-CHANGE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BDIMALG2KEY 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_BDIMALG2KEY 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_BDIMALG2KEY INTO WA_BDIMALG2KEY.


*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_BDIMALG2KEY-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BDIMALG2KEY-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BDIMALG2KEY-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BDIMALG2KEY-MEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit WLMV, internal->external for field LMVER
CALL FUNCTION 'CONVERSION_EXIT_WLMV_OUTPUT'
  EXPORTING
    input =                      WA_BDIMALG2KEY-LMVER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BDIMALG2KEY-LMVER.
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_BDIMALG2KEY_STR, 
MSGFN TYPE STRING,
MANDT TYPE STRING,
MATNR TYPE STRING,
MEINH TYPE STRING,
LAYGR TYPE STRING,
LMNUM TYPE STRING,
SORF TYPE STRING,
SHELF TYPE STRING,
LMVER TYPE STRING,
LMVAR TYPE STRING,
CHANGE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BDIMALG2KEY_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_BDIMALG2KEY_STR-MSGFN sy-vline 
WA_BDIMALG2KEY_STR-MANDT sy-vline 
WA_BDIMALG2KEY_STR-MATNR sy-vline 
WA_BDIMALG2KEY_STR-MEINH sy-vline 
WA_BDIMALG2KEY_STR-LAYGR sy-vline 
WA_BDIMALG2KEY_STR-LMNUM sy-vline 
WA_BDIMALG2KEY_STR-SORF sy-vline 
WA_BDIMALG2KEY_STR-SHELF sy-vline 
WA_BDIMALG2KEY_STR-LMVER sy-vline 
WA_BDIMALG2KEY_STR-LMVAR sy-vline 
WA_BDIMALG2KEY_STR-CHANGE sy-vline      INTO ld_text SEPARATED BY SPACE.

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