ABAP Select data from SAP table BGCOM_E into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BGCOM_E
*  INTO TABLE @DATA(IT_BGCOM_E2).
*--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_BGCOM_E INDEX 1 INTO DATA(WA_BGCOM_E2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BGCOM_E>-OBJNR = 1.
<BGCOM_E>-OBJKT = 1.
<BGCOM_E>-OBJTX = 1.
<BGCOM_E>-MGANR = 1.
<BGCOM_E>-GAZNA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BGCOM_E-GAZAL, sy-vline,
  WA_BGCOM_E-START_DATE, sy-vline,
  WA_BGCOM_E-START_TIME, sy-vline,
  WA_BGCOM_E-REFER_DATE, sy-vline,
  WA_BGCOM_E-REFER_TIME, sy-vline,
  WA_BGCOM_E-POINT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BGCOM_E 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_BGCOM_E 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_BGCOM_E INTO WA_BGCOM_E.


*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 MGANR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BGCOM_E-MGANR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BGCOM_E-MGANR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit LUNIT, internal->external for field STAND_UNIT
CALL FUNCTION 'CONVERSION_EXIT_LUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BGCOM_E-STAND_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BGCOM_E-STAND_UNIT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit LUNIT, internal->external for field START_UNIT
CALL FUNCTION 'CONVERSION_EXIT_LUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BGCOM_E-START_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BGCOM_E-START_UNIT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field LSTNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_BGCOM_E-LSTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BGCOM_E-LSTNR.
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_BGCOM_E_STR, 
OBJNR TYPE STRING,
OBJKT TYPE STRING,
OBJTX TYPE STRING,
MGANR TYPE STRING,
GAZNA TYPE STRING,
GAZAL TYPE STRING,
START_DATE TYPE STRING,
START_TIME TYPE STRING,
REFER_DATE TYPE STRING,
REFER_TIME TYPE STRING,
POINT TYPE STRING,
MRNGU TYPE STRING,
EXPON TYPE STRING,
DECIM TYPE STRING,
STAND_WE TYPE STRING,
STAND_WI TYPE STRING,
STAND_UNIT TYPE STRING,
STAND_MSE TYPE STRING,
START_WE TYPE STRING,
START_WI TYPE STRING,
START_UNIT TYPE STRING,
START_MSE TYPE STRING,
LSTNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BGCOM_E_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_BGCOM_E_STR-OBJNR sy-vline 
WA_BGCOM_E_STR-OBJKT sy-vline 
WA_BGCOM_E_STR-OBJTX sy-vline 
WA_BGCOM_E_STR-MGANR sy-vline 
WA_BGCOM_E_STR-GAZNA sy-vline 
WA_BGCOM_E_STR-GAZAL sy-vline 
WA_BGCOM_E_STR-START_DATE sy-vline 
WA_BGCOM_E_STR-START_TIME sy-vline 
WA_BGCOM_E_STR-REFER_DATE sy-vline 
WA_BGCOM_E_STR-REFER_TIME sy-vline 
WA_BGCOM_E_STR-POINT sy-vline 
WA_BGCOM_E_STR-MRNGU sy-vline 
WA_BGCOM_E_STR-EXPON sy-vline 
WA_BGCOM_E_STR-DECIM sy-vline 
WA_BGCOM_E_STR-STAND_WE sy-vline 
WA_BGCOM_E_STR-STAND_WI sy-vline 
WA_BGCOM_E_STR-STAND_UNIT sy-vline 
WA_BGCOM_E_STR-STAND_MSE sy-vline 
WA_BGCOM_E_STR-START_WE sy-vline 
WA_BGCOM_E_STR-START_WI sy-vline 
WA_BGCOM_E_STR-START_UNIT sy-vline 
WA_BGCOM_E_STR-START_MSE sy-vline 
WA_BGCOM_E_STR-LSTNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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