ABAP Select data from SAP table BXCOM_EXT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BXCOM_EXT
*  INTO TABLE @DATA(IT_BXCOM_EXT2).
*--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_BXCOM_EXT INDEX 1 INTO DATA(WA_BXCOM_EXT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BXCOM_EXT>-KAPPL = 1.
<BXCOM_EXT>-KALSM = 1.
<BXCOM_EXT>-KNUMH = 1.
<BXCOM_EXT>-CUOBJ_CH = 1.
<BXCOM_EXT>-SELID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BXCOM_EXT-CUOBJ_CONF, sy-vline,
  WA_BXCOM_EXT-MBDAT, sy-vline,
  WA_BXCOM_EXT-LFDAT, sy-vline,
  WA_BXCOM_EXT-PRREG, sy-vline,
  WA_BXCOM_EXT-CHMDG, sy-vline,
  WA_BXCOM_EXT-NODIA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BXCOM_EXT 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_BXCOM_EXT 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_BXCOM_EXT INTO WA_BXCOM_EXT.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_BXCOM_EXT_STR, 
KAPPL TYPE STRING,
KALSM TYPE STRING,
KNUMH TYPE STRING,
CUOBJ_CH TYPE STRING,
SELID TYPE STRING,
CUOBJ_CONF TYPE STRING,
MBDAT TYPE STRING,
LFDAT TYPE STRING,
PRREG TYPE STRING,
CHMDG TYPE STRING,
NODIA TYPE STRING,
OBJID TYPE STRING,
OBJEC TYPE STRING,
DISPLAY_ONLY TYPE STRING,
MAX_BATCHES TYPE STRING,
COPY_SEL_CRIT TYPE STRING,
OBJEC_LONG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BXCOM_EXT_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_BXCOM_EXT_STR-KAPPL sy-vline 
WA_BXCOM_EXT_STR-KALSM sy-vline 
WA_BXCOM_EXT_STR-KNUMH sy-vline 
WA_BXCOM_EXT_STR-CUOBJ_CH sy-vline 
WA_BXCOM_EXT_STR-SELID sy-vline 
WA_BXCOM_EXT_STR-CUOBJ_CONF sy-vline 
WA_BXCOM_EXT_STR-MBDAT sy-vline 
WA_BXCOM_EXT_STR-LFDAT sy-vline 
WA_BXCOM_EXT_STR-PRREG sy-vline 
WA_BXCOM_EXT_STR-CHMDG sy-vline 
WA_BXCOM_EXT_STR-NODIA sy-vline 
WA_BXCOM_EXT_STR-OBJID sy-vline 
WA_BXCOM_EXT_STR-OBJEC sy-vline 
WA_BXCOM_EXT_STR-DISPLAY_ONLY sy-vline 
WA_BXCOM_EXT_STR-MAX_BATCHES sy-vline 
WA_BXCOM_EXT_STR-COPY_SEL_CRIT sy-vline 
WA_BXCOM_EXT_STR-OBJEC_LONG sy-vline      INTO ld_text SEPARATED BY SPACE.

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