ABAP Select data from SAP table BMCOMP into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BMCOMP 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 BMCOMP. 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 BMCOMP 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_BMCOMP TYPE STANDARD TABLE OF BMCOMP,
      WA_BMCOMP TYPE BMCOMP,
      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: <BMCOMP> TYPE BMCOMP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BMCOMP
*  INTO TABLE @DATA(IT_BMCOMP2).
*--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_BMCOMP INDEX 1 INTO DATA(WA_BMCOMP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BMCOMP>-FCTR_ID = 1.
<BMCOMP>-AS4LOCAL = 1.
<BMCOMP>-FSTUSER = 1.
<BMCOMP>-FSTDATE = 1.
<BMCOMP>-FSTTIME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BMCOMP-LSTUSER, sy-vline,
  WA_BMCOMP-LSTDATE, sy-vline,
  WA_BMCOMP-LSTTIME, sy-vline,
  WA_BMCOMP-RELE, sy-vline,
  WA_BMCOMP-LSTRELE, sy-vline,
  WA_BMCOMP-ARIID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BMCOMP 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_BMCOMP 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_BMCOMP INTO WA_BMCOMP.


*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 RELE, internal->external for field RELE
CALL FUNCTION 'CONVERSION_EXIT_RELE_OUTPUT'
  EXPORTING
    input =                      WA_BMCOMP-RELE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BMCOMP-RELE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit RELE, internal->external for field LSTRELE
CALL FUNCTION 'CONVERSION_EXIT_RELE_OUTPUT'
  EXPORTING
    input =                      WA_BMCOMP-LSTRELE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BMCOMP-LSTRELE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit RELE, internal->external for field RELEASED
CALL FUNCTION 'CONVERSION_EXIT_RELE_OUTPUT'
  EXPORTING
    input =                      WA_BMCOMP-RELEASED
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BMCOMP-RELEASED.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_BMCOMP-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BMCOMP-LANGU.
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_BMCOMP_STR, 
FCTR_ID TYPE STRING,
AS4LOCAL TYPE STRING,
FSTUSER TYPE STRING,
FSTDATE TYPE STRING,
FSTTIME TYPE STRING,
LSTUSER TYPE STRING,
LSTDATE TYPE STRING,
LSTTIME TYPE STRING,
RELE TYPE STRING,
LSTRELE TYPE STRING,
ARIID TYPE STRING,
PS_POSID TYPE STRING,
XREF TYPE STRING,
CUSTASS TYPE STRING,
ALE_AGGR TYPE STRING,
DESKTOP TYPE STRING,
WWW TYPE STRING,
RELEASED TYPE STRING,
INCOMPLETE TYPE STRING,
SYNCH TYPE STRING,
VISIBLE TYPE STRING,
TSTAMP TYPE STRING,
UNAME1 TYPE STRING,
UNAME2 TYPE STRING,
SELECTABLE TYPE STRING,
LANGU TYPE STRING,
NAME TYPE STRING,
TRMAPPL TYPE STRING,
DEVCLASS TYPE STRING,
SRCSYSTEM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BMCOMP_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_BMCOMP_STR-FCTR_ID sy-vline 
WA_BMCOMP_STR-AS4LOCAL sy-vline 
WA_BMCOMP_STR-FSTUSER sy-vline 
WA_BMCOMP_STR-FSTDATE sy-vline 
WA_BMCOMP_STR-FSTTIME sy-vline 
WA_BMCOMP_STR-LSTUSER sy-vline 
WA_BMCOMP_STR-LSTDATE sy-vline 
WA_BMCOMP_STR-LSTTIME sy-vline 
WA_BMCOMP_STR-RELE sy-vline 
WA_BMCOMP_STR-LSTRELE sy-vline 
WA_BMCOMP_STR-ARIID sy-vline 
WA_BMCOMP_STR-PS_POSID sy-vline 
WA_BMCOMP_STR-XREF sy-vline 
WA_BMCOMP_STR-CUSTASS sy-vline 
WA_BMCOMP_STR-ALE_AGGR sy-vline 
WA_BMCOMP_STR-DESKTOP sy-vline 
WA_BMCOMP_STR-WWW sy-vline 
WA_BMCOMP_STR-RELEASED sy-vline 
WA_BMCOMP_STR-INCOMPLETE sy-vline 
WA_BMCOMP_STR-SYNCH sy-vline 
WA_BMCOMP_STR-VISIBLE sy-vline 
WA_BMCOMP_STR-TSTAMP sy-vline 
WA_BMCOMP_STR-UNAME1 sy-vline 
WA_BMCOMP_STR-UNAME2 sy-vline 
WA_BMCOMP_STR-SELECTABLE sy-vline 
WA_BMCOMP_STR-LANGU sy-vline 
WA_BMCOMP_STR-NAME sy-vline 
WA_BMCOMP_STR-TRMAPPL sy-vline 
WA_BMCOMP_STR-DEVCLASS sy-vline 
WA_BMCOMP_STR-SRCSYSTEM sy-vline      INTO ld_text SEPARATED BY SPACE.

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