ABAP Select data from SAP table LSEG_COM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LSEG_COM
*  INTO TABLE @DATA(IT_LSEG_COM2).
*--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_LSEG_COM INDEX 1 INTO DATA(WA_LSEG_COM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LSEG_COM>-LVBTP = 1.
<LSEG_COM>-LVBNR = 1.
<LSEG_COM>-LVBPS = 1.
<LSEG_COM>-LGNUM = 1.
<LSEG_COM>-MATNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LSEG_COM-WERKS, sy-vline,
  WA_LSEG_COM-LGORT, sy-vline,
  WA_LSEG_COM-CHARG, sy-vline,
  WA_LSEG_COM-BESTQ, sy-vline,
  WA_LSEG_COM-SOBKZ, sy-vline,
  WA_LSEG_COM-SONUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LSEG_COM 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_LSEG_COM 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_LSEG_COM INTO WA_LSEG_COM.


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

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

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

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

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

*Conversion exit CUNIT, internal->external for field GEWEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LSEG_COM-GEWEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LSEG_COM-GEWEI.
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_LSEG_COM_STR, 
LVBTP TYPE STRING,
LVBNR TYPE STRING,
LVBPS TYPE STRING,
LGNUM TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
BESTQ TYPE STRING,
SOBKZ TYPE STRING,
SONUM TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
LGTYP TYPE STRING,
LGPLA TYPE STRING,
KZDYN TYPE STRING,
BWART TYPE STRING,
UMMAT TYPE STRING,
UMWRK TYPE STRING,
UMLGO TYPE STRING,
UMCHA TYPE STRING,
UMBSQ TYPE STRING,
UMSOK TYPE STRING,
USONU TYPE STRING,
BRGEW TYPE STRING,
GEWEI TYPE STRING,
LBELN TYPE STRING,
LBPOS TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,
MSGTY TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
LANUM TYPE STRING,
XHUPF TYPE STRING,
UMXHUPF TYPE STRING,
KNTTP TYPE STRING,
RBLVS TYPE STRING,
KZBEW TYPE STRING,
ERNAM TYPE STRING,
GRUND TYPE STRING,
SGT_SCAT TYPE STRING,
SGT_UMSCAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LSEG_COM_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_LSEG_COM_STR-LVBTP sy-vline 
WA_LSEG_COM_STR-LVBNR sy-vline 
WA_LSEG_COM_STR-LVBPS sy-vline 
WA_LSEG_COM_STR-LGNUM sy-vline 
WA_LSEG_COM_STR-MATNR sy-vline 
WA_LSEG_COM_STR-WERKS sy-vline 
WA_LSEG_COM_STR-LGORT sy-vline 
WA_LSEG_COM_STR-CHARG sy-vline 
WA_LSEG_COM_STR-BESTQ sy-vline 
WA_LSEG_COM_STR-SOBKZ sy-vline 
WA_LSEG_COM_STR-SONUM sy-vline 
WA_LSEG_COM_STR-MENGE sy-vline 
WA_LSEG_COM_STR-MEINS sy-vline 
WA_LSEG_COM_STR-LGTYP sy-vline 
WA_LSEG_COM_STR-LGPLA sy-vline 
WA_LSEG_COM_STR-KZDYN sy-vline 
WA_LSEG_COM_STR-BWART sy-vline 
WA_LSEG_COM_STR-UMMAT sy-vline 
WA_LSEG_COM_STR-UMWRK sy-vline 
WA_LSEG_COM_STR-UMLGO sy-vline 
WA_LSEG_COM_STR-UMCHA sy-vline 
WA_LSEG_COM_STR-UMBSQ sy-vline 
WA_LSEG_COM_STR-UMSOK sy-vline 
WA_LSEG_COM_STR-USONU sy-vline 
WA_LSEG_COM_STR-BRGEW sy-vline 
WA_LSEG_COM_STR-GEWEI sy-vline 
WA_LSEG_COM_STR-LBELN sy-vline 
WA_LSEG_COM_STR-LBPOS sy-vline 
WA_LSEG_COM_STR-MSGID sy-vline 
WA_LSEG_COM_STR-MSGNO sy-vline 
WA_LSEG_COM_STR-MSGTY sy-vline 
WA_LSEG_COM_STR-MSGV1 sy-vline 
WA_LSEG_COM_STR-MSGV2 sy-vline 
WA_LSEG_COM_STR-MSGV3 sy-vline 
WA_LSEG_COM_STR-MSGV4 sy-vline 
WA_LSEG_COM_STR-LANUM sy-vline 
WA_LSEG_COM_STR-XHUPF sy-vline 
WA_LSEG_COM_STR-UMXHUPF sy-vline 
WA_LSEG_COM_STR-KNTTP sy-vline 
WA_LSEG_COM_STR-RBLVS sy-vline 
WA_LSEG_COM_STR-KZBEW sy-vline 
WA_LSEG_COM_STR-ERNAM sy-vline 
WA_LSEG_COM_STR-GRUND sy-vline 
WA_LSEG_COM_STR-SGT_SCAT sy-vline 
WA_LSEG_COM_STR-SGT_UMSCAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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