ABAP Select data from SAP table VFCLMBSEGLVL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VFCLMBSEGLVL
*  INTO TABLE @DATA(IT_VFCLMBSEGLVL2).
*--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_VFCLMBSEGLVL INDEX 1 INTO DATA(WA_VFCLMBSEGLVL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VFCLMBSEGLVL>-MANDT = 1.
<VFCLMBSEGLVL>-BUKRS = 1.
<VFCLMBSEGLVL>-GJAHR = 1.
<VFCLMBSEGLVL>-BELNR = 1.
<VFCLMBSEGLVL>-BUZEI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VFCLMBSEGLVL-SHKZG, sy-vline,
  WA_VFCLMBSEGLVL-WRBTR, sy-vline,
  WA_VFCLMBSEGLVL-H_WAERS, sy-vline,
  WA_VFCLMBSEGLVL-LQITEM, sy-vline,
  WA_VFCLMBSEGLVL-PRCTR, sy-vline,
  WA_VFCLMBSEGLVL-FQFTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VFCLMBSEGLVL 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_VFCLMBSEGLVL 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_VFCLMBSEGLVL INTO WA_VFCLMBSEGLVL.


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

*Conversion exit AU132, internal->external for field WRBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_VFCLMBSEGLVL-WRBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VFCLMBSEGLVL-WRBTR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field AUGBL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VFCLMBSEGLVL-AUGBL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VFCLMBSEGLVL-AUGBL.
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_VFCLMBSEGLVL_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
GJAHR TYPE STRING,
BELNR TYPE STRING,
BUZEI TYPE STRING,
SHKZG TYPE STRING,
WRBTR TYPE STRING,
H_WAERS TYPE STRING,
LQITEM TYPE STRING,
PRCTR TYPE STRING,
FQFTYPE TYPE STRING,
FDLEV TYPE STRING,
KUNNR TYPE STRING,
LIFNR TYPE STRING,
SEGMENT TYPE STRING,
GSBER TYPE STRING,
MATNR TYPE STRING,
KOSTL TYPE STRING,
HBKID TYPE STRING,
HKTID TYPE STRING,
AUGBL TYPE STRING,
VALUT TYPE STRING,
FLOW_LEVEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VFCLMBSEGLVL_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_VFCLMBSEGLVL_STR-MANDT sy-vline 
WA_VFCLMBSEGLVL_STR-BUKRS sy-vline 
WA_VFCLMBSEGLVL_STR-GJAHR sy-vline 
WA_VFCLMBSEGLVL_STR-BELNR sy-vline 
WA_VFCLMBSEGLVL_STR-BUZEI sy-vline 
WA_VFCLMBSEGLVL_STR-SHKZG sy-vline 
WA_VFCLMBSEGLVL_STR-WRBTR sy-vline 
WA_VFCLMBSEGLVL_STR-H_WAERS sy-vline 
WA_VFCLMBSEGLVL_STR-LQITEM sy-vline 
WA_VFCLMBSEGLVL_STR-PRCTR sy-vline 
WA_VFCLMBSEGLVL_STR-FQFTYPE sy-vline 
WA_VFCLMBSEGLVL_STR-FDLEV sy-vline 
WA_VFCLMBSEGLVL_STR-KUNNR sy-vline 
WA_VFCLMBSEGLVL_STR-LIFNR sy-vline 
WA_VFCLMBSEGLVL_STR-SEGMENT sy-vline 
WA_VFCLMBSEGLVL_STR-GSBER sy-vline 
WA_VFCLMBSEGLVL_STR-MATNR sy-vline 
WA_VFCLMBSEGLVL_STR-KOSTL sy-vline 
WA_VFCLMBSEGLVL_STR-HBKID sy-vline 
WA_VFCLMBSEGLVL_STR-HKTID sy-vline 
WA_VFCLMBSEGLVL_STR-AUGBL sy-vline 
WA_VFCLMBSEGLVL_STR-VALUT sy-vline 
WA_VFCLMBSEGLVL_STR-FLOW_LEVEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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