ABAP Select data from SAP table LECOMPVB 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 LECOMPVB 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 LECOMPVB. 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 LECOMPVB 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_LECOMPVB TYPE STANDARD TABLE OF LECOMPVB,
      WA_LECOMPVB TYPE LECOMPVB,
      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: <LECOMPVB> TYPE LECOMPVB.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LECOMPVB
*  INTO TABLE @DATA(IT_LECOMPVB2).
*--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_LECOMPVB INDEX 1 INTO DATA(WA_LECOMPVB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LECOMPVB>-MANDT = 1.
<LECOMPVB>-VBELN = 1.
<LECOMPVB>-POSNR = 1.
<LECOMPVB>-LINCT = 1.
<LECOMPVB>-PARENT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LECOMPVB-MATNR, sy-vline,
  WA_LECOMPVB-WERKS, sy-vline,
  WA_LECOMPVB-CHARG, sy-vline,
  WA_LECOMPVB-BWTAR, sy-vline,
  WA_LECOMPVB-ERFME, sy-vline,
  WA_LECOMPVB-ERFMG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LECOMPVB 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_LECOMPVB 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_LECOMPVB INTO WA_LECOMPVB.


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

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

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

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

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

*Conversion exit ABPSP, internal->external for field MAT_PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_LECOMPVB-MAT_PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LECOMPVB-MAT_PSPNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field KMPME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LECOMPVB-KMPME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LECOMPVB-KMPME.
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_LECOMPVB_STR, 
MANDT TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
LINCT TYPE STRING,
PARENT TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
CHARG TYPE STRING,
BWTAR TYPE STRING,
ERFME TYPE STRING,
ERFMG TYPE STRING,
LAGME TYPE STRING,
BDMNG TYPE STRING,
LGORT TYPE STRING,
MAT_KDAUF TYPE STRING,
MAT_KDPOS TYPE STRING,
MAT_PSPNR TYPE STRING,
SHKZG TYPE STRING,
SOBKZ TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERZET TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
AEZET TYPE STRING,
XCHPF TYPE STRING,
XCHAR TYPE STRING,
FMENG TYPE STRING,
SERAIL TYPE STRING,
ANZSN TYPE STRING,
WBSTA TYPE STRING,
WAMNG TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
BASMN TYPE STRING,
BASME TYPE STRING,
KMPMG TYPE STRING,
KMPME TYPE STRING,
SGT_RCAT TYPE STRING,
SGT_SCAT TYPE STRING,
LICHN TYPE STRING,
KDMAT TYPE STRING,
MAKTX TYPE STRING,
OLDINDEX TYPE STRING,
UPDKZ TYPE STRING,
SOURCE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LECOMPVB_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_LECOMPVB_STR-MANDT sy-vline 
WA_LECOMPVB_STR-VBELN sy-vline 
WA_LECOMPVB_STR-POSNR sy-vline 
WA_LECOMPVB_STR-LINCT sy-vline 
WA_LECOMPVB_STR-PARENT sy-vline 
WA_LECOMPVB_STR-MATNR sy-vline 
WA_LECOMPVB_STR-WERKS sy-vline 
WA_LECOMPVB_STR-CHARG sy-vline 
WA_LECOMPVB_STR-BWTAR sy-vline 
WA_LECOMPVB_STR-ERFME sy-vline 
WA_LECOMPVB_STR-ERFMG sy-vline 
WA_LECOMPVB_STR-LAGME sy-vline 
WA_LECOMPVB_STR-BDMNG sy-vline 
WA_LECOMPVB_STR-LGORT sy-vline 
WA_LECOMPVB_STR-MAT_KDAUF sy-vline 
WA_LECOMPVB_STR-MAT_KDPOS sy-vline 
WA_LECOMPVB_STR-MAT_PSPNR sy-vline 
WA_LECOMPVB_STR-SHKZG sy-vline 
WA_LECOMPVB_STR-SOBKZ sy-vline 
WA_LECOMPVB_STR-ERNAM sy-vline 
WA_LECOMPVB_STR-ERDAT sy-vline 
WA_LECOMPVB_STR-ERZET sy-vline 
WA_LECOMPVB_STR-AENAM sy-vline 
WA_LECOMPVB_STR-AEDAT sy-vline 
WA_LECOMPVB_STR-AEZET sy-vline 
WA_LECOMPVB_STR-XCHPF sy-vline 
WA_LECOMPVB_STR-XCHAR sy-vline 
WA_LECOMPVB_STR-FMENG sy-vline 
WA_LECOMPVB_STR-SERAIL sy-vline 
WA_LECOMPVB_STR-ANZSN sy-vline 
WA_LECOMPVB_STR-WBSTA sy-vline 
WA_LECOMPVB_STR-WAMNG sy-vline 
WA_LECOMPVB_STR-EBELN sy-vline 
WA_LECOMPVB_STR-EBELP sy-vline 
WA_LECOMPVB_STR-UMREZ sy-vline 
WA_LECOMPVB_STR-UMREN sy-vline 
WA_LECOMPVB_STR-BASMN sy-vline 
WA_LECOMPVB_STR-BASME sy-vline 
WA_LECOMPVB_STR-KMPMG sy-vline 
WA_LECOMPVB_STR-KMPME sy-vline 
WA_LECOMPVB_STR-SGT_RCAT sy-vline 
WA_LECOMPVB_STR-SGT_SCAT sy-vline 
WA_LECOMPVB_STR-LICHN sy-vline 
WA_LECOMPVB_STR-KDMAT sy-vline 
WA_LECOMPVB_STR-MAKTX sy-vline 
WA_LECOMPVB_STR-OLDINDEX sy-vline 
WA_LECOMPVB_STR-UPDKZ sy-vline 
WA_LECOMPVB_STR-SOURCE sy-vline      INTO ld_text SEPARATED BY SPACE.

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