ABAP Select data from SAP table VLC_BW_GA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VLC_BW_GA
*  INTO TABLE @DATA(IT_VLC_BW_GA2).
*--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_VLC_BW_GA INDEX 1 INTO DATA(WA_VLC_BW_GA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VLC_BW_GA>-VGUID = 1.
<VLC_BW_GA>-VHCLE = 1.
<VLC_BW_GA>-MATNR = 1.
<VLC_BW_GA>-LIFNR = 1.
<VLC_BW_GA>-EQUNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VLC_BW_GA-WERKS, sy-vline,
  WA_VLC_BW_GA-LGORT, sy-vline,
  WA_VLC_BW_GA-MMCTR, sy-vline,
  WA_VLC_BW_GA-MMSTA, sy-vline,
  WA_VLC_BW_GA-MMDSP, sy-vline,
  WA_VLC_BW_GA-SDCTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VLC_BW_GA 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_VLC_BW_GA 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_VLC_BW_GA INTO WA_VLC_BW_GA.


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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field VHORD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VLC_BW_GA-VHORD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VLC_BW_GA-VHORD.
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_VLC_BW_GA_STR, 
VGUID TYPE STRING,
VHCLE TYPE STRING,
MATNR TYPE STRING,
LIFNR TYPE STRING,
EQUNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
MMCTR TYPE STRING,
MMSTA TYPE STRING,
MMDSP TYPE STRING,
SDCTR TYPE STRING,
SDSTA TYPE STRING,
SDDSP TYPE STRING,
KUNNR TYPE STRING,
ENDCU TYPE STRING,
VHVIN TYPE STRING,
VHCEX TYPE STRING,
AVAIL TYPE STRING,
VBLTY TYPE STRING,
LOCTN TYPE STRING,
GPRICE TYPE STRING,
GPRICECUKY TYPE STRING,
PSDSP TYPE STRING,
PDDSP TYPE STRING,
ERNAM TYPE STRING,
VHUSG TYPE STRING,
CMPGN TYPE STRING,
IMMATDATE TYPE STRING,
CSTRYEAR TYPE STRING,
CSTRMONTH TYPE STRING,
VHSAR TYPE STRING,
VHORD TYPE STRING,
SHLVL TYPE STRING,
UPDMOD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VLC_BW_GA_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_VLC_BW_GA_STR-VGUID sy-vline 
WA_VLC_BW_GA_STR-VHCLE sy-vline 
WA_VLC_BW_GA_STR-MATNR sy-vline 
WA_VLC_BW_GA_STR-LIFNR sy-vline 
WA_VLC_BW_GA_STR-EQUNR sy-vline 
WA_VLC_BW_GA_STR-WERKS sy-vline 
WA_VLC_BW_GA_STR-LGORT sy-vline 
WA_VLC_BW_GA_STR-MMCTR sy-vline 
WA_VLC_BW_GA_STR-MMSTA sy-vline 
WA_VLC_BW_GA_STR-MMDSP sy-vline 
WA_VLC_BW_GA_STR-SDCTR sy-vline 
WA_VLC_BW_GA_STR-SDSTA sy-vline 
WA_VLC_BW_GA_STR-SDDSP sy-vline 
WA_VLC_BW_GA_STR-KUNNR sy-vline 
WA_VLC_BW_GA_STR-ENDCU sy-vline 
WA_VLC_BW_GA_STR-VHVIN sy-vline 
WA_VLC_BW_GA_STR-VHCEX sy-vline 
WA_VLC_BW_GA_STR-AVAIL sy-vline 
WA_VLC_BW_GA_STR-VBLTY sy-vline 
WA_VLC_BW_GA_STR-LOCTN sy-vline 
WA_VLC_BW_GA_STR-GPRICE sy-vline 
WA_VLC_BW_GA_STR-GPRICECUKY sy-vline 
WA_VLC_BW_GA_STR-PSDSP sy-vline 
WA_VLC_BW_GA_STR-PDDSP sy-vline 
WA_VLC_BW_GA_STR-ERNAM sy-vline 
WA_VLC_BW_GA_STR-VHUSG sy-vline 
WA_VLC_BW_GA_STR-CMPGN sy-vline 
WA_VLC_BW_GA_STR-IMMATDATE sy-vline 
WA_VLC_BW_GA_STR-CSTRYEAR sy-vline 
WA_VLC_BW_GA_STR-CSTRMONTH sy-vline 
WA_VLC_BW_GA_STR-VHSAR sy-vline 
WA_VLC_BW_GA_STR-VHORD sy-vline 
WA_VLC_BW_GA_STR-SHLVL sy-vline 
WA_VLC_BW_GA_STR-UPDMOD sy-vline      INTO ld_text SEPARATED BY SPACE.

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