ABAP Select data from SAP table VLCDISPLALV 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 VLCDISPLALV 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 VLCDISPLALV. 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 VLCDISPLALV 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_VLCDISPLALV TYPE STANDARD TABLE OF VLCDISPLALV,
      WA_VLCDISPLALV TYPE VLCDISPLALV,
      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: <VLCDISPLALV> TYPE VLCDISPLALV.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VLCDISPLALV
*  INTO TABLE @DATA(IT_VLCDISPLALV2).
*--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_VLCDISPLALV INDEX 1 INTO DATA(WA_VLCDISPLALV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VLCDISPLALV>-ACTLED = 1.
<VLCDISPLALV>-VGUID = 1.
<VLCDISPLALV>-VHCLE = 1.
<VLCDISPLALV>-VHCEX = 1.
<VLCDISPLALV>-VHVIN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VLCDISPLALV-AVAIL, sy-vline,
  WA_VLCDISPLALV-AVAILTXT, sy-vline,
  WA_VLCDISPLALV-PSDATU, sy-vline,
  WA_VLCDISPLALV-PSTIME, sy-vline,
  WA_VLCDISPLALV-PDDATU, sy-vline,
  WA_VLCDISPLALV-PDTIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VLCDISPLALV 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_VLCDISPLALV 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_VLCDISPLALV INTO WA_VLCDISPLALV.


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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field KUNNR_BP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VLCDISPLALV-KUNNR_BP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VLCDISPLALV-KUNNR_BP.
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_VLCDISPLALV_STR, 
ACTLED TYPE STRING,
VGUID TYPE STRING,
VHCLE TYPE STRING,
VHCEX TYPE STRING,
VHVIN TYPE STRING,
AVAIL TYPE STRING,
AVAILTXT TYPE STRING,
PSDATU TYPE STRING,
PSTIME TYPE STRING,
PDDATU TYPE STRING,
PDTIME TYPE STRING,
CDDATE TYPE STRING,
CDTIME TYPE STRING,
LOCTN TYPE STRING,
LOCTNCITY TYPE STRING,
LOCTNTXT TYPE STRING,
CONVPRICE TYPE STRING,
CONVPRICECUKY TYPE STRING,
VHUSG TYPE STRING,
VHUSGTXT TYPE STRING,
CMPGN TYPE STRING,
CMPGNTXT TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
MATNR TYPE STRING,
MATNRTXT TYPE STRING,
LIFNR TYPE STRING,
SU_NAME1 TYPE STRING,
KUNNR TYPE STRING,
CU_NAME1 TYPE STRING,
ENDCU TYPE STRING,
ENDCUHANDLE TYPE STRING,
CUOBJ TYPE STRING,
MMCTR TYPE STRING,
MMCTRTXT TYPE STRING,
MMSTA TYPE STRING,
MMSTATXT TYPE STRING,
MMDATU TYPE STRING,
MMTIME TYPE STRING,
SDCTR TYPE STRING,
SDCTRTXT TYPE STRING,
SDSTA TYPE STRING,
SDSTATXT TYPE STRING,
SDDATU TYPE STRING,
SDTIME TYPE STRING,
CHARAC1 TYPE STRING,
CHARAC2 TYPE STRING,
CHARAC3 TYPE STRING,
CHARAC4 TYPE STRING,
CHARAC5 TYPE STRING,
CHARAC6 TYPE STRING,
VBLTY TYPE STRING,
VBLTYTXT TYPE STRING,
SHLVL TYPE STRING,
SHLVL_TXT TYPE STRING,
VHSAR TYPE STRING,
VHSARTXT TYPE STRING,
ERNAM TYPE STRING,
PCOUNT TYPE STRING,
PCOUNT_U TYPE STRING,
IMMATDATE TYPE STRING,
CSTRYEAR TYPE STRING,
CSTRMONTH TYPE STRING,
XERROR TYPE STRING,
LIFNR_BP TYPE STRING,
KUNNR_BP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VLCDISPLALV_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_VLCDISPLALV_STR-ACTLED sy-vline 
WA_VLCDISPLALV_STR-VGUID sy-vline 
WA_VLCDISPLALV_STR-VHCLE sy-vline 
WA_VLCDISPLALV_STR-VHCEX sy-vline 
WA_VLCDISPLALV_STR-VHVIN sy-vline 
WA_VLCDISPLALV_STR-AVAIL sy-vline 
WA_VLCDISPLALV_STR-AVAILTXT sy-vline 
WA_VLCDISPLALV_STR-PSDATU sy-vline 
WA_VLCDISPLALV_STR-PSTIME sy-vline 
WA_VLCDISPLALV_STR-PDDATU sy-vline 
WA_VLCDISPLALV_STR-PDTIME sy-vline 
WA_VLCDISPLALV_STR-CDDATE sy-vline 
WA_VLCDISPLALV_STR-CDTIME sy-vline 
WA_VLCDISPLALV_STR-LOCTN sy-vline 
WA_VLCDISPLALV_STR-LOCTNCITY sy-vline 
WA_VLCDISPLALV_STR-LOCTNTXT sy-vline 
WA_VLCDISPLALV_STR-CONVPRICE sy-vline 
WA_VLCDISPLALV_STR-CONVPRICECUKY sy-vline 
WA_VLCDISPLALV_STR-VHUSG sy-vline 
WA_VLCDISPLALV_STR-VHUSGTXT sy-vline 
WA_VLCDISPLALV_STR-CMPGN sy-vline 
WA_VLCDISPLALV_STR-CMPGNTXT sy-vline 
WA_VLCDISPLALV_STR-WERKS sy-vline 
WA_VLCDISPLALV_STR-LGORT sy-vline 
WA_VLCDISPLALV_STR-MATNR sy-vline 
WA_VLCDISPLALV_STR-MATNRTXT sy-vline 
WA_VLCDISPLALV_STR-LIFNR sy-vline 
WA_VLCDISPLALV_STR-SU_NAME1 sy-vline 
WA_VLCDISPLALV_STR-KUNNR sy-vline 
WA_VLCDISPLALV_STR-CU_NAME1 sy-vline 
WA_VLCDISPLALV_STR-ENDCU sy-vline 
WA_VLCDISPLALV_STR-ENDCUHANDLE sy-vline 
WA_VLCDISPLALV_STR-CUOBJ sy-vline 
WA_VLCDISPLALV_STR-MMCTR sy-vline 
WA_VLCDISPLALV_STR-MMCTRTXT sy-vline 
WA_VLCDISPLALV_STR-MMSTA sy-vline 
WA_VLCDISPLALV_STR-MMSTATXT sy-vline 
WA_VLCDISPLALV_STR-MMDATU sy-vline 
WA_VLCDISPLALV_STR-MMTIME sy-vline 
WA_VLCDISPLALV_STR-SDCTR sy-vline 
WA_VLCDISPLALV_STR-SDCTRTXT sy-vline 
WA_VLCDISPLALV_STR-SDSTA sy-vline 
WA_VLCDISPLALV_STR-SDSTATXT sy-vline 
WA_VLCDISPLALV_STR-SDDATU sy-vline 
WA_VLCDISPLALV_STR-SDTIME sy-vline 
WA_VLCDISPLALV_STR-CHARAC1 sy-vline 
WA_VLCDISPLALV_STR-CHARAC2 sy-vline 
WA_VLCDISPLALV_STR-CHARAC3 sy-vline 
WA_VLCDISPLALV_STR-CHARAC4 sy-vline 
WA_VLCDISPLALV_STR-CHARAC5 sy-vline 
WA_VLCDISPLALV_STR-CHARAC6 sy-vline 
WA_VLCDISPLALV_STR-VBLTY sy-vline 
WA_VLCDISPLALV_STR-VBLTYTXT sy-vline 
WA_VLCDISPLALV_STR-SHLVL sy-vline 
WA_VLCDISPLALV_STR-SHLVL_TXT sy-vline 
WA_VLCDISPLALV_STR-VHSAR sy-vline 
WA_VLCDISPLALV_STR-VHSARTXT sy-vline 
WA_VLCDISPLALV_STR-ERNAM sy-vline 
WA_VLCDISPLALV_STR-PCOUNT sy-vline 
WA_VLCDISPLALV_STR-PCOUNT_U sy-vline 
WA_VLCDISPLALV_STR-IMMATDATE sy-vline 
WA_VLCDISPLALV_STR-CSTRYEAR sy-vline 
WA_VLCDISPLALV_STR-CSTRMONTH sy-vline 
WA_VLCDISPLALV_STR-XERROR sy-vline 
WA_VLCDISPLALV_STR-LIFNR_BP sy-vline 
WA_VLCDISPLALV_STR-KUNNR_BP sy-vline      INTO ld_text SEPARATED BY SPACE.

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