ABAP Select data from SAP table ALV_S_DTV 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 ALV_S_DTV 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 ALV_S_DTV. 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 ALV_S_DTV 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_ALV_S_DTV TYPE STANDARD TABLE OF ALV_S_DTV,
      WA_ALV_S_DTV TYPE ALV_S_DTV,
      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: <ALV_S_DTV> TYPE ALV_S_DTV.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ALV_S_DTV
*  INTO TABLE @DATA(IT_ALV_S_DTV2).
*--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_ALV_S_DTV INDEX 1 INTO DATA(WA_ALV_S_DTV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ALV_S_DTV>-CHAR = 1.
<ALV_S_DTV>-CHAR_DLC = 1.
<ALV_S_DTV>-STRING = 1.
<ALV_S_DTV>-NUMC = 1.
<ALV_S_DTV>-INT_1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ALV_S_DTV-INT_2, sy-vline,
  WA_ALV_S_DTV-INT_4, sy-vline,
  WA_ALV_S_DTV-DECIMALS, sy-vline,
  WA_ALV_S_DTV-FLOATP, sy-vline,
  WA_ALV_S_DTV-DATUM, sy-vline,
  WA_ALV_S_DTV-ZEIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ALV_S_DTV 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_ALV_S_DTV 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_ALV_S_DTV INTO WA_ALV_S_DTV.


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

*Conversion exit ALV1, internal->external for field CONVEXIT
CALL FUNCTION 'CONVERSION_EXIT_ALV1_OUTPUT'
  EXPORTING
    input =                      WA_ALV_S_DTV-CONVEXIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ALV_S_DTV-CONVEXIT.
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_ALV_S_DTV_STR, 
CHAR TYPE STRING,
CHAR_DLC TYPE STRING,
STRING TYPE STRING,
NUMC TYPE STRING,
INT_1 TYPE STRING,
INT_2 TYPE STRING,
INT_4 TYPE STRING,
DECIMALS TYPE STRING,
FLOATP TYPE STRING,
DATUM TYPE STRING,
ZEIT TYPE STRING,
BETRAG TYPE STRING,
WAERS TYPE STRING,
MENGE TYPE STRING,
MEINH TYPE STRING,
HEX TYPE STRING,
ICON TYPE STRING,
ICON_QINFO TYPE STRING,
SYMBOL TYPE STRING,
ERROR TYPE STRING,
ERROR_MOD TYPE STRING,
CHECKBOX TYPE STRING,
HOTSPOT TYPE STRING,
HOTSP_CELL TYPE STRING,
HOTSP_COL TYPE STRING,
COLORCELL TYPE STRING,
EMPHASIZE TYPE STRING,
DRAGDROP TYPE STRING,
HLINKCOL TYPE STRING,
HLINKCELL TYPE STRING,
EDITCOL TYPE STRING,
EDITCELL TYPE STRING,
BUTTONCOL TYPE STRING,
BUTTONCELL TYPE STRING,
DRDWNCOL TYPE STRING,
DRDWNCELL TYPE STRING,
CONVEXIT TYPE STRING,
EDITMASK TYPE STRING,
ONF1 TYPE STRING,
ONF4 TYPE STRING,
F4_VALUET TYPE STRING,
F4_CHECKT TYPE STRING,
NOF4_COL TYPE STRING,
NOF4_CELL TYPE STRING,
GROUPC_* TYPE STRING,
GROUPC_UL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ALV_S_DTV_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_ALV_S_DTV_STR-CHAR sy-vline 
WA_ALV_S_DTV_STR-CHAR_DLC sy-vline 
WA_ALV_S_DTV_STR-STRING sy-vline 
WA_ALV_S_DTV_STR-NUMC sy-vline 
WA_ALV_S_DTV_STR-INT_1 sy-vline 
WA_ALV_S_DTV_STR-INT_2 sy-vline 
WA_ALV_S_DTV_STR-INT_4 sy-vline 
WA_ALV_S_DTV_STR-DECIMALS sy-vline 
WA_ALV_S_DTV_STR-FLOATP sy-vline 
WA_ALV_S_DTV_STR-DATUM sy-vline 
WA_ALV_S_DTV_STR-ZEIT sy-vline 
WA_ALV_S_DTV_STR-BETRAG sy-vline 
WA_ALV_S_DTV_STR-WAERS sy-vline 
WA_ALV_S_DTV_STR-MENGE sy-vline 
WA_ALV_S_DTV_STR-MEINH sy-vline 
WA_ALV_S_DTV_STR-HEX sy-vline 
WA_ALV_S_DTV_STR-ICON sy-vline 
WA_ALV_S_DTV_STR-ICON_QINFO sy-vline 
WA_ALV_S_DTV_STR-SYMBOL sy-vline 
WA_ALV_S_DTV_STR-ERROR sy-vline 
WA_ALV_S_DTV_STR-ERROR_MOD sy-vline 
WA_ALV_S_DTV_STR-CHECKBOX sy-vline 
WA_ALV_S_DTV_STR-HOTSPOT sy-vline 
WA_ALV_S_DTV_STR-HOTSP_CELL sy-vline 
WA_ALV_S_DTV_STR-HOTSP_COL sy-vline 
WA_ALV_S_DTV_STR-COLORCELL sy-vline 
WA_ALV_S_DTV_STR-EMPHASIZE sy-vline 
WA_ALV_S_DTV_STR-DRAGDROP sy-vline 
WA_ALV_S_DTV_STR-HLINKCOL sy-vline 
WA_ALV_S_DTV_STR-HLINKCELL sy-vline 
WA_ALV_S_DTV_STR-EDITCOL sy-vline 
WA_ALV_S_DTV_STR-EDITCELL sy-vline 
WA_ALV_S_DTV_STR-BUTTONCOL sy-vline 
WA_ALV_S_DTV_STR-BUTTONCELL sy-vline 
WA_ALV_S_DTV_STR-DRDWNCOL sy-vline 
WA_ALV_S_DTV_STR-DRDWNCELL sy-vline 
WA_ALV_S_DTV_STR-CONVEXIT sy-vline 
WA_ALV_S_DTV_STR-EDITMASK sy-vline 
WA_ALV_S_DTV_STR-ONF1 sy-vline 
WA_ALV_S_DTV_STR-ONF4 sy-vline 
WA_ALV_S_DTV_STR-F4_VALUET sy-vline 
WA_ALV_S_DTV_STR-F4_CHECKT sy-vline 
WA_ALV_S_DTV_STR-NOF4_COL sy-vline 
WA_ALV_S_DTV_STR-NOF4_CELL sy-vline 
WA_ALV_S_DTV_STR-GROUPC_* sy-vline 
WA_ALV_S_DTV_STR-GROUPC_UL sy-vline      INTO ld_text SEPARATED BY SPACE.

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