ABAP Select data from SAP table DOUI_ELEM_ALV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DOUI_ELEM_ALV
*  INTO TABLE @DATA(IT_DOUI_ELEM_ALV2).
*--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_DOUI_ELEM_ALV INDEX 1 INTO DATA(WA_DOUI_ELEM_ALV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DOUI_ELEM_ALV>-DOCM_VERSION = 1.
<DOUI_ELEM_ALV>-ENV_ID = 1.
<DOUI_ELEM_ALV>-SCREEN_ID = 1.
<DOUI_ELEM_ALV>-ELEM_ID = 1.
<DOUI_ELEM_ALV>-ZEBRA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DOUI_ELEM_ALV-SMALLTITLE, sy-vline,
  WA_DOUI_ELEM_ALV-HORIZONTAL_GRID_VISIBLE, sy-vline,
  WA_DOUI_ELEM_ALV-VERTICAL_GRID_VISIBLE, sy-vline,
  WA_DOUI_ELEM_ALV-HEADERS_VISIBLE, sy-vline,
  WA_DOUI_ELEM_ALV-MERGING_ENABLED, sy-vline,
  WA_DOUI_ELEM_ALV-OPTIMIZED_COLUMN_WIDTH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DOUI_ELEM_ALV 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_DOUI_ELEM_ALV 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_DOUI_ELEM_ALV INTO WA_DOUI_ELEM_ALV.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_DOUI_ELEM_ALV_STR, 
DOCM_VERSION TYPE STRING,
ENV_ID TYPE STRING,
SCREEN_ID TYPE STRING,
ELEM_ID TYPE STRING,
ZEBRA TYPE STRING,
SMALLTITLE TYPE STRING,
HORIZONTAL_GRID_VISIBLE TYPE STRING,
VERTICAL_GRID_VISIBLE TYPE STRING,
HEADERS_VISIBLE TYPE STRING,
MERGING_ENABLED TYPE STRING,
OPTIMIZED_COLUMN_WIDTH TYPE STRING,
ROWMOVE_ENABLED TYPE STRING,
ROWINS_ENABLED TYPE STRING,
ROWMARK_VISIBLE TYPE STRING,
TOOLBAR_VISIBLE TYPE STRING,
SELECTION_MODE TYPE STRING,
ROW_COLOR_FIELD TYPE STRING,
FILTER_ENABLED TYPE STRING,
LIST_VIEW_ENABLED TYPE STRING,
CONFIGURATION_ENABLED TYPE STRING,
EXPORT_ENABLED TYPE STRING,
SORT_ENABLED TYPE STRING,
EMPTY_TABLE_TEXT TYPE STRING,
STD_DETAIL_ENABLED TYPE STRING,
TITLE_VISIBLE TYPE STRING,
DOCM_CHANGE_CMD TYPE STRING,
DOCM_CHANGED_AT TYPE STRING,
DOCM_CHANGED_BY TYPE STRING,
DOCM_PROG_INCLUDE TYPE STRING,
DOCM_PROG_LINE TYPE STRING,
DOCM_MAKE_SCENARIO TYPE STRING,
DOCM_BUILD_DOCUMENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DOUI_ELEM_ALV_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_DOUI_ELEM_ALV_STR-DOCM_VERSION sy-vline 
WA_DOUI_ELEM_ALV_STR-ENV_ID sy-vline 
WA_DOUI_ELEM_ALV_STR-SCREEN_ID sy-vline 
WA_DOUI_ELEM_ALV_STR-ELEM_ID sy-vline 
WA_DOUI_ELEM_ALV_STR-ZEBRA sy-vline 
WA_DOUI_ELEM_ALV_STR-SMALLTITLE sy-vline 
WA_DOUI_ELEM_ALV_STR-HORIZONTAL_GRID_VISIBLE sy-vline 
WA_DOUI_ELEM_ALV_STR-VERTICAL_GRID_VISIBLE sy-vline 
WA_DOUI_ELEM_ALV_STR-HEADERS_VISIBLE sy-vline 
WA_DOUI_ELEM_ALV_STR-MERGING_ENABLED sy-vline 
WA_DOUI_ELEM_ALV_STR-OPTIMIZED_COLUMN_WIDTH sy-vline 
WA_DOUI_ELEM_ALV_STR-ROWMOVE_ENABLED sy-vline 
WA_DOUI_ELEM_ALV_STR-ROWINS_ENABLED sy-vline 
WA_DOUI_ELEM_ALV_STR-ROWMARK_VISIBLE sy-vline 
WA_DOUI_ELEM_ALV_STR-TOOLBAR_VISIBLE sy-vline 
WA_DOUI_ELEM_ALV_STR-SELECTION_MODE sy-vline 
WA_DOUI_ELEM_ALV_STR-ROW_COLOR_FIELD sy-vline 
WA_DOUI_ELEM_ALV_STR-FILTER_ENABLED sy-vline 
WA_DOUI_ELEM_ALV_STR-LIST_VIEW_ENABLED sy-vline 
WA_DOUI_ELEM_ALV_STR-CONFIGURATION_ENABLED sy-vline 
WA_DOUI_ELEM_ALV_STR-EXPORT_ENABLED sy-vline 
WA_DOUI_ELEM_ALV_STR-SORT_ENABLED sy-vline 
WA_DOUI_ELEM_ALV_STR-EMPTY_TABLE_TEXT sy-vline 
WA_DOUI_ELEM_ALV_STR-STD_DETAIL_ENABLED sy-vline 
WA_DOUI_ELEM_ALV_STR-TITLE_VISIBLE sy-vline 
WA_DOUI_ELEM_ALV_STR-DOCM_CHANGE_CMD sy-vline 
WA_DOUI_ELEM_ALV_STR-DOCM_CHANGED_AT sy-vline 
WA_DOUI_ELEM_ALV_STR-DOCM_CHANGED_BY sy-vline 
WA_DOUI_ELEM_ALV_STR-DOCM_PROG_INCLUDE sy-vline 
WA_DOUI_ELEM_ALV_STR-DOCM_PROG_LINE sy-vline 
WA_DOUI_ELEM_ALV_STR-DOCM_MAKE_SCENARIO sy-vline 
WA_DOUI_ELEM_ALV_STR-DOCM_BUILD_DOCUMENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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