ABAP Select data from SAP table EWAEL_TREE_OPTIONS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EWAEL_TREE_OPTIONS
*  INTO TABLE @DATA(IT_EWAEL_TREE_OPTIONS2).
*--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_EWAEL_TREE_OPTIONS INDEX 1 INTO DATA(WA_EWAEL_TREE_OPTIONS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EWAEL_TREE_OPTIONS>-NODE_SEL_MODE = 1.
<EWAEL_TREE_OPTIONS>-ITEM_SELECTION = 1.
<EWAEL_TREE_OPTIONS>-HIDE_SELECTION = 1.
<EWAEL_TREE_OPTIONS>-WITH_HEADERS = 1.
<EWAEL_TREE_OPTIONS>-HASTOOLBAR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EWAEL_TREE_OPTIONS-HIERARCHY_HEADER, sy-vline,
  WA_EWAEL_TREE_OPTIONS-T_IMAGE, sy-vline,
  WA_EWAEL_TREE_OPTIONS-HEADING, sy-vline,
  WA_EWAEL_TREE_OPTIONS-TOOLTIP, sy-vline,
  WA_EWAEL_TREE_OPTIONS-WIDTH, sy-vline,
  WA_EWAEL_TREE_OPTIONS-WIDTH_PIX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EWAEL_TREE_OPTIONS 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_EWAEL_TREE_OPTIONS 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_EWAEL_TREE_OPTIONS INTO WA_EWAEL_TREE_OPTIONS.


*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_EWAEL_TREE_OPTIONS_STR, 
NODE_SEL_MODE TYPE STRING,
ITEM_SELECTION TYPE STRING,
HIDE_SELECTION TYPE STRING,
WITH_HEADERS TYPE STRING,
HASTOOLBAR TYPE STRING,
HIERARCHY_HEADER TYPE STRING,
T_IMAGE TYPE STRING,
HEADING TYPE STRING,
TOOLTIP TYPE STRING,
WIDTH TYPE STRING,
WIDTH_PIX TYPE STRING,
LIST_HEADER TYPE STRING,
T_IMAGE TYPE STRING,
HEADING TYPE STRING,
TOOLTIP TYPE STRING,
NAME TYPE STRING,
HASTITLEBAR TYPE STRING,
HASSTATUSBAR TYPE STRING,
TITLESIZE TYPE STRING,
STATUSSIZE TYPE STRING,
TITLETEXT TYPE STRING,
STATUSTEXT TYPE STRING,
TITLEBACKCOLOR TYPE STRING,
STATUSBACKCOLOR TYPE STRING,
TITLETEXTCOLOR TYPE STRING,
STATUSTEXTCOLOR TYPE STRING,
TOOLBAR_OPTIONS TYPE STRING,
HAS_BTN_TREERFRSH TYPE STRING,
HAS_BTN_FULLCLLPS TYPE STRING,
HAS_BTN_RMVEMPTYFLDRS TYPE STRING,
HAS_BTN_FULLEXPAND TYPE STRING,
HAS_DRPDWN_TREES TYPE STRING,
HAS_DRPDWN_FILTERS TYPE STRING,
HAS_DRPDWN_SEARCH TYPE STRING,
TOOLBUTTONS TYPE STRING,
HAS_BTN_CUT TYPE STRING,
HAS_BTN_COPY TYPE STRING,
HAS_BTN_PASTE TYPE STRING,
STATIC_CTXMENUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EWAEL_TREE_OPTIONS_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_EWAEL_TREE_OPTIONS_STR-NODE_SEL_MODE sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-ITEM_SELECTION sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-HIDE_SELECTION sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-WITH_HEADERS sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-HASTOOLBAR sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-HIERARCHY_HEADER sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-T_IMAGE sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-HEADING sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-TOOLTIP sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-WIDTH sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-WIDTH_PIX sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-LIST_HEADER sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-T_IMAGE sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-HEADING sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-TOOLTIP sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-NAME sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-HASTITLEBAR sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-HASSTATUSBAR sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-TITLESIZE sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-STATUSSIZE sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-TITLETEXT sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-STATUSTEXT sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-TITLEBACKCOLOR sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-STATUSBACKCOLOR sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-TITLETEXTCOLOR sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-STATUSTEXTCOLOR sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-TOOLBAR_OPTIONS sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-HAS_BTN_TREERFRSH sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-HAS_BTN_FULLCLLPS sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-HAS_BTN_RMVEMPTYFLDRS sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-HAS_BTN_FULLEXPAND sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-HAS_DRPDWN_TREES sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-HAS_DRPDWN_FILTERS sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-HAS_DRPDWN_SEARCH sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-TOOLBUTTONS sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-HAS_BTN_CUT sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-HAS_BTN_COPY sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-HAS_BTN_PASTE sy-vline 
WA_EWAEL_TREE_OPTIONS_STR-STATIC_CTXMENUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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