ABAP Select data from SAP table /AIFX/WD_MM_TREE_DATA_ST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /AIFX/WD_MM_TREE_DATA_ST 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 /AIFX/WD_MM_TREE_DATA_ST. 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 /AIFX/WD_MM_TREE_DATA_ST 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_/AIFX/WD_MM_TREE_DATA_ST TYPE STANDARD TABLE OF /AIFX/WD_MM_TREE_DATA_ST,
      WA_/AIFX/WD_MM_TREE_DATA_ST TYPE /AIFX/WD_MM_TREE_DATA_ST,
      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: </AIFX/WD_MM_TREE_DATA_ST> TYPE /AIFX/WD_MM_TREE_DATA_ST.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /AIFX/WD_MM_TREE_DATA_ST
  INTO TABLE IT_/AIFX/WD_MM_TREE_DATA_ST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /AIFX/WD_MM_TREE_DATA_ST
*  INTO TABLE @DATA(IT_/AIFX/WD_MM_TREE_DATA_ST2).
*--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_/AIFX/WD_MM_TREE_DATA_ST INDEX 1 INTO DATA(WA_/AIFX/WD_MM_TREE_DATA_ST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/AIFX/WD_MM_TREE_DATA_ST ASSIGNING </AIFX/WD_MM_TREE_DATA_ST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</AIFX/WD_MM_TREE_DATA_ST>-NS = 1.
</AIFX/WD_MM_TREE_DATA_ST>-IFNAME = 1.
</AIFX/WD_MM_TREE_DATA_ST>-IFVERSION = 1.
</AIFX/WD_MM_TREE_DATA_ST>-NR = 1.
</AIFX/WD_MM_TREE_DATA_ST>-PARENT = 1.

ENDLOOP.

LOOP AT IT_/AIFX/WD_MM_TREE_DATA_ST INTO WA_/AIFX/WD_MM_TREE_DATA_ST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/AIFX/WD_MM_TREE_DATA_ST-NODE_KEY, sy-vline,
  WA_/AIFX/WD_MM_TREE_DATA_ST-NODE_TEXT, sy-vline,
  WA_/AIFX/WD_MM_TREE_DATA_ST-ALERT, sy-vline,
  WA_/AIFX/WD_MM_TREE_DATA_ST-MAIL, sy-vline,
  WA_/AIFX/WD_MM_TREE_DATA_ST-STATUS_ICON, sy-vline,
  WA_/AIFX/WD_MM_TREE_DATA_ST-COLLAPSED_ICON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/AIFX/WD_MM_TREE_DATA_ST 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_/AIFX/WD_MM_TREE_DATA_ST 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_/AIFX/WD_MM_TREE_DATA_ST INTO WA_/AIFX/WD_MM_TREE_DATA_ST.


*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_/AIFX/WD_MM_TREE_DATA_ST_STR, 
NS TYPE STRING,
IFNAME TYPE STRING,
IFVERSION TYPE STRING,
NR TYPE STRING,
PARENT TYPE STRING,
NODE_KEY TYPE STRING,
NODE_TEXT TYPE STRING,
ALERT TYPE STRING,
MAIL TYPE STRING,
STATUS_ICON TYPE STRING,
COLLAPSED_ICON TYPE STRING,
EXPANDED_ICON TYPE STRING,
COUNT_ALL TYPE STRING,
COUNT_W TYPE STRING,
COUNT_E TYPE STRING,
COUNT_A TYPE STRING,
COUNT_I TYPE STRING,
COUNT_S TYPE STRING,
COUNT_C TYPE STRING,
COUNT_ALL_TEXT TYPE STRING,
COUNT_W_TEXT TYPE STRING,
COUNT_E_TEXT TYPE STRING,
COUNT_A_TEXT TYPE STRING,
COUNT_I_TEXT TYPE STRING,
COUNT_S_TEXT TYPE STRING,
COUNT_C_TEXT TYPE STRING,
IS_TECHUSER TYPE STRING,
KEYVALUES TYPE STRING,
KEYFIELD_NAME TYPE STRING,
KEYVALUE_TEXT TYPE STRING,
NSRECIPIENT TYPE STRING,
RECIPIENT TYPE STRING,
EXPANDED TYPE STRING,
IS_LEAF TYPE STRING,
ALERT_ICON TYPE STRING,
ALERT_TOOLTIP TYPE STRING,
MAIL_ICON TYPE STRING,
MAIL_TOOLTIP TYPE STRING,
COUNT_ALL_ICON TYPE STRING,
COUNT_W_ICON TYPE STRING,
COUNT_E_ICON TYPE STRING,
COUNT_A_ICON TYPE STRING,
COUNT_I_ICON TYPE STRING,
COUNT_S_ICON TYPE STRING,
COUNT_C_ICON TYPE STRING,
STATUS_ICON2 TYPE STRING,
STATUS_TOOLTIP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/AIFX/WD_MM_TREE_DATA_ST_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_/AIFX/WD_MM_TREE_DATA_ST_STR-NS sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-IFNAME sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-IFVERSION sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-NR sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-PARENT sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-NODE_KEY sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-NODE_TEXT sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-ALERT sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-MAIL sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-STATUS_ICON sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COLLAPSED_ICON sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-EXPANDED_ICON sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COUNT_ALL sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COUNT_W sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COUNT_E sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COUNT_A sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COUNT_I sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COUNT_S sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COUNT_C sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COUNT_ALL_TEXT sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COUNT_W_TEXT sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COUNT_E_TEXT sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COUNT_A_TEXT sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COUNT_I_TEXT sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COUNT_S_TEXT sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COUNT_C_TEXT sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-IS_TECHUSER sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-KEYVALUES sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-KEYFIELD_NAME sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-KEYVALUE_TEXT sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-NSRECIPIENT sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-RECIPIENT sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-EXPANDED sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-IS_LEAF sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-ALERT_ICON sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-ALERT_TOOLTIP sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-MAIL_ICON sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-MAIL_TOOLTIP sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COUNT_ALL_ICON sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COUNT_W_ICON sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COUNT_E_ICON sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COUNT_A_ICON sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COUNT_I_ICON sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COUNT_S_ICON sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-COUNT_C_ICON sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-STATUS_ICON2 sy-vline 
WA_/AIFX/WD_MM_TREE_DATA_ST_STR-STATUS_TOOLTIP sy-vline      INTO ld_text SEPARATED BY SPACE.

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