ABAP Select data from SAP table /SMB/S_TASK_DATA_NESTED into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SMB/S_TASK_DATA_NESTED
*  INTO TABLE @DATA(IT_/SMB/S_TASK_DATA_NESTED2).
*--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_/SMB/S_TASK_DATA_NESTED INDEX 1 INTO DATA(WA_/SMB/S_TASK_DATA_NESTED2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SMB/S_TASK_DATA_NESTED>-STATE = 1.
</SMB/S_TASK_DATA_NESTED>-PURPOSE = 1.
</SMB/S_TASK_DATA_NESTED>-FIELDNAME_PRI = 1.
</SMB/S_TASK_DATA_NESTED>-CHG_TYPE = 1.
</SMB/S_TASK_DATA_NESTED>-PRJID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SMB/S_TASK_DATA_NESTED-BBID, sy-vline,
  WA_/SMB/S_TASK_DATA_NESTED-SEQNUM, sy-vline,
  WA_/SMB/S_TASK_DATA_NESTED-ORDER_NUMBER, sy-vline,
  WA_/SMB/S_TASK_DATA_NESTED-OBJTY, sy-vline,
  WA_/SMB/S_TASK_DATA_NESTED-OBJID, sy-vline,
  WA_/SMB/S_TASK_DATA_NESTED-FILENAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SMB/S_TASK_DATA_NESTED 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_/SMB/S_TASK_DATA_NESTED 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_/SMB/S_TASK_DATA_NESTED INTO WA_/SMB/S_TASK_DATA_NESTED.


*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_/SMB/S_TASK_DATA_NESTED_STR, 
STATE TYPE STRING,
PURPOSE TYPE STRING,
FIELDNAME_PRI TYPE STRING,
CHG_TYPE TYPE STRING,
PRJID TYPE STRING,
BBID TYPE STRING,
SEQNUM TYPE STRING,
ORDER_NUMBER TYPE STRING,
OBJTY TYPE STRING,
OBJID TYPE STRING,
FILENAME TYPE STRING,
PARENT TYPE STRING,
INTERACT TYPE STRING,
MANDAT TYPE STRING,
LONGTX TYPE STRING,
DOC_ID TYPE STRING,
DOC_POPUP TYPE STRING,
TCODE TYPE STRING,
SYSDATA TYPE STRING,
TESTSYSTEM TYPE STRING,
ECAT_VAR TYPE STRING,
DEMO TYPE STRING,
FIELDNAME TYPE STRING,
CLIENT_DEP TYPE STRING,
IMG_ACTIVITY TYPE STRING,
ELEMENT_HIER TYPE STRING,
OBJECTNAME TYPE STRING,
OBJECTTYPE TYPE STRING,
ITEMS TYPE STRING,
ITEMS_REF TYPE STRING,
DESCRIPTION TYPE STRING,
LANGUAGE_DEPENDENCY TYPE STRING,
IS_TECH_LANG_DEP TYPE STRING,
LANGUAGE_KEY_PARAM TYPE STRING,
PRJID_PRI TYPE STRING,
OBJID_PRI TYPE STRING,
OBJTY_PRI TYPE STRING,
FILENAME_PRI TYPE STRING,
BBID_PRI TYPE STRING,
POS_BEFORE TYPE STRING,
IDX TYPE STRING,
FILE_NEW TYPE STRING,
NODE TYPE STRING,
SUBOBJECTS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SMB/S_TASK_DATA_NESTED_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_/SMB/S_TASK_DATA_NESTED_STR-STATE sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-PURPOSE sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-FIELDNAME_PRI sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-CHG_TYPE sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-PRJID sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-BBID sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-SEQNUM sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-ORDER_NUMBER sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-OBJTY sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-OBJID sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-FILENAME sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-PARENT sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-INTERACT sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-MANDAT sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-LONGTX sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-DOC_ID sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-DOC_POPUP sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-TCODE sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-SYSDATA sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-TESTSYSTEM sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-ECAT_VAR sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-DEMO sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-FIELDNAME sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-CLIENT_DEP sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-IMG_ACTIVITY sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-ELEMENT_HIER sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-OBJECTNAME sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-OBJECTTYPE sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-ITEMS sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-ITEMS_REF sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-DESCRIPTION sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-LANGUAGE_DEPENDENCY sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-IS_TECH_LANG_DEP sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-LANGUAGE_KEY_PARAM sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-PRJID_PRI sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-OBJID_PRI sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-OBJTY_PRI sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-FILENAME_PRI sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-BBID_PRI sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-POS_BEFORE sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-IDX sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-FILE_NEW sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-NODE sy-vline 
WA_/SMB/S_TASK_DATA_NESTED_STR-SUBOBJECTS sy-vline      INTO ld_text SEPARATED BY SPACE.

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