ABAP Select data from SAP table DB2TIOUT_TREE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB2TIOUT_TREE 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 DB2TIOUT_TREE. 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 DB2TIOUT_TREE 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_DB2TIOUT_TREE TYPE STANDARD TABLE OF DB2TIOUT_TREE,
      WA_DB2TIOUT_TREE TYPE DB2TIOUT_TREE,
      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: <DB2TIOUT_TREE> TYPE DB2TIOUT_TREE.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB2TIOUT_TREE.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB2TIOUT_TREE
  INTO TABLE IT_DB2TIOUT_TREE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB2TIOUT_TREE
*  INTO TABLE @DATA(IT_DB2TIOUT_TREE2).
*--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_DB2TIOUT_TREE INDEX 1 INTO DATA(WA_DB2TIOUT_TREE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB2TIOUT_TREE ASSIGNING <DB2TIOUT_TREE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB2TIOUT_TREE>-NAME = 1.
<DB2TIOUT_TREE>-TIODATE = 1.
<DB2TIOUT_TREE>-TIOTIME = 1.
<DB2TIOUT_TREE>-DBNAME = 1.
<DB2TIOUT_TREE>-RSID = 1.

ENDLOOP.

LOOP AT IT_DB2TIOUT_TREE INTO WA_DB2TIOUT_TREE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB2TIOUT_TREE-PARTID, sy-vline,
  WA_DB2TIOUT_TREE-LOCKTYPE, sy-vline,
  WA_DB2TIOUT_TREE-WPTYPE, sy-vline,
  WA_DB2TIOUT_TREE-WPNUMBER, sy-vline,
  WA_DB2TIOUT_TREE-WPID, sy-vline,
  WA_DB2TIOUT_TREE-SQLTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB2TIOUT_TREE 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_DB2TIOUT_TREE 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_DB2TIOUT_TREE INTO WA_DB2TIOUT_TREE.


*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_DB2TIOUT_TREE_STR, 
NAME TYPE STRING,
TIODATE TYPE STRING,
TIOTIME TYPE STRING,
DBNAME TYPE STRING,
RSID TYPE STRING,
PARTID TYPE STRING,
LOCKTYPE TYPE STRING,
WPTYPE TYPE STRING,
WPNUMBER TYPE STRING,
WPID TYPE STRING,
SQLTEXT TYPE STRING,
SQLID TYPE STRING,
SAPSID TYPE STRING,
ABAPREP TYPE STRING,
ENDUSER TYPE STRING,
AGGREGATE TYPE STRING,
IS_AGGREGATE TYPE STRING,
MEMBER TYPE STRING,
NODE_KEY TYPE STRING,
ORIGINTIME TYPE STRING,
MSEC TYPE STRING,
FLAG TYPE STRING,
TIHWID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB2TIOUT_TREE_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_DB2TIOUT_TREE_STR-NAME sy-vline 
WA_DB2TIOUT_TREE_STR-TIODATE sy-vline 
WA_DB2TIOUT_TREE_STR-TIOTIME sy-vline 
WA_DB2TIOUT_TREE_STR-DBNAME sy-vline 
WA_DB2TIOUT_TREE_STR-RSID sy-vline 
WA_DB2TIOUT_TREE_STR-PARTID sy-vline 
WA_DB2TIOUT_TREE_STR-LOCKTYPE sy-vline 
WA_DB2TIOUT_TREE_STR-WPTYPE sy-vline 
WA_DB2TIOUT_TREE_STR-WPNUMBER sy-vline 
WA_DB2TIOUT_TREE_STR-WPID sy-vline 
WA_DB2TIOUT_TREE_STR-SQLTEXT sy-vline 
WA_DB2TIOUT_TREE_STR-SQLID sy-vline 
WA_DB2TIOUT_TREE_STR-SAPSID sy-vline 
WA_DB2TIOUT_TREE_STR-ABAPREP sy-vline 
WA_DB2TIOUT_TREE_STR-ENDUSER sy-vline 
WA_DB2TIOUT_TREE_STR-AGGREGATE sy-vline 
WA_DB2TIOUT_TREE_STR-IS_AGGREGATE sy-vline 
WA_DB2TIOUT_TREE_STR-MEMBER sy-vline 
WA_DB2TIOUT_TREE_STR-NODE_KEY sy-vline 
WA_DB2TIOUT_TREE_STR-ORIGINTIME sy-vline 
WA_DB2TIOUT_TREE_STR-MSEC sy-vline 
WA_DB2TIOUT_TREE_STR-FLAG sy-vline 
WA_DB2TIOUT_TREE_STR-TIHWID sy-vline      INTO ld_text SEPARATED BY SPACE.

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