ABAP Select data from SAP table TTE_DT_SCR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TTE_DT_SCR
*  INTO TABLE @DATA(IT_TTE_DT_SCR2).
*--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_TTE_DT_SCR INDEX 1 INTO DATA(WA_TTE_DT_SCR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TTE_DT_SCR>-TREETEXT = 1.
<TTE_DT_SCR>-TREEID = 1.
<TTE_DT_SCR>-TESTFIELD = 1.
<TTE_DT_SCR>-CMPFIELD1 = 1.
<TTE_DT_SCR>-COMPFIELD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TTE_DT_SCR-TREETYPE, sy-vline,
  WA_TTE_DT_SCR-ERRTEXT, sy-vline,
  WA_TTE_DT_SCR-NODETEXT, sy-vline,
  WA_TTE_DT_SCR-FILENAME, sy-vline,
  WA_TTE_DT_SCR-NEWTREEID, sy-vline,
  WA_TTE_DT_SCR-STATTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TTE_DT_SCR 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_TTE_DT_SCR 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_TTE_DT_SCR INTO WA_TTE_DT_SCR.


*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_TTE_DT_SCR_STR, 
TREETEXT TYPE STRING,
TREEID TYPE STRING,
TESTFIELD TYPE STRING,
CMPFIELD1 TYPE STRING,
COMPFIELD TYPE STRING,
TREETYPE TYPE STRING,
ERRTEXT TYPE STRING,
NODETEXT TYPE STRING,
FILENAME TYPE STRING,
NEWTREEID TYPE STRING,
STATTEXT TYPE STRING,
FCATVAR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TTE_DT_SCR_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_TTE_DT_SCR_STR-TREETEXT sy-vline 
WA_TTE_DT_SCR_STR-TREEID sy-vline 
WA_TTE_DT_SCR_STR-TESTFIELD sy-vline 
WA_TTE_DT_SCR_STR-CMPFIELD1 sy-vline 
WA_TTE_DT_SCR_STR-COMPFIELD sy-vline 
WA_TTE_DT_SCR_STR-TREETYPE sy-vline 
WA_TTE_DT_SCR_STR-ERRTEXT sy-vline 
WA_TTE_DT_SCR_STR-NODETEXT sy-vline 
WA_TTE_DT_SCR_STR-FILENAME sy-vline 
WA_TTE_DT_SCR_STR-NEWTREEID sy-vline 
WA_TTE_DT_SCR_STR-STATTEXT sy-vline 
WA_TTE_DT_SCR_STR-FCATVAR sy-vline      INTO ld_text SEPARATED BY SPACE.

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