ABAP Select data from SAP table TETYP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TETYP
*  INTO TABLE @DATA(IT_TETYP2).
*--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_TETYP INDEX 1 INTO DATA(WA_TETYP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TETYP>-TREE_NOTYP = 1.
<TETYP>-MODELEMENT = 1.
<TETYP>-COLOUR = 1.
<TETYP>-PARE_NOTYP = 1.
<TETYP>-DYNNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TETYP-SEQUENCE, sy-vline,
  WA_TETYP-HIERARCHY, sy-vline,
  WA_TETYP-HLEVEL, sy-vline,
  WA_TETYP-ICONNAME, sy-vline,
  WA_TETYP-VISORDER, sy-vline,
  WA_TETYP-NETTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TETYP 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_TETYP 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_TETYP INTO WA_TETYP.


*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_TETYP_STR, 
TREE_NOTYP TYPE STRING,
MODELEMENT TYPE STRING,
COLOUR TYPE STRING,
PARE_NOTYP TYPE STRING,
DYNNR TYPE STRING,
SEQUENCE TYPE STRING,
HIERARCHY TYPE STRING,
HLEVEL TYPE STRING,
ICONNAME TYPE STRING,
VISORDER TYPE STRING,
NETTYPE TYPE STRING,
PRTTYPE TYPE STRING,
MNETTYPE TYPE STRING,
MPRTTYPE TYPE STRING,
FB_CHECK TYPE STRING,
FB_PRINT TYPE STRING,
ICONFILE TYPE STRING,
START_NODE TYPE STRING,
END_NODE TYPE STRING,
XOR_FLAG TYPE STRING,
BLOCKID TYPE STRING,
NEST_LEVEL TYPE STRING,
USEDEFTEXT TYPE STRING,
STRT_NOTYP TYPE STRING,
NOTCHECKABLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TETYP_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_TETYP_STR-TREE_NOTYP sy-vline 
WA_TETYP_STR-MODELEMENT sy-vline 
WA_TETYP_STR-COLOUR sy-vline 
WA_TETYP_STR-PARE_NOTYP sy-vline 
WA_TETYP_STR-DYNNR sy-vline 
WA_TETYP_STR-SEQUENCE sy-vline 
WA_TETYP_STR-HIERARCHY sy-vline 
WA_TETYP_STR-HLEVEL sy-vline 
WA_TETYP_STR-ICONNAME sy-vline 
WA_TETYP_STR-VISORDER sy-vline 
WA_TETYP_STR-NETTYPE sy-vline 
WA_TETYP_STR-PRTTYPE sy-vline 
WA_TETYP_STR-MNETTYPE sy-vline 
WA_TETYP_STR-MPRTTYPE sy-vline 
WA_TETYP_STR-FB_CHECK sy-vline 
WA_TETYP_STR-FB_PRINT sy-vline 
WA_TETYP_STR-ICONFILE sy-vline 
WA_TETYP_STR-START_NODE sy-vline 
WA_TETYP_STR-END_NODE sy-vline 
WA_TETYP_STR-XOR_FLAG sy-vline 
WA_TETYP_STR-BLOCKID sy-vline 
WA_TETYP_STR-NEST_LEVEL sy-vline 
WA_TETYP_STR-USEDEFTEXT sy-vline 
WA_TETYP_STR-STRT_NOTYP sy-vline 
WA_TETYP_STR-NOTCHECKABLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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