ABAP Select data from SAP table DB6TSSNAP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB6TSSNAP 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 DB6TSSNAP. 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 DB6TSSNAP 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_DB6TSSNAP TYPE STANDARD TABLE OF DB6TSSNAP,
      WA_DB6TSSNAP TYPE DB6TSSNAP,
      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: <DB6TSSNAP> TYPE DB6TSSNAP.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB6TSSNAP.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB6TSSNAP
  INTO TABLE IT_DB6TSSNAP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB6TSSNAP
*  INTO TABLE @DATA(IT_DB6TSSNAP2).
*--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_DB6TSSNAP INDEX 1 INTO DATA(WA_DB6TSSNAP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB6TSSNAP ASSIGNING <DB6TSSNAP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB6TSSNAP>-TABSPACE = 1.
<DB6TSSNAP>-LREADS = 1.
<DB6TSSNAP>-PREADS = 1.
<DB6TSSNAP>-PADREADS = 1.
<DB6TSSNAP>-WRITES = 1.

ENDLOOP.

LOOP AT IT_DB6TSSNAP INTO WA_DB6TSSNAP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB6TSSNAP-PADWRITES, sy-vline,
  WA_DB6TSSNAP-ILREADS, sy-vline,
  WA_DB6TSSNAP-IPREADS, sy-vline,
  WA_DB6TSSNAP-IWRITES, sy-vline,
  WA_DB6TSSNAP-PAIWRITES, sy-vline,
  WA_DB6TSSNAP-PAIREADS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB6TSSNAP 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_DB6TSSNAP 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_DB6TSSNAP INTO WA_DB6TSSNAP.


*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_DB6TSSNAP_STR, 
TABSPACE TYPE STRING,
LREADS TYPE STRING,
PREADS TYPE STRING,
PADREADS TYPE STRING,
WRITES TYPE STRING,
PADWRITES TYPE STRING,
ILREADS TYPE STRING,
IPREADS TYPE STRING,
IWRITES TYPE STRING,
PAIWRITES TYPE STRING,
PAIREADS TYPE STRING,
READTIME TYPE STRING,
WRITETIME TYPE STRING,
PARTIME TYPE STRING,
PAWTIME TYPE STRING,
PADRREQS TYPE STRING,
DIRREADS TYPE STRING,
DIRWRITES TYPE STRING,
DIRRREQS TYPE STRING,
DIRWREQS TYPE STRING,
DIRRTIME TYPE STRING,
DIRWTIME TYPE STRING,
CLOSEDFILE TYPE STRING,
PDAT2ESTOR TYPE STRING,
PIDX2ESTOR TYPE STRING,
DATESTOR2P TYPE STRING,
IDXESTOR2P TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB6TSSNAP_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_DB6TSSNAP_STR-TABSPACE sy-vline 
WA_DB6TSSNAP_STR-LREADS sy-vline 
WA_DB6TSSNAP_STR-PREADS sy-vline 
WA_DB6TSSNAP_STR-PADREADS sy-vline 
WA_DB6TSSNAP_STR-WRITES sy-vline 
WA_DB6TSSNAP_STR-PADWRITES sy-vline 
WA_DB6TSSNAP_STR-ILREADS sy-vline 
WA_DB6TSSNAP_STR-IPREADS sy-vline 
WA_DB6TSSNAP_STR-IWRITES sy-vline 
WA_DB6TSSNAP_STR-PAIWRITES sy-vline 
WA_DB6TSSNAP_STR-PAIREADS sy-vline 
WA_DB6TSSNAP_STR-READTIME sy-vline 
WA_DB6TSSNAP_STR-WRITETIME sy-vline 
WA_DB6TSSNAP_STR-PARTIME sy-vline 
WA_DB6TSSNAP_STR-PAWTIME sy-vline 
WA_DB6TSSNAP_STR-PADRREQS sy-vline 
WA_DB6TSSNAP_STR-DIRREADS sy-vline 
WA_DB6TSSNAP_STR-DIRWRITES sy-vline 
WA_DB6TSSNAP_STR-DIRRREQS sy-vline 
WA_DB6TSSNAP_STR-DIRWREQS sy-vline 
WA_DB6TSSNAP_STR-DIRRTIME sy-vline 
WA_DB6TSSNAP_STR-DIRWTIME sy-vline 
WA_DB6TSSNAP_STR-CLOSEDFILE sy-vline 
WA_DB6TSSNAP_STR-PDAT2ESTOR sy-vline 
WA_DB6TSSNAP_STR-PIDX2ESTOR sy-vline 
WA_DB6TSSNAP_STR-DATESTOR2P sy-vline 
WA_DB6TSSNAP_STR-IDXESTOR2P sy-vline      INTO ld_text SEPARATED BY SPACE.

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