ABAP Select data from SAP table DBSTATTDB4 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DBSTATTDB4 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 DBSTATTDB4. 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 DBSTATTDB4 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_DBSTATTDB4 TYPE STANDARD TABLE OF DBSTATTDB4,
      WA_DBSTATTDB4 TYPE DBSTATTDB4,
      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: <DBSTATTDB4> TYPE DBSTATTDB4.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DBSTATTDB4.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DBSTATTDB4
  INTO TABLE IT_DBSTATTDB4.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DBSTATTDB4
*  INTO TABLE @DATA(IT_DBSTATTDB42).
*--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_DBSTATTDB4 INDEX 1 INTO DATA(WA_DBSTATTDB42).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DBSTATTDB4 ASSIGNING <DBSTATTDB4>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DBSTATTDB4>-TABNAME = 1.
<DBSTATTDB4>-ANDAT = 1.
<DBSTATTDB4>-VWTYP = 1.
<DBSTATTDB4>-TABSIZE = 1.
<DBSTATTDB4>-CURROWS = 1.

ENDLOOP.

LOOP AT IT_DBSTATTDB4 INTO WA_DBSTATTDB4.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DBSTATTDB4-INDBS, sy-vline,
  WA_DBSTATTDB4-DLTROWS, sy-vline,
  WA_DBSTATTDB4-NUMOPEN, sy-vline,
  WA_DBSTATTDB4-NUMCLOSE, sy-vline,
  WA_DBSTATTDB4-NUMINSERT, sy-vline,
  WA_DBSTATTDB4-NUMUPDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DBSTATTDB4 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_DBSTATTDB4 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_DBSTATTDB4 INTO WA_DBSTATTDB4.


*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_DBSTATTDB4_STR, 
TABNAME TYPE STRING,
ANDAT TYPE STRING,
VWTYP TYPE STRING,
TABSIZE TYPE STRING,
CURROWS TYPE STRING,
INDBS TYPE STRING,
DLTROWS TYPE STRING,
NUMOPEN TYPE STRING,
NUMCLOSE TYPE STRING,
NUMINSERT TYPE STRING,
NUMUPDATE TYPE STRING,
NUMDELETE TYPE STRING,
NUMLREAD TYPE STRING,
NUMPREAD TYPE STRING,
NUMCST TYPE STRING,
CSTSIZE TYPE STRING,
CRTDATE TYPE STRING,
CRTTIME TYPE STRING,
SAVDATE TYPE STRING,
SAVTIME TYPE STRING,
RSTDATE TYPE STRING,
RSTTIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DBSTATTDB4_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_DBSTATTDB4_STR-TABNAME sy-vline 
WA_DBSTATTDB4_STR-ANDAT sy-vline 
WA_DBSTATTDB4_STR-VWTYP sy-vline 
WA_DBSTATTDB4_STR-TABSIZE sy-vline 
WA_DBSTATTDB4_STR-CURROWS sy-vline 
WA_DBSTATTDB4_STR-INDBS sy-vline 
WA_DBSTATTDB4_STR-DLTROWS sy-vline 
WA_DBSTATTDB4_STR-NUMOPEN sy-vline 
WA_DBSTATTDB4_STR-NUMCLOSE sy-vline 
WA_DBSTATTDB4_STR-NUMINSERT sy-vline 
WA_DBSTATTDB4_STR-NUMUPDATE sy-vline 
WA_DBSTATTDB4_STR-NUMDELETE sy-vline 
WA_DBSTATTDB4_STR-NUMLREAD sy-vline 
WA_DBSTATTDB4_STR-NUMPREAD sy-vline 
WA_DBSTATTDB4_STR-NUMCST sy-vline 
WA_DBSTATTDB4_STR-CSTSIZE sy-vline 
WA_DBSTATTDB4_STR-CRTDATE sy-vline 
WA_DBSTATTDB4_STR-CRTTIME sy-vline 
WA_DBSTATTDB4_STR-SAVDATE sy-vline 
WA_DBSTATTDB4_STR-SAVTIME sy-vline 
WA_DBSTATTDB4_STR-RSTDATE sy-vline 
WA_DBSTATTDB4_STR-RSTTIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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