ABAP Select data from SAP table DB2DB02TBSIZE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB2DB02TBSIZE 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 DB2DB02TBSIZE. 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 DB2DB02TBSIZE 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_DB2DB02TBSIZE TYPE STANDARD TABLE OF DB2DB02TBSIZE,
      WA_DB2DB02TBSIZE TYPE DB2DB02TBSIZE,
      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: <DB2DB02TBSIZE> TYPE DB2DB02TBSIZE.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB2DB02TBSIZE.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB2DB02TBSIZE
  INTO TABLE IT_DB2DB02TBSIZE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB2DB02TBSIZE
*  INTO TABLE @DATA(IT_DB2DB02TBSIZE2).
*--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_DB2DB02TBSIZE INDEX 1 INTO DATA(WA_DB2DB02TBSIZE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB2DB02TBSIZE ASSIGNING <DB2DB02TBSIZE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB2DB02TBSIZE>-TBCREATOR = 1.
<DB2DB02TBSIZE>-TBNAME = 1.
<DB2DB02TBSIZE>-STORDATE = 1.
<DB2DB02TBSIZE>-STORTIME = 1.
<DB2DB02TBSIZE>-TSNAME = 1.

ENDLOOP.

LOOP AT IT_DB2DB02TBSIZE INTO WA_DB2DB02TBSIZE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB2DB02TBSIZE-DBNAME, sy-vline,
  WA_DB2DB02TBSIZE-PARTITIONS, sy-vline,
  WA_DB2DB02TBSIZE-TBSIZE, sy-vline,
  WA_DB2DB02TBSIZE-SPACEF, sy-vline,
  WA_DB2DB02TBSIZE-STATSTIME, sy-vline,
  WA_DB2DB02TBSIZE-TS_ALLOCSIZE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB2DB02TBSIZE 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_DB2DB02TBSIZE 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_DB2DB02TBSIZE INTO WA_DB2DB02TBSIZE.


*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_DB2DB02TBSIZE_STR, 
TBCREATOR TYPE STRING,
TBNAME TYPE STRING,
STORDATE TYPE STRING,
STORTIME TYPE STRING,
TSNAME TYPE STRING,
DBNAME TYPE STRING,
PARTITIONS TYPE STRING,
TBSIZE TYPE STRING,
SPACEF TYPE STRING,
STATSTIME TYPE STRING,
TS_ALLOCSIZE TYPE STRING,
TS_FREESIZE TYPE STRING,
PCTUSED TYPE STRING,
RTS_TOTALROWS TYPE STRING,
AVGROWLENGTH TYPE STRING,
RTS_ST_CHANGES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB2DB02TBSIZE_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_DB2DB02TBSIZE_STR-TBCREATOR sy-vline 
WA_DB2DB02TBSIZE_STR-TBNAME sy-vline 
WA_DB2DB02TBSIZE_STR-STORDATE sy-vline 
WA_DB2DB02TBSIZE_STR-STORTIME sy-vline 
WA_DB2DB02TBSIZE_STR-TSNAME sy-vline 
WA_DB2DB02TBSIZE_STR-DBNAME sy-vline 
WA_DB2DB02TBSIZE_STR-PARTITIONS sy-vline 
WA_DB2DB02TBSIZE_STR-TBSIZE sy-vline 
WA_DB2DB02TBSIZE_STR-SPACEF sy-vline 
WA_DB2DB02TBSIZE_STR-STATSTIME sy-vline 
WA_DB2DB02TBSIZE_STR-TS_ALLOCSIZE sy-vline 
WA_DB2DB02TBSIZE_STR-TS_FREESIZE sy-vline 
WA_DB2DB02TBSIZE_STR-PCTUSED sy-vline 
WA_DB2DB02TBSIZE_STR-RTS_TOTALROWS sy-vline 
WA_DB2DB02TBSIZE_STR-AVGROWLENGTH sy-vline 
WA_DB2DB02TBSIZE_STR-RTS_ST_CHANGES sy-vline      INTO ld_text SEPARATED BY SPACE.

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