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Message Posted: Wed, 29 Jul 2009 @ 20:07:55 GMT


     
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Subj:   Re: Compression and negative values
 
From:   Dieter Noeth

For a decimal(5,4) there's no difference if you write 5./5.0/5.00/5.000/5.000, because it's always with 4 fractional digits, it's not an Oracle number.

     CREATE TABLE dummy
     ( i INT,
        ID DECIMAL (4,0) COMPRESS (-1),
        ID2 DECIMAL (4,4 ) COMPRESS (0)
       );

       *** Table has been created.
       *** Total elapsed time was 1 second.


       BTEQ -- Enter your DBC/SQL request or BTEQ command:

     SHOW TABLE dummy;

       *** Text of DDL statement returned.
       *** Total elapsed time was 1 second.

     --------------------------------------------------------
     CREATE SET TABLE TERADATA_EDUCATION.dummy ,NO FALLBACK ,
           NO BEFORE JOURNAL,
           NO AFTER JOURNAL,
           CHECKSUM = DEFAULT
           (
            i INTEGER,
            ID DECIMAL(4,0) COMPRESS -1. ,
            ID2 DECIMAL(4,4) COMPRESS 0.0000 ) PRIMARY INDEX ( i );

But, wouldn't it be faster to simply that it on your own?


Dieter



     
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