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CHECKSUM Smalldatetime


CHECKSUM Smalldatetime peetyport NO[at]SPAM hotmail.com
12/7/2003 9:03:41 AM
sql server replication:
I have a table being replicated with two columns named "effdate" and
"termdate" which have a datatype which are smalldatetime. The value
for "effdate" is 10/1/2002. The value for "termdate" is 12/31/2078.

On my production server when I query this table it returns the values
"2002-10-01 00:00:00" and "2078-12-31 00:00:00". The replicated table
returns the values "2002-10-01 00:00:00.000" and "2078-12-31
00:00:00.000". When I query for the BINARY_CHECKSUM I get
"-1835532288" and "-10354688" on the production table and "37528" and
"65378" on the replicated table!!

Does anyone have an idea of why this differnce? Any help would be
greatly appreciated.


Kind Regards,

Stephen Rosales, Senior DBA
Schaller Anderson Network of Arizona, LLC
Re: CHECKSUM Smalldatetime peetyport NO[at]SPAM hotmail.com
12/7/2003 2:58:46 PM
"David Portas" <REMOVE_BEFORE_REPLYING_dportas@acm.org> wrote:>
[quoted text, click to view]

Thank you for the response. The replicated copy was created from a
snapshot and the datatype on all columns are SMALLDATETIME. Is there
any way that I could view the actual value that SQL Server is storing?

Kind Regards,

Stephen Rosales, DBA
Schaller Anderson Network of Arizona, LLC
Re: CHECKSUM Smalldatetime David Portas
12/7/2003 5:20:01 PM
Looks like these columns are SMALLDATETIME on the production copy and
DATETIME on the replicated copy. Even though they are the same values the
extra four bytes mean they have different checksums.

--
David Portas
------------
Please reply only to the newsgroup
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Re: CHECKSUM Smalldatetime peetyport NO[at]SPAM hotmail.com
12/7/2003 6:31:36 PM
[quoted text, click to view]

I'm looking at the datatype from design view in EM and I also looked
at the CREATE TABLE script generated in Query Analyzer. The database
is about 30GB in size and has 450 tables so I'm hesitant to break
replication and create a new snapshot.

Kind Regards,

Stephen Rosales
Re: CHECKSUM Smalldatetime Steve Kass
12/7/2003 6:32:15 PM
Stephen,

How are you viewing the datatype of the replicated copy columns? From
your original post, it appears that David is correct and the type is
datetime, since otherwise the replicated copy would not display

"2002-10-01 00:00:00.000" as the output. If you generate the CREATE TABLE statement for the replicated table, what do you see?

SK


[quoted text, click to view]
Re: CHECKSUM Smalldatetime David Portas
12/8/2003 8:02:38 AM
Here's a repro:

CREATE TABLE Production (effdate SMALLDATETIME, termdate SMALLDATETIME)
CREATE TABLE Replicated (effdate DATETIME, termdate DATETIME)

INSERT INTO Production VALUES ('20021001', '20781231')
INSERT INTO Replicated SELECT effdate, termdate FROM Production

SELECT CHECKSUM(effdate),CHECKSUM(termdate) FROM Production
SELECT CHECKSUM(effdate),CHECKSUM(termdate) FROM Replicated

Result:

----------- -----------
-1835532288 -10354688

(1 row(s) affected)


----------- -----------
37528 65378

(1 row(s) affected)


Based on your description I'm certain the columns you're running the
CHECKSUM against on the Replicated server are DATETIME rather than
SMALLDATETIME. Is there a possibility that you're looking at a view rather
than the base table?

If you still have a problem, please could you post your CREATE TABLE
statement from the Replicated copy and your code that produces the checksums
(as above).

--
David Portas
------------
Please reply only to the newsgroup
--

Re: CHECKSUM Smalldatetime peetyport NO[at]SPAM hotmail.com
12/8/2003 11:56:35 AM
"David Portas" <REMOVE_BEFORE_REPLYING_dportas@acm.org> wrote:>

Thanks for everyone's help. I decided to byte the bullet and create a
new snaphsot and resync the subscription. The CHECKSUM values are now
working. :-)

Kind Regrards,
Stephen Rosales
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