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5.8

AND/OR problem

Asked by dbaSQL in MS SQL Server

i have a little AND/OR problem. see, we do electronic trades. i have an alert running out there that will send us email notifications if/when suspect data is found. bad symbols, bad prices, unknown id's, etc.
if/when suspect orders are found, they are written to a discrepancy table with a status of 'U' for unresolved. the email alert informs the enduser, who goes in via web interface to correct the orders. upon doing so, the status of the orders is changed to 'R' for resolved

this checker runs all day long throughout the trade day every 2 mintues
if a suspect order is found, it should be written to this table and the alert/email should be sent out.
if the problem is not corrected, and the order status is still 'U' (unresolved) the alert/email should continue to be sent, thus continually alerting the enduser until the order has been corrected

i thought i had it gotten that done with the NOT EXISTS checker way down there on status:

CREATE proc dbo.PROCNAME
@output bit = NULL output
AS

SET NOCOUNT ON
SET @OUTPUT = 0

--USERID/ACCTID CHECKER
create table #userids (userid varchar(20),acctid varchar(20),unique clustered (userid,acctid))
insert #users select distinct userid,acctid
from server.database.dbo.useridTable
where active = 'y'

DECLARE @start DATETIME, @end DATETIME
SELECT @start = DATEADD(minute, -10, GETDATE()), @end = DATEADD(minute, -1, GETDATE())

--USERID/ACCTID CHECKER
IF EXISTS (
SELECT 1 FROM database.dbo.orderTable t WITH (NOLOCK)
WHERE timeofexecution BETWEEN @start AND @end
AND NOT EXISTS (
SELECT 1 FROM #userids WHERE userid = t.userid
AND acctid = t.acctid
) )
BEGIN
SET @output = 1
PRINT 'Suspect Trades have been identified: userid/acctid
http://blah/blah.php'

INSERT INTO database.dbo.discrepancyTable (.........bunch of fields........)
SELECT .........same bunch of fields........
FROM database.dbo.orderTable t WITH (NOLOCK)
WHERE tradetime BETWEEN @start AND @end
AND NOT EXISTS (
SELECT 1 FROM #userids WHERE userid = t.userid
AND acctid = t.acctid )

AND NOT EXISTS (
SELECT 1 FROM database.dbo.discrepancyTable d WHERE datereported >= left(getdate()-0, 11)
AND d.status ='R'
AND d.ordernumber = t.ordernumber )
OPTION (MAXDOP 1)
END

but... subsequent email/alerts aren't being sent. i believe i just now realized that's because it's looking for suspect orders AND d.status <> 'R'
i got it to work in query analyzer by changing it to OR (see below), but my runtime went from 2 seconds to 24. see, i've got a test record in there, status = U, my OR NOT EXISTS is finding it, but the runtime is far too excessive

can anybody suggest a different means of doing this, or possibly let me know where in my tsql the flaw is, such that i can speed it back up ?
please?
...
.....
OR NOT EXISTS (
SELECT 1 FROM database.dbo.discrepancyTable d WHERE datereported >= left(getdate()-0, 11)
AND d.status ='R'
AND d.ordernumber = t.ordernumber )
OPTION (MAXDOP 1)
END

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20091111-EE-VQP-92

AND/OR problem

Asked by dbaSQL in MS SQL Server

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