Thanks for your reply.
I checked the processlist and it continues to execute even after the VB application is hung. I know the application is hung by checking its status in the Windows Task manager.
The 'hostname.err' file did not show any errors. Is there another file i should be looking at?
The error handler in in VB could not handle the error.
Is there some ODBC setting I need to optimize?
Any help will be appreciated. Thanks Greg
From: Victor Pendleton <[EMAIL PROTECTED]>
To: 'Greg Zimmermack ' <[EMAIL PROTECTED]>,"'[EMAIL PROTECTED] '" <[EMAIL PROTECTED]>
Subject: RE: MySQL and VBquestion - problem with query that returns 100000+ records
Date: Wed, 30 Jun 2004 09:19:11 -0500
While the Visual Basic application is querying the database can you log into
the MySQL via the mysql monitor and do a show processlist to see if the
query is executing? If not I would suggest you view the mysql error log or
set up Visual basic to throw and error when it is getting disconnected.
-----Original Message----- From: Greg Zimmermack To: [EMAIL PROTECTED] Sent: 6/30/04 9:13 AM Subject: MySQL and VBquestion - problem with query that returns 100000+ records
I have an SQL which looks something like:
SELECT S.FirstName, T.CreateDateTime, T.TranDateTime, P.FirstName, P.LastName, D.DiagnosisIDString, T.CheckNumber, T.StmtDesc, T.ServPayAdjIDString, T.PatientAmt, T.InsuranceAmt, T.ClaimID, T.AuditDateTime, T.TransactionType, T.ProviderID, PR.FirstName, PR.LastName FROM (((Provider PR INNER JOIN (Person P INNER JOIN Transaction T ON P.PersonID = T.PersonID) ON PR.ProviderID = T.ProviderID) LEFT JOIN PatientService PS ON T.TransactionID = PS.TransactionID) LEFT JOIN Diagnosis D ON PS.DiagnosisID1 = D.DiagnosisID) INNER JOIN Staff S ON T.CreatedBy = S.StaffID WHERE (((T.ServPayAdjIDString)<>'inibal') AND ((T.IsDeleted)=0)) ORDER BY PR.LastName, PR.FirstName, T.TranDateTime DESC
This query is invoked from a Visual Basic 6.0 application that uses ADO & ODBC to connect to a MySQL database.
The query runs fine on a small test database but when i run it on the production database the application just hangs up without generating any
error messages.
The query is expected to return some 196000 records from the production database. Can this (large number of records) be causing the problem?
Is there any setting in MySQL that I could change ?
If i run the query on the server i can see upto 1000 records but no more.
This is my first attempt at MySQL hence the newbie type questions.
I should also mention that the application in question originally used an MS Access database and it can pull all the 196000 records from it.
Any help will be greatly appreciated. Thanks Greg
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