Dynamic Evaluation

Jul 23, 2005

/* goal: dynamic evaluation of table row
platform: sql 2000
*/

use northwind;

declare @tbl sysname
set @tbl = 'customers'

EXEC('select count(*) from ' +@tbl)

/*
Why the following dynamic evaluation would fail
IF EXEC('select count(*) from ' +@tbl) = 0
PRINT 'no rows'

Its variant,
IF exists (EXEC('select count(*) from ' +@tbl)) = 0
PRINT 'no rows'
*/

Do I know more sleep :)

TIA.

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Jan 27, 2005

Hi I am trying to do something like the following:

DECLARE @Operator varchar(1)
DECLARE @Rate float
DECLARE @Quantity float
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SET @Operator = '/'
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PRINT @Converted

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The reason I need to do it like this is that @Operator will change at runtime...

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Jan 17, 2008



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It is also strange that it has continued to function for so long - if it is in fact an eval version.


Here is the log where things began to go wrong.



Code Block

ReportingServicesService!resourceutilities!9!12/27/2007-19:51:51:: i INFO: Reporting Services starting SKU: Enterprise
ReportingServicesService!resourceutilities!9!12/27/2007-19:51:51:: i INFO: Evaluation copy: 0 days left
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ReportingServicesService!runningjobs!9!12/27/2007-19:51:51:: i INFO: Running Requests DB timer enabled: Next Event: 60 seconds. Cycle: 60 seconds
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ReportingServicesService!dbpolling!e!12/27/2007-19:51:52:: EventPolling heartbeat thread started.
ReportingServicesService!dbpolling!d!12/27/2007-19:51:52:: NotificationPolling heartbeat thread started.
ReportingServicesService!dbpolling!c!12/27/2007-19:51:52:: Polling started
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ReportingServicesService!dbpolling!10!12/27/2007-20:02:48:: EventPolling polling service stopped
ReportingServicesService!dbpolling!e!12/27/2007-20:02:48:: EventPolling heartbeat thread exiting for stop.
ReportingServicesService!dbpolling!10!12/27/2007-20:02:48:: NotificationPolling polling service stopped
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I didn't notice this line in the log until now:
ReportingServicesService!schedule!f!12/27/2007-19:51:52:: Unhandled exception caught in Scheduling maintenance thread: System.Data.SqlClient.SqlException: The EXECUTE permission was denied on the object 'sp_help_jobschedule', database 'msdb', schema 'dbo'.
at Microsoft.ReportingServices.Library.SchedulePollWorker.CheckScheduleConsistancy(Object state)

Looks like that is the reason for the failed schedule recreation.

Thanks for any help.

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WIth best regards,
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Code Block
declare @guard varchar(20)
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Sep 24, 2015

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Aug 22, 2007


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Information: 0x4004300A at Update Analysis Table, DTS.Pipeline: Validation phase is beginning.
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@Description varchar(32),
@Type tinyint,
@DeviceType varchar(32),
@Dimension varchar(32),
@Unit varchar(32)
AS
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END
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END
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END
ELSE
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END
GO


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