System Generated Indexes Or Not?
Jun 21, 2001
I ran a SP that lists fragmented tables in our DB which listed almost all the tables and indexes in the DB. The list includes index names that start with "_WA_Sys_tablecolumn name_.....". Are these SQL Server generated indexes or are these statitics on the tables? What are they? If these are system generated indexes as I thought they were, how are they generated? Can these indexes be dropped or should one want to? IF so, how? Any effect on the DB performance if dropped?
Thanks for your advise.
Helen
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Dec 26, 1999
Anybody had experience dropping the system generated index?
I tried to drop some auto-generated index which usually have name like _WA_Sys_[column name}_07F6335A. Then I follow the table.index name rule. It always show no such index exists in the database. But I can query these indexes in sysindexes and verify they are there. What went wrong?
Help appreciated very much.
wilson
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Jan 12, 2007
Why are two log files generated when using a Text Log Provider with a Connection String property set to the following expression?
"c:\" + @[System::ExecutionInstanceGUID] + ".log"
I've set up package logging with a view to getting a unique, and linkable log. However, two files are always generated, no matter what the DelayValidation settings may be on the connection manager, file, and package tasks.
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Jun 13, 2001
Hi.
Is there a way to supress a system generated error messages?
I have a stored procedure that I'm executing from Query Analyzer that updates a table and potentially generates a foreign key violation. I am trapping and handling the error, but the system generated message still displays. Is there a way to supress these messages (other than pre-checking for the condition prior to updating)?
Thanks,
Glen Smith
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Nov 18, 2013
I need to be able to verify that SSMS recognizes ONLY system generated session identifiers.
Where in the configuration of the DBMS can i see evidence of this setting, and / or change it if necessary?
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Jan 17, 2013
I have been searching for a means to change the System Failure Error Check policy that comes as part of the Best Practice policies. I want to look back 24 hours. The WQL query shipped with the policy doesn't have a WHERE clause component that looks at TimeGenerated. That query looks like:
IsNull(ExecuteWql('Numeric', 'rootCIMV2', 'select EventCode from Win32_NTLogEvent where EventCode=6008 and Logfile="System"'), 0)
After searching for an example of how to do this and not finding any that are specific to PBM, I decided to fall back to a very basic approach - use wbemtest.exe to try out where clause additions and see how they work, then plug the result into the policy and see if it works. As a start, I tried the following query using wbemtest.exe:
select Event Code
from Win32_NTLogEvent
where EventCode = 6008
and Logfile = 'System'
and TimeGenerated > '20130101010000.000000–000'
This works great in wbemtest.exe. My next step was to plug this into the policy condition expression as follows: IsNull(ExecuteWql ('Numeric', 'rootCIMV2', 'select EventCode from Win32_NTLogEvent where EventCode=6008 and Logfile="System" and TimeGenerated > "20130101010000.000000–000"'), 0)
When I try to manually evaluate this policy in SSMS, I receive an "Invalid Query" error message.I assume that SWbemDateTime isn't available to use inside Policy Based Management policies. All the examples of how to handle the kind of dynamic date creation I have seen are for use in PowerShell, VBScript, or SSIS. I've played with using DateDiff, DateAdd, and GetDate inside the query string, with no success.
Why does the ExecuteWql above fail?Is it at all possible to dynamically generate a datetime (say, 24 hours ago) as part of the query string parameter of the ExecuteWql call?What might that look like?
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Jan 17, 2006
Hi,Is het possible to find information about indexes in SQL Server 2000?Information like pad index, fill factor, index fields, SortinTempdb?Gr,Hennie
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Jul 15, 1998
I have come across a user that has error 2525 errors on sysobjects tables throughout their SQL 6.5 system. The ids match and I can identify the index. But as they are system tables I cannot drop or rebuild the indexes.
Any ideas please?
The errors have been occuring for some time, so it is not an option to restore. I would like to avoid having to transfer data to and from another SQL Server.
Many Thanks
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Jun 26, 2002
Hi,
Can anybody help me how to Stop this 'System Creation Indexes' (Index Name like 'WA%')?.
Is there any method is available to delete the Existing 'System Indexes'?.
thanks,
Srini
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Apr 26, 2000
Anyone know how to place additional indexes on system tables?
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Nov 19, 1998
hi, if exists (select * from sysobjects where id = object_id('dbo.MRDD_FINAL') and sysstat & 0xf = 3)
drop table dbo.MRDD_FINAL
This code was generated when I used the create a script to build a table from an existing table.
is there a way to check if a a table contains data or not,
The whole idea is to check if table A contains data, I need to truncate the table,otherwise I do nothing...
regards
Ali
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Jan 17, 2007
Hi,
We have a client that has a large (5Gb) database replicated to 13 subscribers, the publisher is Sql 2005, the subscribers are Sql Express. The publication has as few filtered articles too. I have found that after several months of continuous running Replication Monitor is taking a long time to report history on each subscriber.
Do people tend to rebuild the indexes on the system merge replication tables on production servers, or should the standard replication jobs take care of this?
Thanks for your help
Graham
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May 23, 2008
Hello
I tried the Beta 1 of the service pack 1 to .net 3.5. If I try to add an entity (and try to save this), I get the Exception "No support for server-generated keys and server-generated values".
How can I add entities to my Sqlce- database?
I tried to give the id- column (primary key) in the database an identity, another time without identity, only primary key --> none of them worked. I always get the same error.
What do I have to change to make successfully a SaveChanges()?
Thanks for your help,
Gerald
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Jul 1, 2014
I'm working to improve performance on a database I've inherited, and there are several thousand indexes. I've got a list of ones which should definitely exist within the database, and I'm looking to strip out all the others and start fresh, though this list is still quite large (1000 or so).
Is there a way I can remove all the indexes that are not in my list without too much trouble? I.e. without having to manually go through them all individually. The list is currently in a csv file.
I'm looking to either automate the removal of indexes not in the list, or possibly to generate the Create statements for the indexes on the list and simply remove all indexes and then run these statements.
As an aside, when trying to list all indexes in the database, I've found various scripts to do this, but found they all seem to produce differing results. What is the best script to list all indexes?
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Aug 21, 2006
I have created a windows library control that accesses a local sql database
I tried the following strings for connecting
Dim connectionString As String = "Data Source=localhostSQLEXPRESS;Initial Catalog=TimeSheet;Trusted_Connection = true"
Dim connectionString As String = "Data Source=localhostSQLEXPRESS;Initial Catalog=TimeSheet;Integrated Security=SSPI"
I am not running the webpage in a virtual directory but in
C:Inetpubwwwrootusercontrol
and I have a simple index.html that tries to read from an sql db but throws
the error
System.Security.SecurityException: Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet)
at System.Security.PermissionSet.Demand()
at System.Data.Common.DbConnectionOptions.DemandPermission()
at System.Data.SqlClient.SqlConnection.PermissionDemand()
at System.Data.SqlClient.SqlConnectionFactory.PermissionDemand(DbConnection outerConnection)
at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection,
etc etc
The action that failed was:
Demand
The type of the first permission that failed was:
System.Data.SqlClient.SqlClientPermission
The Zone of the assembly that failed was:
Trusted
I looked into the .net config utility but it says unrestricted and I tried adding it to the trusted internet zones in ie options security
I think that a windows form connecting to a sql database running in a webpage should be simple
to configure what am I missing?
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Sep 18, 2007
So I'm reading http://www.sql-server-performance.com/tips/clustered_indexes_p2.aspx and I come across this:
When selecting a column to base your clustered index on, try to avoid columns that are frequently updated. Every time that a column used for a clustered index is modified, all of the non-clustered indexes must also be updated, creating additional overhead. [6.5, 7.0, 2000, 2005] Updated 3-5-2004
Does this mean if I have say a table called Item with a clustered index on a column in it called itemaddeddate, and several non-clustered indexes associated with that table, that if a record gets modified and it's itemaddeddate value changes, that ALL my indexes on that table will get rebuilt? Or is it referring to the table structure changing?
If so does this "pseudocode" example also cause this to occur:
sqlstring="select * from item where itemid=12345"
rs.open sqlstring, etc, etc, etc
rs.Fields("ItemName")="My New Item Name"
rs.Fields("ItemPrice")=1.00
rs.Update
Note I didn't explicitly change the value of rs.fields("ItemAddedDate")...does rs.Fields("ItemAddedDate")=rs.Fields("ItemAddedDate") occur implicitly, which would force the rebuild of all the non-clustered indexes?
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Jun 25, 2015
I have a requirement to only rebuild the Clustered Indexes in the table ignoring the non clustered indexes as those are taken care of by the Clustered indexes.
In order to do that, I have taken the records based on the fragmentation %.
But unable to come up with a logic to only consider rebuilding the clustered indexes in the table.
create table #fragmentation
(
FragIndexId BigInt Identity(1,1),
--IDENTITY(int, 1, 1) AS FragIndexId,
DBNAME nvarchar(4000),
TableName nvarchar(4000),
[Code] ....
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Sep 17, 2006
What is the difference please?
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Mar 21, 2007
Reporting services is configured to use a custom security extension in the following Environment.
Windows xp
IIS 5.0
when i go to http://servername/reports , the UIlogon.aspx page loads fine and i enter username and password. but i get logon failed.
when i go to http://servername/reportserver , the logon.aspx does not load and i get the following error message :
"Request for the permission of type 'System.Web.AspNetHostingPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed."
any idea ? .
chi
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Apr 3, 2007
Ok guys, I am trying to install Sql server 2005 on Vista but I am still stuck with this warning message in the System Configuration Check during Sql server 2K5 installation :
SQL Server Edition Operating System Compatibility (Warning)
Messages
* SQL Server Edition Operating System Compatibility
* Some components of this edition of SQL Server are not supported on this operating system. For details, see 'Hardware and Software Requirements for Installing SQL Server 2005' in Microsoft SQL Server Books Online.
Now, I know I need to install SP2 but how the hell I am going to install SP2 if Sql server 2005 doesn't install any of the components including Sql server Database services, Analysus services, Reporting integration services( only the workstation component is available for installation)?
Any work around for this issue?
P.S.: I didn't install VS.NET 2005 yet, can this solve the problem?
Thanks.
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Jan 29, 2007
Hello!
Hopefully someone can help me.
I have scripts to refresh database as SQL daily jobs. (O.S is Win2K3 and SQL server 2000 and SP4) It was worked and I got the following message this morning from SQL error log.
Internal I/O request 0x5FDA3C50: Op: Read, pBuffer: 0x0D860000, Size: 65536, Position: 25534864896, RetryCount: 10, UMS: Internal: 0x483099C8, InternalHigh: 0x0, Offset: 0xF1FF1E00, OffsetHigh: 0x5, m_buf: 0x0D860000, m_len: 65536, m_actualBytes: 0, m_errcode: 1450, BackupFile: \XAPROD12MASTERXAPRODXAPROD_db_200701290000.BAK
BackupMedium::ReportIoError: read failure on backup device '\XAPROD12MASTERXAPRODXAPROD_db_200701290000.BAK'. Operating system error 1450(Insufficient system resources exist to complete the requested service.).
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Jul 20, 2005
Hi All,I use Bulk insert to put data to myTable.When the SQL server is in local machin, it works well. But when I putthe data in a sql server situated not locally, then I get a errormessage like this:Could not bulk insert because file 'C:Data2003txtfilesabif_20031130.txt' could not be opened. Operating systemerror code 3(The system cannot find the path specified.).BULK INSERT myTableFROM 'C:Data2003 txtfilesabif_20031130.txt'with (-- codepage = ' + char(39) + 'ACP' + char(39) + ',fieldterminator = ';',rowterminator = '',keepnulls,maxerrors=0)Someone can explan me what the error shows upThanks in advance- Loi -
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Jul 5, 2007
Hello,
I am getting the following error from my SqlClr proc. I am using a third party API, which is making call to some webservice.
System.InvalidOperationException: There is an error in XML document (11, 2). ---> System.ArgumentException: Item has already been added. Key in dictionary: 'urn:iControl:Common.ULong64' Key being added: 'urn:iControl:Common.ULong64'
System.ArgumentException:
at System.Collections.Hashtable.Insert(Object key, Object nvalue, Boolean add)
at System.Collections.Hashtable.Add(Object key, Object value)
at System.Xml.Serialization.XmlSerializationReader.AddReadCallback(String name, String ns, Type type, XmlSerializationReadCallback read)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReader1.InitCallbacks()
at System.Xml.Serialization.XmlSerializationReader.ReadReferencingElement(String name, String ns, Boolean elementCanBeType, String& fixupReference)
at System.Xml.Serialization.XmlSerializationReader.ReadReferencingElement(String name, String ns, String& fixupReference)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReader1.Read5926_get_failover_stateResponse()
at Microsoft.Xml.Serialization.GeneratedAssembly.ArrayOfObjectSerializer8221.Deserialize(XmlSerializationReader reader)
at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, Xml
...
System.InvalidOperationException:
at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events)
at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle)
at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at iControl.SystemFailover.get_failover_state()
at F5CacheManager.GetActiveLBIPaddress()
Found a similar problem in a different thread, but couldn't find any solution. I was wondering if there is an open case for this issue?
https://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=398142&SiteID=1
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Jul 20, 2005
Hi,I have a few things on my databases which seem to be neither true systemobjects or user objects - notably a table called 'dtproperties' (createdby Enterprise manager as I understand, relating to relationship graphingor something) and some stored procs begining with "dt_" (some kind ofsource control stuff, possible visual studio related). These show up whenI use"exec sp_help 'databaseName'"but not in Ent. Mgr. or in Query Analyzer's object browser, and also notin a third party tool I use called AdeptSQL. I am wondering how thosetools know to differentiate between these types of quasi-system objects,and my real user data. (This is for the purpose of a customized schemagenerator I am writing). I'd prefer to determine this info with systemstored procs (ie sp_help, sp_helptex, sp_...etc) but will dip into thesystem tables if needed.Thanks,Dave
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Jun 21, 2006
Where is the sql generated by aspnet_regsql.exe saved?
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Oct 1, 2004
Hi,
How can I retrieve generated identity value after insert a row into table in case I can identify inserted row?
(the INSERT statement is dynamic constructed and queried from data access layer, not in stored procedure)
Thanks,
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Oct 3, 2004
Hi,
How can I retrieve generated identity value after insert a row into table in case I can identify inserted row?
(the INSERT statement is dynamic constructed and queried from data access layer, not in stored procedure)
Thanks,
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Feb 7, 2007
Hello,
I've a problem with auto-generated key. In my parent table, some lines have been deleted. I would like to add new lines with the same content in order to restore my database, but I cannot decide on the id value which is an auto-generated key. Is there a solution to set an auto-generated key with a specific value ?
Thank you in advance,
regards,
mathmax
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Sep 27, 2007
Suppose I want to generate a table as below
No. Col1 Col2
1 100 Alan
2 110 Alan
3 120 Alan
In Column I there is a sequence of numbers from 1 to 3 with a step of 1
In Column 2 there is a sequence of numbers from 100 to 120 with a step of 2
In Column 3 there is a name that is repeated accross the whole column
Can I generate such a table with just a single SQL Statement . I don't see any reason why it should not be possible. We know the logic to generate all the numbers of every row. It would be possible using a while loop , but that is be tedious and I am looking for a better way.
One application I can think of is, Suppose I want to find out all deleted primary key ids from a table or say if I have a set
(1,2,3, 7,8,9) , and wish to know the missing numbers in the range 1 to 9. If an sql like above is possible I could use it in a left join to get me the desired output.
Could anyone tell me if it is possible and if not , why not ?
Thanks,
Alec
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May 2, 2008
Hi,
Is there any way to look at behind-the-scene SQL query that gets generated by SSRS engine to pull the data out of the data source (particularly SQL Server).
So far, I only know that you can see the query generated by semantic query engine by changing trace option in configuration file.
Thanks and Regards,
XL
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Aug 28, 2007
Hi
I have a windows application. I am using following code right after setting the LocalReport ReportPath. Report rendering is too slow if use following line of code and Report viewer does not show spiny and the text that says €œReport is being generated.€?
Me.ReportViewer1.SetDisplayMode(DisplayMode.PrintLayout)
Me.ReportViewer1.ZoomMode = ZoomMode.Percent
Me.ReportViewer1.ZoomPercent = 80
Please advise how can make it fast and show spiny.
Thanks in advance.
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Aug 17, 2006
I have created a report and deployed it successfully to a seperate machine with SSRS on. Both my dev machine and the SSRS machine are in the same workgroup. I can then Browse to the Report Manager though IE and click & run the report (The connection is using integrated security). The report requires a single parameter to be entered which once done works successfully. The report has a single table, an inbedded image and a few static fields in the report header.
If I however add a report viewer control to an aspx test form all is not well. As soon as the page opens I am prompted to enter the parameter which is good news as it shows there has been some communication with the SSRS metabase. I then click the view report button. Using Profiler I have proved that the report Stored Proc. is running with the correct parameter value. The report viewer however seems to hang and only displays "Report is being generated" without displaying the results. It does this even with a timeout set of 1000ms.
I don't think this is a security issue as both the Report Manager works and the test form prompts me for the parameter and effectively runs the report SP. I can only assume it is a problem with returning the report to the browser.
Does anyone have any insight?
Regards
Anthony Kay
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Apr 13, 2006
Hi,
I created a PDA application with a database, which has a table with a uniqueidentifier field and primarykey.
While doing the bulk insert from dataset into sql mobile database, It is inserting the record but it is not inserting the id which was entered into the sql server 2005 database, instead the id by creating a new id and the code is as below.
conAdap = new SqlCeDataAdapter(strQuery, conSqlceConnection);
SqlCeCommandBuilder cmdBuilder = new SqlCeCommandBuilder(conAdap);
conAdap.Fill(dsData);
int r =conAdap.Update(dsData);
Please help me.
Thank you,
Prashant
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