Unable to create Clustered Index in View due to NONDETERMINISTIC User Defined Function

Posted on 2004-08-09
Last Modified: 2013-11-15
(SQL Server 2000)

I am trying to create a Clustered Index in a View, which contains a field that references a User Defined Functions. I get an error that says "Index on View 'XXXXX' could not be created because the view uses a NONDETERMINISTIC User-Defined Function"

The function is passed a parameter that is a foreign key field for a couple of tables. Basically the function looks up all the records in a certain field, and concatenates them into one string.

The function is:

      (@MappingID int)

RETURNS varchar(2000)


      DECLARE @SQL varchar(2000)
      SET @SQL = ''
      SELECT @SQL = @SQL +
            CASE WHEN Service_Routing_Mapping_Details_XML.XML_Field_Name IS NULL
            THEN Service_Routing_Mapping_Details.FML_Field_Name_To
            ELSE Service_Routing_Mapping_Details.FML_Field_Name_To + '::' + Service_Routing_Mapping_Details_XML.XML_Field_Name
            END + ','
      FROM dbo.Service_Routing_Mapping_Details
      LEFT JOIN dbo.Service_Routing_Mapping_Details_XML
      ON Service_Routing_Mapping_Details.ID = Service_Routing_Mapping_Details_XML.XMLMappingID
      AND Service_Routing_Mapping_Details_XML.Direction = 'TO'
      WHERE Service_Routing_Mapping_Details.Mappingid = @MappingID
      GROUP BY Service_Routing_Mapping_Details.FML_Field_Name_To, Service_Routing_Mapping_Details_XML.XML_Field_Name

      IF LEN(@SQL) > 2
            RETURN LEFT(@SQL,LEN(@SQL) -1)

Question by:BigJ
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
LVL 34

Accepted Solution

arbert earned 500 total points
ID: 11759666
You can't create an Index on a view that uses a function like that.....

Post the view and what are the final results that you're really looking for???

Expert Comment

ID: 11762068
creating a custer index is posible in view
but only on thus field on which parent table has an index.

Amit Jain

Author Comment

ID: 11769986
Amit, I am trying to create an index on a field that, in the underlying table,  has a clustered index. I believe arbert may be correct.

Putting it simply, the view queries a parent table which has a child table. For each record in the parent, the user defined function loops through all corresponding records in the child, and concatenates all the values in a particular field into ONE STRING.

For instance:

Parent Table:

Child Table
FK      textField
1        this
1        is
1        the result
2        blah
2        blah
3        hello
3        world

View Reult:
ID       textField
1        this is the result
2        blah blah
3        hello world

*The PK Key field of the parent table is a clustered index.

Featured Post

Optimizing Cloud Backup for Low Bandwidth

With cloud storage prices going down a growing number of SMBs start to use it for backup storage. Unfortunately, business data volume rarely fits the average Internet speed. This article provides an overview of main Internet speed challenges and reveals backup best practices.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

The article will include the best Data Recovery Tools along with their Features, Capabilities, and their Download Links. Hope you’ll enjoy it and will choose the one as required by you.
Ever wondered why sometimes your SQL Server is slow or unresponsive with connections spiking up but by the time you go in, all is well? The following article will show you how to install and configure a SQL job that will send you email alerts includ…
This tutorial will walk an individual through the steps necessary to install and configure the Windows Server Backup Utility. Directly connect an external storage device such as a USB drive, or CD\DVD burner: If the device is a USB drive, ensure i…
This tutorial will walk an individual through the process of configuring basic necessities in order to use the 2010 version of Data Protection Manager. These include storage, agents, and protection jobs. Launch Data Protection Manager from the deskt…

763 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question