Skip to main content

Call User-defined Function on Linked Server :SQL Server




If you try to invoke a user-defined function (UDF) through a linked server in SQL Server by using a "four-part naming" convention (server.database.dbo.Function), you may receive error message. 

The reason is User-defined function calls inside a four-part linked server query are not supported in SQL Server. Thats why error message indicates that the syntax of a Transact-SQL statement is incorrect. 

To work around this problem, use the Openquery function instead of the four-part naming convention. For example, instead of the following query

Select * from Linked_Server.database.dbo.Function(10)

run a query with the Openquery function:

Select * from Openquery(Linked_Server,'select database.dbo.Function(10)')

If the user-defined function takes variable or scalar parameters, you can use the sp_executesql stored procedure to avoid this behavior. 
For example:

exec Linked_Server.database.dbo.sp_executesql N'SELECT 
database.dbo.Function(@input)',N'@input int',@input=10

but if you want to use it in a select statement (within some Stored Procedure), then this EXEC command will create some problems for you :)
However this could be resolve easily by creating a user-defined function in your database (not the linked server one)

CREATE FUNCTION [dbo].Function_Name(@Parameter INT) 

RETURNS VARCHAR(8000)

AS

BEGIN

DECLARE @word sysname

EXEC LinkedServer.DatabaseName.dbo.sp_executesql

N'SELECT DatabaseName.dbo.Function_Name(@Parameter)' --dynamic sql query to execute

,N'@Parameter int' --parameter definitions

,@Parameter=@word OUTPUT --assigning the caller procs local variable to the dynamic parameter

RETURN @word

END

Comments

  1. The last code snipet is INCORRECT that is not possible

    ReplyDelete
  2. Its a working sample. I have used it myself in SQL Server 2005.

    ReplyDelete
  3. Didnt work for me on SQL Server 2008

    ReplyDelete
  4. Remote function calls are not allowed within a function.

    ReplyDelete
  5. I get the error Remote function calls are not allowed within a function

    ReplyDelete

Post a Comment

Popular posts from this blog

Microsoft SQL Server 2005 Service Pack 3 for Windows 7 (64 bit)

You can download from here

Microsoft SQL Server 2005 Service Pack 3
OverviewService Pack 3 for Microsoft SQL Server 2005 is now available. SQL Server 2005 service packs are cumulative, and this service pack upgrades all service levels of SQL Server 2005 to SP3. You can use these packages to upgrade any of the following SQL Server 2005 editions:
Enterprise Enterprise Evaluation Developer Standard Workgroup

Download Size:
326.0 MB
http://www.microsoft.com/downloads/details.aspx?FamilyID=ae7387c3-348c-4faa-8ae5-949fdfbe59c4&displaylang=en


Microsoft SQL Server Management Studio Express Service Pack 3
OverviewMicrosoft SQL Server Management Studio Express (SSMSE) is a free, easy-to-use graphical management tool for managing SQL Server 2005 Express Edition and SQL Server 2005 Express Edition with Advanced Services. SSMSE can also manage instances of the SQL Server Database Engine created by any edition of SQL Server 2005.

Note: SSMSE cannot manage SQL Server Analysis Services, In…

Max Length not working for Multi Line Text Box : Solution

In almost all the web projects, we require a multiline TextBox control. It was annoying to find that maxLength property doesn't work on multiline textboxes. There is a workaround to accomplish this using RegularExpressionValidator. Following is the markup that will restrict the text box to maximum of 500 characters.







OR You it can be done so easily using javascript functions.



I suggest that we should put a javascript validator function so that user will not be able to enter characters more than the length specified, even cant paste any text with more than specified characters. Here are those javascript functions.



TextBox Control




Javascript:



// Keep user from entering more than maxLength characters function doKeypress(control){ maxLength = control.attributes["maxLength"].value; value = control.value; if(maxLength && value.length > maxLength-1){ event.returnValue = false; maxLength = parseInt(maxLength); } }



// Cancel default…