Cannot create assembly referencing system.core v3.5.0.0

Question

Cannot create assembly referencing system.core v3.5.0.0

lstessel

SSC Veteran

Points: 201
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September 5, 2008 at 8:18 am

#382529

Hi,
We have developed a number of components implementing business logic in .Net 3.5 and using VS 2008. One of those components is a DLL implementing interpolation methods and it has a reference to System.core as it uses Linq. It is signed with a private key.
I would like to be able to use this functionality from a UDF and\or stored procedure in SQL Server 2005. I have copied all the referenced assemblies in the same folder as the DLL on the server, including the System.core.dll. I tried to create the assembly using the following T-SQL statement:
CREATE ASSEMBLY [AssemblyName]
AUTHORIZATION [dbo]
FROM 'path to assembly files'
WITH PERMISSION_SET = SAFE
This returns the following error:
Warning: The Microsoft .Net frameworks assembly 'system.core, version=3.5.0.0, culture=neutral, publickeytoken=b77a5c561934e089, processorarchitecture=msil.' you are registering is not fully tested in SQL Server hosted environment.
Msg 6218, Level 16, State 2, Line 1
CREATE ASSEMBLY for assembly 'AssemblyName' failed because assembly 'System.Core' failed verification. Check if the referenced assemblies are up-to-date and trusted (for external_access or unsafe) to execute in the database. CLR Verifier error messages if any will follow this message
[ : System.Diagnostics.Eventing.EventProvider::EtwRegister][mdToken=0x600003b][offset 0x0000003D][found Native Int][expected unmanaged pointer] Unexpected type on the stack.
[ : System.Diagnostics.Eventing.EventProvider::EncodeObject][mdToken=0x6000046][offset 0x00000000] Unmanaged pointers are not a verifiable type.
[ : System.Diagnostics.Eventing.EventProvider::WriteMessageEvent][mdToken=0x6000047][offset 0x0000003C][found ref 'System.String'] Expected numeric type on the stack.
[ : System.Diagnostics.Eventing.EventProvider::WriteEvent][mdToken=0x6000049][offset 0x0000012E] Instruction cannot be verified.
[ : System.Diagnostics.Eventing.EventProvider::WriteEvent][mdToken=0x6000049][offset 0x00000030] Instruction cannot be verified.
[ : System.Diagnostics.Eventing.EventProvider::WriteEvent][mdToken=0x600004a][offset 0x0000005F][found ref 'System.String'] Expected numeric type on the stack.
[ : System.Diagnostics.Eventing.EventProvider::WriteEvent][mdToken=0x600004b][offset 0x00000010][found unmanaged pointer][expected unmanaged pointer] Unexpected type on the stack.
[ : System.Diagnostics.Eventing.EventProvider::WriteTransferEvent][mdToken=0x600004c][offset 0x0000007D] Instruction cannot be verified.
[ : System.Diagnostics.Eventing.EventProvider::WriteTransferEvent][mdToken=0x600004c][offset 0x00000309][found Native Int][expected unmanaged pointer] Unexpected type on the stack.
[ : System.Diagnostics.Eventing.EventProvider::WriteTransferEvent][mdToken=0x600004d][offset 0x0000001B][found unmanaged pointer][expected unmanaged pointer] Unexpected type on the stack.
[ : System.Linq.Expressions.ExpressionCompiler::GenerateLambda][mdToken=0x6000374][offset 0x00000046] Unable to resolve token.
[ : System.Security.C...
The only resolution that was suggested was to use PERMISSION_SET = UNSAFE and set the database to TRUSTWORTHY which I don't want to do.
Is there any other solution to this?
Many thanks in advance.
Laurence

Viewing 4 posts - 1 through 3 (of 3 total)

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Jonathan Kehayias One Orange Chip Points: 26778 More actions · Answer 1

Abstract the logic that you want to use inside SQL Server to a new assembly and restrict it to the approved assembly list only. That is the only alternative to registering the unapproved .NET DLL's as UNSAFE in the Database.

Jack Corbett SSC Guru Points: 184393 More actions · Answer 2

I had thought that in SQL Server 2005 the CLR was only .NET 2.0 compliant so that 3.5 assemblies will not work, thus no Linq availability. I could be wrong.

Jack Corbett
Consultant - Straight Path Solutions
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Paul_J Hall of Fame Points: 3698 More actions · Answer 3

I know that it's possible to use .NET 3.0 assemblies (to call a WCF service for example) but as far as I know they haven't been tested so the same would probably go for .NET 3.5. Perhaps you could re-write the linq stuff to not use linq (unless there is way too much of it).