User-defined Types (UDT) In Typed Dataset

Dec 24, 2006

Hi!

I'm need to use typed Dataset with CLR UDT, but when I'm trying to create TableAdapter in Dataset designer, I'm gettng error message: User-defined data types are not supported in DataSet designer

Is any way to get it working?

My UDT defined in separate assembly as:

[Serializable]
[XmlRoot(Namespace = NS)]
[StructLayout(LayoutKind.Sequential)]
[SqlUserDefinedType(Format.Native, Name = DataType, IsByteOrdered = true, ValidationMethodName = "Validate")]
public struct Coordinate
: INullable,
IXmlSerializable
{
.....
}

Working environment: Visual Studio 2005 SP1, MS SQL 2005 SP1 + Hotfix.

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User Defined Types

Jan 16, 2008

I've been doing some reading on UDT's and have a question...

It was suggested in one of the pieces I read that you could create a UDT for, in their example, cities. And every table that had a reference to city could share this datatype. Now, my initial thought was "wow, what a great idea! I wouldn't have to remember the exact datatype for my primary keys (was it a char(5) or char(6)?) and have a "central depository" for my key datatypes.

So the first question is; what are the disadvantages of such a design?

And the second is; How do you update a UDT? If business requirements change and udt_city needs to be changed from varchar(30) to varchar(60), for example, what would be the way of echoing the change thoughout your database?

My gut reaction for the answers are
1) performance will decrease as effectively the dbms has to "parse" every insert/update to a UDT field in a different method.

2) create a new udt and alter any tables referencing the old one before dropping it.

What do we think?

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Iam trying to create a geo-database.
For that i need to have a spatial data type called polygon which takes in values as int. so it can be declared as:
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How do i do that.
plz help.

---
Iam not real any more
Iam just an Illusion
---

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Apr 13, 2006

Hi!

I have a question about creating a user defined type: I'd like to create a table of employee objects which include objects of the type employee_t. I used this structure before in Oracle 9i and would like to know how it can be done with MS SQL Server 2000 or 2005, preferably with Enteprise Manager/Management Studio. Below is an example.

CREATE TYPE employee_t AS OBJECT (
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...
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CREATE TABLE Employee of employee_t

Regards,

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Oct 9, 2007

I have a UserDefinedType that is Decimal(21,6)

The fields fltValorPendente e fltTotal are of this type. Field intSinal is an Integer.

I execute the following query:
SELECT
(intSinal * fltValorPendente) / fltTotal as Coef,
cast((intSinal * fltValorPendente) as decimal(21,6)) / fltTotal as CoefCast
into tmp
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As a result, table tmp is created with the following structure:
CREATE TABLE [dbo].[tmp](
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How come both fields don't get the same precision?

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Jun 14, 2007

I have a very simple SQL Server 2005 database, nothing fancy except that I use user-defined types (e.g., udt_Name = varchar(20)). I just set up a login for my first user, using Windows authentication, and gave her the following database access:



default schema = dbo

role = db_datareader

role = db_datawriter



Using SQL Server Management Studio, she can open any table; however, every column that is defined with a user-defined type appears with generic column headings (Expr1, Expr2 etc). And when she opens a table in design view, all columns with user-defined types have their Data Type field listed as "invalid type" rather than, say "udt_Name:varchar(20)". I browsed to the "User-defined Data Types" entry in Object Explorer, and it was empty.



In other words, it appears that she is unable to access the user-defined type aliases, even though she has read/write access to the database. As a very temporary work-around, I gave her membership in the database role "db_owner", but this is obviously not an ideal solution.



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Hi there

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Oct 30, 2003

This is part of the codes of a stored procedure:

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This user-defined data type is created in a user database only.

I tried to created the user-defined type into BOTH tempdb and master but same error.

How can i resolove it?
Or it is impossible to use user-defined datatype for table variable?

In the past,
i use this method:
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and cerate udt_PRNum in tempdb only could solve it.

But now i want to use table variable.
It seems NOT work for my situation.

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I like vb, because you don't have to remember whether syntax is upper or lower case. Same is with T-SQL, there's no difference between select * from table and Select * FROM Table. Intellisense would by great, but is not yet implemented .

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****

Thanks.

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Can you have user defined data types in stored procedures.

Store Procedure creation text

CREATE PROCEDURE spStoredproc
@col1 udtcol1,
@col2 udtcol2,
@col3 udtcol3
AS
INSERT INTO tblTempEmployee
(col1 , col2 , Col3)
VALUES (@col1 , @col2, @col3)
GO
SET QUOTED_IDENTIFIER OFF SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER OFF SET ANSI_NULLS OFF
GO

Dave

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Code Snippet
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