AspAlliance.com LogoASPAlliance: Articles, reviews, and samples for .NET Developers
URL:
http://aspalliance.com/articleViewer.aspx?aId=1891&pId=-1
Pass Tables to Stored Procedure / Table Valued Parameter
page
by Aamod Thakur
Feedback
Average Rating: This article has not yet been rated.
Views (Total / Last 10 Days): 138531/ 212

Introduction

When we have to pass multiple rows of data to SQL Server the developers either have to send one row at a time or come up with other workarounds to meet requirements like using XML datatype to pass data which is a bit complex and tedious to use. Also there is a SQLBulkCopy object available in .Net to send multiple rows of data to SQL Server at once, but the data still can not be passed to a stored procedure.

Table-Valued Parameters


SQL Server 2008 Provides a New Feature Called Table-Valued Parameters

This provides us to easily pass a table to a stored procedure from T-SQL code or from an application as a parameter.

We first need to create a user defined type

Database Node > Programmability > Types > User-Defined Table Types

Script to create a User-Defined Table type

--Create User-defined Table Type
 CREATE TYPE dbo.MessageQueue AS TABLE 
 (
    id int PRIMARY KEY, 
    MessageType varchar(20) NOT NULL,  
    MessageContent varchar(1000) NOT NULL,
    PushDate datetime NOT NULL DEFAULT GETDATE()
 )
 GO
 
 --Using the User-Defined Table Type
 DECLARE @MyMessageQueue MessageQueue
 
 INSERT INTO @MyMessageQueue(id ,MessageType,MessageContent,PushDate)
 VALUES (1,'SMS','Hello World','2009-09-30 10:00:00'),
          (2,'SMS','Hello World','2009-09-30 10:00:00'),
          (3,'MMS','Happy Diwali','2009-10-17 10:00:00')
 
 -- Select the inserted records using new type
 SELECT * FROM @MyMessageQueue 

Using the Variable as a Parameter

The benefit of User-Defined Table Type is that it can be passed to a stored procedure. Below is an example of using the newly created type with stored procedure

Using the user defined table type in Stored Procedure

CREATE TABLE [dbo].[MyMessageTable] 
 (
 id [intPRIMARY KEY,
 MessageType varchar(20) NULL,
 MessageContent varchar(1000) NOT NULL,
 PushDate datetime NULL,
 EngineID int  NOT NULL
 ) 
 GO
 
 CREATE PROCEDURE usp_InsertMessages 
 @MyParameter MessageQueue READONLY,
 @EngineId varchar(20)
  AS
 INSERT INTO MyMessageTable(id,MessageType,MessageContent,PushDate,EngineID)
 
 SELECT id,MessageType,MessageContent,PushDate,@EngineId
 FROM @MyParameter 
 
 --<where condition if any> for the table valued parameter
 
 GO
 
 --Using the User-Defined Table Type in stored procedure
 
 DECLARE @MyMessageQueue MessageQueue
 
 INSERT INTO @MyMessageQueue(id ,MessageType,MessageContent,PushDate)
 VALUES (1,'SMS','Hello World','2009-09-30 10:00:00'),
          (2,'SMS','Hello World','2009-09-30 10:00:00'),
          (3,'MMS','Happy Diwali','2009-10-17 10:00:00')
 
 EXEC usp_InsertMessages @MyMessageQueue,007
 
 -- Select the records inserted using Stored procedure
 SELECT * FROM MyMessageTable 

 

In order to use the user defined type user must have execute permission on the type. if user doesn't have execute permission on the same,it can be granted using below statement:

GRANT EXECUTE ON TYPE::dbo.MessageQueue TO <User Name>;

I will be providing the C# code for this article for using this feature in .NET applications in next article or you can refer below mentioned MSDN article link for more details

 

References

References - View this article on My Blog , MSDN Article

 

Happy Coding!!! Happy Reading!!!

~Aamod

[Microsoft Certified Technology Specialist - SQL Server 2005]

 



©Copyright 1998-2020 ASPAlliance.com  |  Page Processed at 2020-08-03 11:13:57 PM  AspAlliance Recent Articles RSS Feed
About ASPAlliance | Newsgroups | Advertise | Authors | Email Lists | Feedback | Link To Us | Privacy | Search