Read PDF Microsoft SQL Server 2005 Stored Procedure Programming in T-SQL & .NET

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Click "Add". Listing After successful build it will produce a. Currency table that has three columns out of which we will be passing values for two as input parameters.

Stairway to SQLCLR Level 1: What is SQLCLR?

Currency table, the third column, that is a date column, will be passed the GetDate function. Once deployed SQL Server uses it like any other. Select the SQL database if you don't have this database then you can use any database of your choice and click on "New Query", it will open a new blank query window. In the opened query window put the code as shown in Listing It should execute the command successfully.

Step 1 - CLR code

It will show the objects under Programmability and Assemblies in the Object Browser as shown in Figure First we need to register an assembly that we created in C with our own given name inside SQL Server. Second, we need to create the Stored Procedure that will basically invoke the Stored Procedure we have created of C assembly. Next we set the input parameters that were being passed to the C function refer to Listing In the query window add the code as shown in Listing to execute the procedure and add a currency. I know there is no such currency for the United States.

Adding a duplicate value to the Sales. Currency table for CurrencyCode column. You will get an exception as shown in Figure Vidya Vrat Agarwal Dec 08 It became obvious that we have two choices to implement the same functionality, but based on your scenario and requirements one can be advantageous over the other one. A few important points that will help you to decide what you may want to choose and in what situation are:. Since this is a Stored Procedure coded in C and would be inserting currency data into the AdventureWorks.

In this exercise, you'll deploy the created assembly into the SQLDb database, and upon execution, this will insert currency into the AdventureWorks. This entire deployment process is a two-step process. Custom Types: You can create your own User-Defined Type UDT to handle complex data and include methods and properties that make use of the data you store in them. Properties and methods of UDTs are accessed in the same way that the ".

You can then have a validation method that verifies the PostalCode format for the specified Country and returns a BIT as well as a property that returns the full Country Name assuming you are only storing the 2-character ISO code. This means that if you have a Stored Procedure that returns multiple result sets and you only want one of them, you can do that rather easily in SQLCLR.

In fact, you can even manipulate the result set if you want. You can add or remove fields, or rename fields, or even combine 2 or more result sets into a single result set.

Writing CLR Stored Procedures in C# - Introduction to C# (Part 1) -

There are not many scenarios in which one would want to share data across sessions usually to cache data between connections , but if it is needed, the only way to do this in T-SQL is via a global temporary table or a real table. Just like with multi-threading, this should only be done with much caution and testing as whatever memory is used for caching is taken away from query processing. The next four items cannot be done in T-SQL functions, at least not explicitly. However, each of them can be done more easily—to varying degrees—in. Hence, if you need to generate those types of values but don't need any other CLR-specific functionality, then stick with the view work-around.

To begin with, you can really only compare functionality that is the same between them. Then you have to consider the type of logic being done, is the logic being done efficiently in both types of code, if comparing functions is it being run via a SET statement or a multi-row query, and so on. Microsoft has some guidelines here as to what situations are better suited to CLR-based objects. However, it all comes down to testing and this is all testable. We will take a more detailed look at security later in this series.

NET code itself can only see the types of data that you allow it to see. Functions can explicitly allow or deny the ability to access both user data and system.

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This permission cannot be overridden nor can it bypassed. The SQLCLR code, even if written to access the file system, network, or do something like multi-threading, cannot do any of those things without the Assembly first being granted the appropriate permission. It just refers to the ability to add custom CLR code. So, even with the configuration option of "CLR Enabled" set to 0 i.

The introduction of CLR integration, starting with SQL Server , greatly expanded the possibilities of what can be done within the context of queries. And some operations that cannot possibly be done in T-SQL are now possible.

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  5. In the next article we will take a look at an example Stored Procedure and Scalar Function. You will see how the CLR code, the Assembly, and the wrapper objects relate to each other while testing out many of the new capabilities mentioned in this article. Log in or register to rate. Join the discussion and add your comment. We then build an assembly, store procedure, and a function that can be called from your T-SQL code. Meaning, if there is a multi-step Stored Procedure that needs to be created and part of it either requires, or would at least benefit from,. NET functionality, then usually only the logic that needs the.

    There are good uses and bad uses of this tool, just as there are with cursors and triggers. More on this later.

    SQL Stored Procedures - What They Are, Best Practices, Security, and More...

    Hence you need to format a single command line string and will face the same issue as when creating dynamic SQL, issues such as escaping embedded quotes and converting non-string variables.