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Read/write property supporting the use of the DTSProtectionLevel enumeration. If you use a configuration file to store sensitive information you ll want to secure it somehow. Two different methods are used for encryption. The MS Data Protection API (DPAPI) is used for key-based encryption, while the TripleDES class is used for encryption that is password-based. Possible values are DontSaveSensitive Sensitive information in the package is replaced with blanks before saving.

That s generally a good idea, because SQL Server will override the return value should an error occur within the stored procedure; so output parameters are considered to be a better option for returning scalar values to a client However, should a developer want to implement a return value from this stored procedure, the allowed datatypes are SqlInt32 or SqlInt16..

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The procedure will be implemented as a CLR stored procedure that takes a single parameter containing the name of the command to execute. In the procedure, we execute the command and return any output from it to SQL Server by sending it to the context pipe. The .NET code behind this example is very simple, so we ll run through it very quickly. As in all .NET code, we start with the using directives to import some namespaces so we don t need to refer to all classes by their fully qualified names: using using using using System; System.Diagnostics; System.IO; Microsoft.SqlServer.Server;

EncryptAllWithPassword Using TripleDES, this setting encrypts the package with a simple password. EncryptAllWithUserKey Using DPAPI, this setting encrypts the package using keys based on the user profile. Only the same user using the same profile can load the package. EncryptSensitiveWithPassword Using TripleDES, this setting encrypts only sensitive information contained in the package by using a password. EncryptSensitiveWithUserKey Using DPAPI, this setting encrypts the entire package by using keys based on the current user. Only the same user using the same profile can load the package. If a different user opens the package, the sensitive information is replaced with blanks. ServerStorage Encrypts the package within a SQL Server msdb database. Database roles are used for security.

Most stored procedures will have one or more parameters to allow users to pass in arguments that can tell the stored procedure which data to return. In the case of this particular stored procedure, two parameters will be added in order to facilitate getting data using a date range (one of the requirements outlined in the section Programming a CLR Stored Procedure ). These parameters will be called StartDate and EndDate, and each will be defined as type SqlDateTime. These two parameters are added to the method definition, just like parameters to any C# method: [Microsoft.SqlServer.Server.SqlProcedure] public static void GetSalesPerTerritoryByMonth( SqlDateTime StartDate, SqlDateTime EndDate) { // Put your code here } In this case, these parameters are required input parameters. Output parameters can be defined by using the C# ref (reference) keyword before the datatype. This will then allow developers to use SQL Server s OUTPUT keyword in order to get back scalar values from the stored procedure. Unfortunately, neither optional parameters nor default parameter values are currently supported by CLR stored procedures.

changed, the digital signature is broken, and the detection of any change is therefore possible by checking the signature. The first requirement to enable the signing of a package is to obtain a special file called a certificate. The first step is to select Digital Signing . . . from the SSIS menu in the IDE to display the screen shown in Figure 13-1.

At this point, the stored procedure is syntactically complete and could be deployed as is; but of course, it wouldn t do anything! It s time to code the meat of the procedure. But first, it s good to take a step back and figure out what it should do.

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