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  SQL Server Tips by Gama and Naughter

Testing the Code

To test the XP support, a simple SQL Script called “test.sql” is located in the XP_RAND directory. We first must register the XP as per normal. This can be achieved using:

EXEC sp_addextendedproc 'XP_RAND', "XP_RAND.dll"

When we have registered the XP, we can then test out the XP to generate some random character data, using the following TSQL:

DECLARE @RandomData varchar(20)
EXEC master..XP_RAND @RandomData OUTPUT
PRINT @RandomData

Try calling the XP multiple times and observing the different data returned. Also you can change the data type of “RandomData” to generate other types of random data. For example to generate a random 4-byte integer, change the data type to “int”.


The above book excerpt is from:

Super SQL Server Systems
Turbocharge Database Performance with C++ External Procedures

ISBN: 0-9761573-2-2
Joseph Gama, P. J. Naughter

 http://www.rampant-books.com/book_2005_2_sql_server_external_procedures.htm  

 

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