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Microsoft® SQL Server 2008 R2 Unleashed
book

Microsoft® SQL Server 2008 R2 Unleashed

by Ray Rankins, Paul Bertucci, Chris Gallelli, Alex T. Silverstein
September 2010
Intermediate to advanced content levelIntermediate to advanced
1704 pages
111h 8m
English
Sams
Content preview from Microsoft® SQL Server 2008 R2 Unleashed

Using CONTEXT_INFO

Although SQL Server enables you to define local variables within a T-SQL batch or stored procedure, local variables do not retain values between batches or stored procedures. Unfortunately, SQL Server 2008 does not enable you to create user-defined global variables. However, you can simulate global variables by using the CONTEXT_INFO setting, which allows you to store information in the context_info column in the sys.sysprocesses catalog view. A row in sys.sysprocesses exists for every connection to SQL Server, so the data remains there until you disconnect from SQL Server.

The context_info column is a binary (128) column. You can store any data value in it with the SET CONTEXT_INFO command, but you have to deal with hexadecimal ...

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Publisher Resources

ISBN: 9780768696585Purchase book