This statement allows you to throw an exception caught in the exception handling block. SQL Server 2012 introduces the third statement in relation to handling errors: THROW.
#Adventureworks2012 employee table stored proc code
Exceptions provide a clean way to check for errors without cluttering code.Note – Exception handling using the TRY and CATCH statements is the common way that modern programming languages like C# and Java treat errors.Įxception handling with the TRY and CATCH blocks gives a programmer a lot of benefits, such as: This program part is denoted by the keyword CATCH and is therefore called the CATCH block. (Because this process usually comprises several statements, the term “TRY block” typically is used instead of “TRY statement.”) If an exception occurs within the TRY block, the part of the system called the exception handler delivers the exception to the other part of the program, which will handle the exception. The role of the TRY statement is to capture the exception. For this reason, the existing problem will be relegated to another part of the program, which will handle the exception.
With such a problem, you cannot continue processing because there is not enough information needed to handle the problem. This section first explains what “exception” means and then discusses how these two statements work.Īn exception is a problem (usually an error) that prevents the continuation of a program. Example 13.1 shows the use of this variable.) Starting with SQL Server 2005, you can capture and handle exceptions using two statements, TRY and CATCH. (You can handle errors using the global variable. Versions of SQL Server previous to SQL Server 2005 required error handling code after every Transact-SQL statement that might produce an error.
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