How Can I Effectively Halt SQL Server Script Execution During Validation or Lookup Processes?

Strategies for Interrupting SQL Server Script Execution

Stopping a SQL Server script mid-execution is often necessary, particularly during validation or data lookup operations. Here are effective methods to achieve this:

1. The raiserror Approach:

The raiserror statement offers a powerful way to halt script execution. Using the following syntax:

<code class="language-sql">raiserror('Critical error encountered', 20, -1) with log</code>

Setting the severity level to 20 (or higher) and including WITH LOG will terminate the script and record the error in the SQL Server log.

2. Leveraging the noexec Option:

This method works in conjunction with GO statements. Setting noexec on prevents subsequent commands from executing. Remember to turn noexec off before resuming execution.

Illustrative Example Combining Both Methods:

<code class="language-sql">print 'Starting script execution...'
go

print 'Fatal error detected, script will terminate!'
-- Method 1: Raiserror
raiserror('Critical error encountered', 20, -1) with log

-- Method 2: Noexec
set noexec on

print 'This message will not be printed.'
go

-- Re-enable execution (necessary in SSMS for script re-run)
set noexec off</code>

Important Considerations:

• raiserror necessitates administrator privileges and closes the database connection.
• noexec doesn't close the connection but requires explicitly re-enabling execution.
• When running from sqlcmd.exe, a 2745 exit code indicates script termination.

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