Read this blog post which explains what sql_text is:
Understanding the sql_text Action in Extended Events
In SQL Server 2008 there is no SQL Batch Completed Event, this was only added in SQL Server 2012, so if you need that level of granularity, you need to go back to SQL Trace in SQL Server 2008.
Jonathan Kehayias | Principal Consultant | MCM: SQL Server 2008
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Troubleshooting SQL Server: A Guide for Accidental DBAs[/url]