MySQL to SQL Server select statement

I am converting mysql sprocs to SQL Server. I've come across a select statement in mysql that I don't quite understand what it's doing and my google-fu/so-fu has failed me. Here is the gist of it:

    SELECT AccountType = dbo.functi开发者_JAVA百科onToGetAccountType() FROM AccountLookup

I don't have the ability to debug the original mysql. I do know that the function only returns a single value.

Is the mysql statement assigning a default value to 'AccountType' in the event there are no rows in the AccountLookup table?

Thanks for your time.

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The select statement is executing the function dbo.functionToGetAccountType() and aliasing the column as AccountType. It could be re-written as:

SELECT dbo.functionToGetAccountType() as AccountType
FROM AccountLookup