From: Warren Young
Date: September 29 2008 7:08pm
Subject: Re: Bug: cannot insert a Null<sql_blob>
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On Sep 28, 2008, at 7:09 PM, Russell Robinson wrote:

> The offending line is this:
> 	Null<sql_blob>, data);
>
> If I change it to this:
> 	sql_blob, data)
>
> it compiles.

Null<> is not a transparent wrapper.  By adding the wrapper, you have  
added an additional layer of indirection:

	sql_blob a;
	Null<sql_blob> b;

	cout << a.length() << endl;
	cout << b.data.length() << endl;

You're probably not accessing the members of SSQLS.data through this  
second "data" layer.