Re:

On Wed, 2003-10-01 at 11:32, Daniel Schuchardt wrote:
> Read the docs...
>
> Hm looking towards the doks thats the right behavoir. Also from the
> logical point thats the right behavoir. But I don't like it. The CAST
> should return an empty string in that case (looking from the practical
> standpoint).

All CAST is doing is changing the type of the datum; it does not change
its value except perhaps as a side effect.  A null string is not the
same as an empty string.  I don't at all see why you should expect
anything different, especially when the COALESCE() function is already
provided to do exactly what you want.

--
Oliver Elphick                                Oliver.Elphick@lfix.co.uk
Isle of Wight, UK                             http://www.lfix.co.uk/oliver
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