Bruce Momjian wrote:
>Oliver Elphick wrote:
>
>> Andrzej Mazurkiewicz wrote:
>> >> And what is MATCH FULL?
>> > [Andrzej Mazurkiewicz] I would not like to speculate perhaps
>> >somebody else knows exact answer.
>>
>> MATCH FULL:
>> Either all referencing columns must be null, or all must have values.
>>
>> MATCH PARTIAL:
>> "if any columns are non-null, there must be at least one row in the
>> referenced table that could satisfy the constraint if the other null
>> values were correctly substituted."
>
> As I read the SQL3 spec draft, it's that if at least one
> of the columns is NULL, no check is done at all.
What I quoted was based on SQL92. Perhaps it has been changed?
> Could be wrong, will lookup at Thursday when back in
> Hamburg.
>
>
>Jan from Philly
Is this really you, Bruce?
--
Oliver Elphick Oliver.Elphick@lfix.co.uk
Isle of Wight http://www.lfix.co.uk/oliver
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"Go ye therefore, and teach all nations, baptizing them
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Holy Ghost; Teaching them to observe all things
whatsoever I have commanded you; and, lo, I am with
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Matthew 28:19,20
