On Fri Feb 07, 2020 at 01:45:53PM +0000, David Raymond wrote:
> > CREATE TABLE vocabulary(word TEXT PRIMARY KEY, count INT DEFAULT
> > 1); INSERT INTO vocabulary(word) VALUES('jovial') ON CONFLICT(word)
> > DO UPDATE SET count=count+1;
> >
> > Shouldn't that actually be written as "vocabulary.count+1"?
>
> Nope. Unqualified names there refer to the one and only record that's
> getting updated.
Your edit of my email broke some context. I was actually referring to
the paragraph after the example SQL, where "vocabularly.count" was
given as being equivalent to "count+1".
> Similar to how in an blanket update statement you would do:
> update vocabulary set count = count + 1;
> ...and not:
> update vocabulary set vocabulary.count = vocabulary.count + 1;
>
> I mean, it might still work, but it's not needed, no.
It is needed if you are have a correllated subquery in the UPDATE
statement and want to refer to the original row.
--
Mark Lawrence
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