Daniele Varrazzo <daniele.varrazzo@gmail.com> writes:
> A problem shown in https://github.com/psycopg/psycopg/discussions/289
> In the query:
> UPDATE test289 SET num = $1, name = $2, ts = $3 WHERE ts::date = $3::date
> passing a string with unknown oid as param $3 results in the column ts
> receiving only the date part. Looks like the cast needed on the param
> in the WHERE gets propagated to the other occurrences of the same
> parameter.
I think it's operating exactly as designed. The parameter can only
have one type, and the cast is telling it to assume that that type
is "date".
> I see why it happens... I don't think it's the right behaviour though.
What do you think ought to happen? The same parameter somehow having
different types in different places?
regards, tom lane
