Am 09.06.2019 um 00:38 schrieb Justin Pryzby:
> I see this interface has been around since PyGreSQL 3.1 (c. 2000),
> but "source objects" are not documented.
>
> I'm referring to these:
> |pg.DB('postgres').source()
> |pg.connect('postgres').source()
This is deliberate. It's an internal object that should be considered an
implementation detail of the DB-API 2 interface. We don't want to make
it an official API.
> Also, I noticed this behaves strangely:
>>>> pg.DB('postgres').source()
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> pg.OperationalError: Connection has been closed
This is probably because the db object immediately gets out of scope and
its connection gets closed, so the source object cannot work.
You need to keep the db object alive, e.g. like this:
with pg.DB('postgres') as db:
source = db.source()
source.execute("select 'source'")
print(source.fetch(1))
source.close()
query = db.query("select 'query'")
print(query.getresult())
But again, use the source() at your own risk, Luke!
-- Christoph
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