#35028: psycopg3: distinct query iteration causes
psycopg.errors.InvalidColumnReference: for SELECT DISTINCT, ORDER BY
expressions must appear in select list
-------------------------------------+-------------------------------------
Reporter: Richard Ebeling | Owner: Simon
| Charette
Type: Bug | Status: closed
Component: Database layer | Version: 4.2
(models, ORM) |
Severity: Normal | Resolution: fixed
Keywords: | Triage Stage: Ready for
| checkin
Has patch: 1 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Changes (by Mariusz Felisiak <felisiak.mariusz@…>):
* status: assigned => closed
* resolution: => fixed
Comment:
In [changeset:"92d6cff6a2fee7a3f9244081b84fd82c50cc71aa" 92d6cff]:
{{{
#!CommitTicketReference repository=""
revision="92d6cff6a2fee7a3f9244081b84fd82c50cc71aa"
Fixed #35028 -- Disabled server-side bindings for named cursors on psycopg
>= 3.
While we provide a `cursor_factory` based on the value of the
`server_side_bindings` option to `psycopg.Connection` it is ignored by
the `cursor` method when `name` is specified for `QuerySet.iterator()`
usage and it causes the usage of `psycopg.ServerCursor` which performs
server-side bindings.
Since the ORM doesn't generates SQL that is suitable for server-side
bindings when dealing with parametrized expressions a specialized cursor
must be used to allow server-side cursors to be used with client-side
bindings.
Thanks Richard Ebeling for the report.
Thanks Florian Apolloner and Daniele Varrazzo for reviews.
}}}
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Ticket URL: <https://code.djangoproject.com/ticket/35028#comment:10>
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