#29214: Invalid SQL generated when annotating a subquery with an outerref to an
annotated field.
-------------------------------------+-------------------------------------
Reporter: Oskar Persson | Owner: nobody
Type: Bug | Status: new
Component: Database layer | Version: master
(models, ORM) |
Severity: Normal | Resolution:
Keywords: queryset | Triage Stage: Accepted
annotations |
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Changes (by Chetan Khanna):
* cc: Chetan Khanna (added)
Comment:
Yes. On running the same query, I get the following SQL and traceback:
{{{
latest_parent =
Recursive.objects.filter(link=OuterRef('parent_link')).order_by('id')
Recursive.objects.filter(parent__isnull=False) \
.annotate(parent_link=F('parent__link')) \
.annotate(p=Subquery(latest_parent.values('pk')[:1])) \
.update(parent_id=F('p'))
}}}
SQL:
{{{
UPDATE "recursive_model"
SET "parent_id" = (
SELECT U0."id"
FROM "recursive_model" U0
WHERE U0."link" = T2."link"
ORDER BY U0."id" ASC
LIMIT 1
)
WHERE "recursive_model"."id" IN (
SELECT V0."id"
FROM "recursive_model" V0
INNER JOIN "recursive_model" V1
ON (V0."parent_id" = V1."id")
WHERE V0."parent_id" IS NOT NULL
)
}}}
Traceback:
{{{
ProgrammingError: missing FROM-clause entry for table "t2"
LINE 1: ...."id" FROM "recursive_model" U0 WHERE U0."link" = T2."link" ...
}}}
Unfortunately I haven't looked deeper, but I am planning to during this
weekend. I'll report if I get something else.
--
Ticket URL: <https://code.djangoproject.com/ticket/29214#comment:11>
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