#28333: Filter and subquery for window expressions
-------------------------------------+-------------------------------------
Reporter: Mads Jensen | Owner: nobody
Type: New feature | Status: new
Component: Database layer | Version: master
(models, ORM) |
Severity: Normal | Resolution:
Keywords: window orm filter | Triage Stage: Accepted
subquery |
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Changes (by Mads Jensen):
* stage: Unreviewed => Accepted
Old description:
> #26608 will introduce window function expressions, but will disallow
> filtering on the result of them, e.g.:
>
> {{{
> Window.objects.annotate(row=Window(expression=RowNumber())).filter(row__lt=1)
> }}}
>
> is not allowed. Instead, the window function expression should be wrapped
> in an inner query, and the filtering should be done in an outer query.
New description:
#26608 will introduce window function expressions, but will disallow
filtering on the result of them, e.g.:
{{{
Window.objects.annotate(row=Window(expression=RowNumber())).filter(row__gt=1)
}}}
is not allowed. Instead, the window function expression should be wrapped
in an inner query, and the filtering should be done in an outer query.
--
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Ticket URL: <https://code.djangoproject.com/ticket/28333#comment:1>
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