#28333: Filter and subquery for window expressions
-------------------------------------+-------------------------------------
Reporter: Mads Jensen | Owner: (none)
Type: New feature | Status: new
Component: Database layer | Version: dev
(models, ORM) |
Severity: Normal | Resolution:
Keywords: window orm filter | Triage Stage: Accepted
subquery GSoC |
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by SafaAlfulaij):
What I'm doing currently is this hack:
Before:
{{{
#!python
queryset =
MyModel.objects.annotate(row=Window(expression=RowNumber())).filter(row__gt=1)
}}}
After:
{{{
#!python
queryset = MyModel.objects.annotate(row=Window(expression=RowNumber()))
sql, params = queryset.query.sql_with_params()
queryset = queryset.raw(f"SELECT * FROM ({sql}) AS full WHERE row >= 1",
params)
}}}
I don't see that it's bad to have this currently, with whatever
limitations of `raw` documented in the `Window` filtering section, then
add in more features if real use cases are provided.
--
Ticket URL: <https://code.djangoproject.com/ticket/28333#comment:20>
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