#30246: Using an annotated field calculated with
django.db.models.functions.Extract
in aggregate results in ProgrammingError
-------------------------------------+-------------------------------------
Reporter: Jan Baryła | Owner: nobody
Type: Bug | Status: new
Component: Database layer | Version: 2.1
(models, ORM) |
Severity: Normal | Resolution:
Keywords: query, aggregate, | Triage Stage: Accepted
extract, annotate, postgresql |
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 Simon Charette):
Alright so I confirmed the bug lies in `rewrite_cols` handling of
`Lookup`; it should operate on ''clones'' of `expr` and not `expr`
directly as they cause a rewrite of previous annotations `Col`. In the
provided example here the missing `"__col2"` is actually the inner query's
`EXTRACT` reference to `friday_night_closing` that gets rewritten to
`Ref('__col2')` on the first call to `rewrite_cols`.
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Ticket URL: <https://code.djangoproject.com/ticket/30246#comment:4>
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