#29725: Inefficient SQL generated when counting a ManyToMany -------------------------------------+------------------------------------- Reporter: Gavin Wahl | Owner: ontowhee Type: | Status: assigned Cleanup/optimization | Component: Database layer | Version: dev (models, ORM) | Severity: Normal | Resolution: Keywords: | Triage Stage: Accepted Has patch: 1 | Needs documentation: 0 Needs tests: 1 | Patch needs improvement: 1 Easy pickings: 0 | UI/UX: 0 -------------------------------------+------------------------------------- Comment (by ontowhee):
I'm not sure if this is a viable solution. It passing the `ManyRelatedManager` to the queryset as an instance variable `_many_related_queryset`. [https://github.com/django/django/pull/17811 Draft PR] > No need to as at that point it will be a QuerySet I briefly looked into `QuerySet._query` to see if a new optimized sql query could be generated when the `aliasMap` lists certain table types. I ended up passing the `ManyRelatedManager` to get something working. I'm open to exploring a different approach. -- Ticket URL: <https://code.djangoproject.com/ticket/29725#comment:26> Django <https://code.djangoproject.com/> The Web framework for perfectionists with deadlines. -- You received this message because you are subscribed to the Google Groups "Django updates" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-updates+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/django-updates/0107018d6de84e6f-405949fe-0855-413c-ac7d-7bd7650ae12f-000000%40eu-central-1.amazonses.com.