Fixed #36490 -- Avoided unnecessary transaction in bulk_create. #19614
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shangxiao
approved these changes
Jul 2, 2025
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When dealing with an heterogeneous set of object with regards to primary key assignment that fits in a single batch there's no need to wrap the single INSERT statement in a transaction.
…andling. Whether or not returning_fields should be specified to _insert is not a function of each batches so the conditional can be moved outside of the loop.
Asserting an upper bound for the number of executed queries can be achieved by using CaptureQueriesContext instead of enabling the whole DEBUG machinery.
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FWIW recent improvements in |
charettes
commented
Jul 2, 2025
| self._for_write = True | ||
| fields = [f for f in opts.concrete_fields if not f.generated] | ||
| objs = list(objs) | ||
| objs_with_pk, objs_without_pk = self._prepare_for_bulk_create(objs) |
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It appears that this whole primary key assignment partition logic can also be elided if we'd like to go further
sarahboyce
approved these changes
Aug 14, 2025
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Trac ticket number
ticket-36490
Branch description
When bulk_create deals with an heterogeneous set of object with regards to primary key assignment that fits in a single batch there's no need to wrap the resulting single INSERT statement in a transaction.
Checklist
mainbranch.