#36502: [DJANGO] bulk INSERT is not using UNNEST when a field is a FK on
PostgreSQL
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Reporter: canardoFR | Type:
| Uncategorized
Status: new | Component: Database
| layer (models, ORM)
Version: 5.2 | Severity: Normal
Keywords: | Triage Stage:
| Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Dear Django team,
I'm very fresh & green to Django, but we had to insert millions of lines
into a PostgreSQLtable.
We noticed that the ORM was setting up a "INSERT with UNNEST" for our
bulk_create as long as there was no ForeignKey.
Is related to code here
https://github.com/django/django/blob/main/django/db/backends/postgresql/compiler.py,
line 42 to 45
I made a quick a dirty test by monkey patching the assemble_as_sql
function to created a new list of tested fields ignoring ForeignKey type.
I would have done better by testing the ForeignKey type, but as said
above, to yound and green on django (some days).
I do not know if code is intentional or if this is a bug, thus the ticket
submission.
the patch is attached as a file...
Thanks for reading and cheers,
Alain R.
--
Ticket URL: <https://code.djangoproject.com/ticket/36502>
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