#32300: "BIGINT UNSIGNED value is out of range" occurs when substraction
operation
between PositiveBigIntegerField and BigIntegerField using F()
-------------------------------------+-------------------------------------
Reporter: jun | Owner: nobody
Type: Bug | Status: new
Component: Database | Version: 3.1
layer (models, ORM) |
Severity: Normal | Keywords: F expression
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
-------------------------------------+-------------------------------------
* Environment
{{{
MacOS 0.15.3
Django 3.1
MySQL 5.7.32
mysqlclient==2.0.1
}}}
* Model
{{{
class SomeModel(models.Model):
positive_big_int_column = models.PositiveBigIntegerField(default=0)
big_int_column = models.BigIntegerField(default=0)
}}}
* Test
{{{
SomeModel.objects.create(positive_big_int_column=100, big_int_column=300)
qs = SomeModel.objects.filter(positive_big_int_column=100)
qs.update(big_int_column=F('positive_big_int_column') -
F('big_int_column'))
}}}
* Expected query
UPDATE SomeModel SET big_int_column=(100-300)
* Error
IntegrityError: (1690, "BIGINT UNSIGNED value is out of range in blabla")
--
Ticket URL: <https://code.djangoproject.com/ticket/32300>
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