Refs #21160 -- Replaced DatabaseFeatures.supports_1000_query_parameters by a DatabaseFeatures.max_query_params.

This commit is contained in:
Mariusz Felisiak 2017-03-24 18:37:03 +01:00 committed by GitHub
parent 1b1ea63f6a
commit f42c7cc87b
4 changed files with 16 additions and 27 deletions

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@ -90,8 +90,8 @@ class BaseDatabaseFeatures:
# Does the backend order NULL values as largest or smallest?
nulls_order_largest = False
# Is there a 1000 item limit on query parameters?
supports_1000_query_parameters = True
# The database's limit on the number of query parameters.
max_query_params = None
# Can an object have an autoincrement primary key of 0? MySQL says No.
allows_auto_pk_0 = True

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@ -14,7 +14,7 @@ class DatabaseFeatures(BaseDatabaseFeatures):
test_db_allows_multiple_connections = False
supports_unspecified_pk = True
supports_timezones = False
supports_1000_query_parameters = False
max_query_params = 999
supports_mixed_date_datetime_comparisons = False
has_bulk_insert = True
supports_foreign_keys = False

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@ -21,8 +21,12 @@ class DatabaseOperations(BaseDatabaseOperations):
If there's only a single field to insert, the limit is 500
(SQLITE_MAX_COMPOUND_SELECT).
"""
limit = 999 if len(fields) > 1 else 500
return (limit // len(fields)) if len(fields) > 0 else len(objs)
if len(fields) == 1:
return 500
elif len(fields) > 1:
return self.connection.features.max_query_params // len(fields)
else:
return len(objs)
def check_expression_support(self, expression):
bad_fields = (fields.DateField, fields.DateTimeField, fields.TimeField)

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@ -2523,32 +2523,17 @@ class ConditionalTests(TestCase):
self.assertEqual(sql.find(fragment, pos + 1), -1)
self.assertEqual(sql.find("NULL", pos + len(fragment)), pos + len(fragment))
# Sqlite 3 does not support passing in more than 1000 parameters except by
# changing a parameter at compilation time.
@skipUnlessDBFeature('supports_1000_query_parameters')
def test_ticket14244(self):
def test_in_list_limit(self):
# The "in" lookup works with lists of 1000 items or more.
# The numbers amount is picked to force three different IN batches
# for Oracle, yet to be less than 2100 parameter limit for MSSQL.
numbers = list(range(2050))
Number.objects.all().delete()
Number.objects.bulk_create(Number(num=num) for num in numbers)
self.assertEqual(
Number.objects.filter(num__in=numbers[:1000]).count(),
1000
)
self.assertEqual(
Number.objects.filter(num__in=numbers[:1001]).count(),
1001
)
self.assertEqual(
Number.objects.filter(num__in=numbers[:2000]).count(),
2000
)
self.assertEqual(
Number.objects.filter(num__in=numbers).count(),
len(numbers)
)
max_query_params = connection.features.max_query_params
if max_query_params is None or max_query_params >= len(numbers):
Number.objects.bulk_create(Number(num=num) for num in numbers)
for number in [1000, 1001, 2000, len(numbers)]:
with self.subTest(number=number):
self.assertEqual(Number.objects.filter(num__in=numbers[:number]).count(), number)
class UnionTests(unittest.TestCase):