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[2.0.x] Fixed #28596 -- Fixed QuerySet.bulk_create() and cascade deletion crash on Oracle when using more than 65535 parameters.

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Thanks Tim Graham for the review.
Backport of 1b823b8f18 from master
This commit is contained in:
Mariusz Felisiak
2017-10-05 18:52:37 +02:00
parent cfde4ac3e7
commit 20d6785426
3 changed files with 21 additions and 0 deletions
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14
tests/backends/oracle/test_operations.py
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@@ -9,3 +9,17 @@ class OperationsTests(unittest.TestCase):
def test_sequence_name_truncation(self):
seq_name = connection.ops._get_no_autofield_sequence_name('schema_authorwithevenlongee869')
self.assertEqual(seq_name, 'SCHEMA_AUTHORWITHEVENLOB0B8_SQ')
def test_bulk_batch_size(self):
# Oracle restricts the number of parameters in a query.
objects = range(2**16)
self.assertEqual(connection.ops.bulk_batch_size([], objects), len(objects))
# Each field is a parameter for each object.
self.assertEqual(
connection.ops.bulk_batch_size(['id'], objects),
connection.features.max_query_params,
)
self.assertEqual(
connection.ops.bulk_batch_size(['id', 'other'], objects),
connection.features.max_query_params // 2,
)