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Fixed #26063 -- Crash when passing > 2000 params.

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If SQLITE_MAX_VARIABLE_NUMBER (default = 999) is changed at compile time
to be greater than SQLITE_MAX_COLUMN (default = 2000), which Debian does
by setting the former to 250000, Django raised an exception on queries
containing more than 2000 parameters when DEBUG = True.
This commit is contained in:
Aymeric Augustin 2016-01-09 21:30:19 +01:00
parent ee596888e1
commit f91b5a7e4b
3 changed files with 30 additions and 0 deletions
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12
tests/backends/tests.py
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@ -426,6 +426,18 @@ class LastExecutedQueryTest(TestCase):
substituted = "SELECT '\"''\\'"
self.assertEqual(connection.queries[-1]['sql'], substituted)
@unittest.skipUnless(connection.vendor == 'sqlite',
"This test is specific to SQLite.")
def test_large_number_of_parameters_on_sqlite(self):
# If SQLITE_MAX_VARIABLE_NUMBER (default = 999) has been changed to be
# greater than SQLITE_MAX_COLUMN (default = 2000), last_executed_query
# can hit the SQLITE_MAX_COLUMN limit. See #26063.
cursor = connection.cursor()
sql = "SELECT MAX(%s)" % ", ".join(["%s"] * 2001)
params = list(range(2001))
# This should not raise an exception.
cursor.db.ops.last_executed_query(cursor.cursor, sql, params)
class ParameterHandlingTest(TestCase):