[1.6.x] Fixed #21235 -- Disabled savepoints for old versions of SQLite.
Thanks Ramiro for the report.
Backport of 91547772
from master.
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@ -367,12 +367,16 @@ class DatabaseWrapper(BaseDatabaseWrapper):
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BaseDatabaseWrapper.close(self)
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def _savepoint_allowed(self):
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# Two conditions are required here:
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# - A sufficiently recent version of SQLite to support savepoints,
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# - Being in a transaction, which can only happen inside 'atomic'.
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# When 'isolation_level' is not None, sqlite3 commits before each
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# savepoint; it's a bug. When it is None, savepoints don't make sense
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# because autocommit is enabled. The only exception is inside atomic
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# blocks. To work around that bug, on SQLite, atomic starts a
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# because autocommit is enabled. The only exception is inside 'atomic'
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# blocks. To work around that bug, on SQLite, 'atomic' starts a
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# transaction explicitly rather than simply disable autocommit.
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return self.in_atomic_block
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return self.features.uses_savepoints and self.in_atomic_block
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def _set_autocommit(self, autocommit):
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if autocommit:
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