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Diffstat (limited to 'lib/sqlalchemy/sql/elements.py')
| -rw-r--r-- | lib/sqlalchemy/sql/elements.py | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/sqlalchemy/sql/elements.py b/lib/sqlalchemy/sql/elements.py index 7d857d4fe..c16c2f0ca 100644 --- a/lib/sqlalchemy/sql/elements.py +++ b/lib/sqlalchemy/sql/elements.py @@ -255,6 +255,12 @@ class ClauseElement( """ s = util.column_set() f = self + + # note this creates a cycle, asserted in test_memusage. however, + # turning this into a plain @property adds tends of thousands of method + # calls to Core / ORM performance tests, so the small overhead + # introduced by the relatively small amount of short term cycles + # produced here is preferable while f is not None: s.add(f) f = f._is_clone_of |