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-rw-r--r--lib/sqlalchemy/sql/type_api.py9
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/sqlalchemy/sql/type_api.py b/lib/sqlalchemy/sql/type_api.py
index 69dd80938..89c2c9de5 100644
--- a/lib/sqlalchemy/sql/type_api.py
+++ b/lib/sqlalchemy/sql/type_api.py
@@ -477,6 +477,15 @@ class TypeEngine(Visitable):
d[coltype] = rp = d['impl'].result_processor(dialect, coltype)
return rp
+ def _cached_custom_processor(self, dialect, key, fn):
+ try:
+ return dialect._type_memos[self][key]
+ except KeyError:
+ d = self._dialect_info(dialect)
+ impl = d['impl']
+ d[key] = result = fn(impl)
+ return result
+
def _dialect_info(self, dialect):
"""Return a dialect-specific registry which
caches a dialect-specific implementation, bind processing