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-rw-r--r--lib/sqlalchemy/dialects/mssql/information_schema.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/sqlalchemy/dialects/mssql/information_schema.py b/lib/sqlalchemy/dialects/mssql/information_schema.py
index 625479be7..a73dbdfad 100644
--- a/lib/sqlalchemy/dialects/mssql/information_schema.py
+++ b/lib/sqlalchemy/dialects/mssql/information_schema.py
@@ -38,7 +38,8 @@ class _cast_on_2005(expression.ColumnElement):
@compiles(_cast_on_2005)
def _compile(element, compiler, **kw):
from . import base
- if compiler.dialect.server_version_info < base.MS_2005_VERSION:
+ if compiler.dialect.server_version_info is None or \
+ compiler.dialect.server_version_info < base.MS_2005_VERSION:
return compiler.process(element.bindvalue, **kw)
else:
return compiler.process(cast(element.bindvalue, Unicode), **kw)