diff --git a/clickhouse_sqlalchemy/drivers/compilers/sqlcompiler.py b/clickhouse_sqlalchemy/drivers/compilers/sqlcompiler.py
index 465b3331..ad4c6ec4 100644
--- a/clickhouse_sqlalchemy/drivers/compilers/sqlcompiler.py
+++ b/clickhouse_sqlalchemy/drivers/compilers/sqlcompiler.py
@@ -146,7 +146,10 @@ def visit_join(self, join, asfrom=False, **kwargs):
 
         flags = join.full
         if not isinstance(flags, dict):
-            flags = {'full': flags}
+            if isinstance(flags, str):
+                flags = {'full': flags}
+            else:
+                flags = dict(flags)
         # need to make a variable to prevent leaks in some debuggers
         join_type = flags.get('type')
         if join_type is None:
diff --git a/clickhouse_sqlalchemy/orm/query.py b/clickhouse_sqlalchemy/orm/query.py
index 3b486e2f..c4c082d4 100644
--- a/clickhouse_sqlalchemy/orm/query.py
+++ b/clickhouse_sqlalchemy/orm/query.py
@@ -110,7 +110,7 @@ def join(self, *props, **kwargs):
         x_spec = dict(spec)
         # use 'full' key to pass extra flags
         x_spec['full'] = x[-1]['full']
-        x[-1]['full'] = x_spec
+        x[-1]['full'] = tuple(x_spec.items())
 
         return rv
 
diff --git a/clickhouse_sqlalchemy/sql/schema.py b/clickhouse_sqlalchemy/sql/schema.py
index 89ddad43..fbc72886 100644
--- a/clickhouse_sqlalchemy/sql/schema.py
+++ b/clickhouse_sqlalchemy/sql/schema.py
@@ -20,12 +20,12 @@ def drop(self, bind=None, checkfirst=False, if_exists=False):
 
     def join(self, right, onclause=None, isouter=False, full=False,
              type=None, strictness=None, distribution=None):
-        flags = {
+        flags = tuple({
             'full': full,
             'type': type,
             'strictness': strictness,
             'distribution': distribution
-        }
+        }.items())
         return Join(self, right, onclause=onclause, isouter=isouter,
                     full=flags)
 
diff --git a/clickhouse_sqlalchemy/sql/selectable.py b/clickhouse_sqlalchemy/sql/selectable.py
index 35b77404..6b1ed9ae 100644
--- a/clickhouse_sqlalchemy/sql/selectable.py
+++ b/clickhouse_sqlalchemy/sql/selectable.py
@@ -63,12 +63,12 @@ def left_array_join(self, *columns):
 
     def join(self, right, onclause=None, isouter=False, full=False, type=None,
              strictness=None, distribution=None):
-        flags = {
+        flags = tuple({
             'full': full,
             'type': type,
             'strictness': strictness,
             'distribution': distribution
-        }
+        }.items())
         return Join(self, right, onclause=onclause, isouter=isouter,
                     full=flags)
 
diff --git a/tests/orm/test_select.py b/tests/orm/test_select.py
index ef21d391..675266c0 100644
--- a/tests/orm/test_select.py
+++ b/tests/orm/test_select.py
@@ -394,6 +394,29 @@ def test_multiple_joins(self):
         )
 
 
+class JoinExecuteTestCase(NativeSessionTestCase):
+    def test_execute_full_join(self):
+        numbers = Table(
+            'numbers', self.metadata(),
+            Column('number', types.UInt64, primary_key=True),
+            schema='system'
+        )
+
+        sub_query1 = self.session.query(numbers.c.number.label('x')) \
+            .limit(1) \
+            .subquery()
+
+        sub_query2 = self.session.query(numbers.c.number.label('x')) \
+            .limit(1) \
+            .subquery()
+
+        query = self.session.query(sub_query1.c.x, sub_query2.c.x) \
+            .outerjoin(sub_query2, (sub_query1.c.x == sub_query2.c.x))
+
+        self.assertEqual(query.all(), [(0, 0)])
+
+
+
 class YieldTest(NativeSessionTestCase):
     def test_yield_per_and_execution_options(self):
         numbers = Table(