- allow the compilation rule that gets the formatted name

to again have the chance to veto rendering, as the naming convention
can make the decision that the name is "none" or not now.

1 files changed, 19 insertions, 0 deletions

diff --git a/test/sql/test_metadata.py b/test/sql/test_metadata.py
index 7aa2059dc..ee7d372d7 100644
--- a/test/sql/test_metadata.py
+++ b/test/sql/test_metadata.py
@@ -3013,6 +3013,25 @@ class NamingConventionTest(fixtures.TestBase, AssertsCompiledSQL):
             schema.CreateTable(u1).compile
         )
 
+    def test_schematype_no_ck_name_boolean_no_name(self):
+        m1 = MetaData()  # no naming convention
+
+        u1 = Table(
+            'user', m1,
+            Column('x', Boolean())
+        )
+        # constraint gets special _defer_none_name
+        eq_(
+            [c for c in u1.constraints
+                if isinstance(c, CheckConstraint)][0].name, "_unnamed_"
+        )
+
+        self.assert_compile(
+            schema.CreateTable(u1),
+            "CREATE TABLE user (x BOOLEAN, CHECK (x IN (0, 1)))"
+        )
+
+
     def test_ck_constraint_redundant_event(self):
         u1 = self._fixture(naming_convention={
                             "ck": "ck_%(table_name)s_%(constraint_name)s"})