Enable tests for enums and schemas

These features are supported in v20.2+

Author: rafiss

cockroachdb/sqlalchemy/dialect.py

@@ -117,7 +117,6 @@ def initialize(self, connection):
         # often.
         super(PGDialect, self).initialize(connection)
         self.implicit_returning = True
-        self.supports_native_enum = False
         self.supports_smallserial = False
         self._backslash_escapes = False
         sversion = connection.scalar("select version()")
@@ -130,6 +129,7 @@ def initialize(self, connection):
         self._has_native_json = self._is_v2plus
         self._has_native_jsonb = self._is_v2plus
         self._supports_savepoints = self._is_v201plus
+        self.supports_native_enum = self._is_v202plus
 
     def _get_server_version_info(self, conn):
         # PGDialect expects a postgres server version number here,

cockroachdb/sqlalchemy/test_requirements.py

@@ -53,7 +53,8 @@ class Requirements(SuiteRequirements):
     emulated_lastrowid = exclusions.open()
     dbapi_lastrowid = exclusions.open()
     views = exclusions.open()
-    schemas = exclusions.closed()
+    schemas = exclusions.skip_if(lambda config: not config.db.dialect._is_v202plus,
+                                 "versions before 20.2 do not suport schemas")
     sequences = exclusions.closed()
     sequences_optional = exclusions.closed()
     temporary_views = exclusions.closed()