(fixes #1316) Fix for alter table rename on Snowflake tables, added t…

…ests

plugins/snowflake/dbt/include/snowflake/macros/adapters.sql

@@ -81,3 +81,10 @@
 {% macro snowflake__current_timestamp() -%}
   convert_timezone('UTC', current_timestamp())
 {%- endmacro %}
+
+
+{% macro snowflake__rename_relation(from_relation, to_relation) -%}
+  {% call statement('rename_relation') -%}
+    alter table {{ from_relation }} rename to {{ to_relation }}
+  {%- endcall %}
+{% endmacro %}

test/integration/024_custom_schema_test/models/view_3.sql

@@ -1,5 +1,5 @@
 
-{{ config(schema='test') }}
+{{ config(schema='test', materialized='table') }}
 
 
 with v1 as (

test/integration/024_custom_schema_test/test_custom_schema.py

@@ -1,5 +1,5 @@
 from nose.plugins.attrib import attr
-from test.integration.base import DBTIntegrationTest
+from test.integration.base import DBTIntegrationTest, use_profile
 
 
 class TestCustomSchema(DBTIntegrationTest):
@@ -85,6 +85,42 @@ def test__postgres__custom_schema_with_prefix(self):
         self.assertTablesEqual("agg","view_3", schema, xf_schema)
 
 
+class TestCustomProjectSchemaWithPrefixSnowflake(DBTIntegrationTest):
+
+    @property
+    def schema(self):
+        return "custom_schema_024"
+
+    @property
+    def models(self):
+        return "test/integration/024_custom_schema_test/models"
+
+    @property
+    def project_config(self):
+        return {
+            "models": {
+                "schema": "dbt_test"
+            }
+        }
+
+    @use_profile('snowflake')
+    def test__snowflake__custom_schema_with_prefix(self):
+        self.use_default_project()
+        self.run_sql_file("test/integration/024_custom_schema_test/seed.sql")
+
+        results = self.run_dbt()
+        self.assertEqual(len(results), 3)
+
+        schema = self.unique_schema().upper()
+        v1_schema = "{}_DBT_TEST".format(schema)
+        v2_schema = "{}_CUSTOM".format(schema)
+        xf_schema = "{}_TEST".format(schema)
+
+        self.assertTablesEqual("SEED","VIEW_1", schema, v1_schema)
+        self.assertTablesEqual("SEED","VIEW_2", schema, v2_schema)
+        self.assertTablesEqual("AGG","VIEW_3", schema, xf_schema)
+
+
 class TestCustomSchemaWithCustomMacro(DBTIntegrationTest):
 
     @property