limit tables/views returned if schema is not provided

superset/models/core.py

@@ -748,6 +748,10 @@ def table_cache_enabled(self):
     def table_cache_timeout(self):
         return self.metadata_cache_timeout.get('table_cache_timeout')
 
+    @property
+    def default_schemas(self):
+        return self.get_extra().get('default_schemas', [])
+
     @classmethod
     def get_password_masked_url_from_uri(cls, uri):
         url = make_url(uri)

superset/views/core.py

@@ -1513,6 +1513,25 @@ def tables(self, db_id, schema, substr, force_refresh='false'):
             table_names = [tn for tn in table_names if substr in tn]
             view_names = [vn for vn in view_names if substr in vn]
 
+        if not schema and database.default_schemas:
+            def is_default_tbl_or_view(tbl_or_view_name, schemas):
+                if tbl_or_view_name.startswith('{}.'.format(g.user.username)):
+                    return True
+
+                for schema in schemas:
+                    if tbl_or_view_name.startswith('{}.'.format(schema)):
+                        return True
+                return False
+
+            table_names = [
+                tn for tn in table_names
+                if is_default_tbl_or_view(tn, database.default_schemas)
+            ]
+            view_names = [
+                vn for vn in view_names
+                if is_default_tbl_or_view(vn, database.default_schemas)
+            ]
+
         max_items = config.get('MAX_TABLE_NAMES') or len(table_names)
         total_items = len(table_names) + len(view_names)
         max_tables = len(table_names)