only introspect namespaces and views accessible

lib/Doctrine/DBAL/Platforms/PostgreSqlPlatform.php

@@ -235,7 +235,10 @@ class PostgreSqlPlatform extends AbstractPlatform
      */
     public function getListNamespacesSQL()
     {
-        return "SELECT nspname FROM pg_namespace WHERE nspname NOT LIKE 'pg_%' AND nspname != 'information_schema'";
+        return "SELECT schema_name AS nspname
+                FROM   information_schema.schemata
+                WHERE  schema_name NOT LIKE 'pg_%'
+                AND    schema_name != 'information_schema'";
     }
 
     /**
@@ -269,7 +272,11 @@ class PostgreSqlPlatform extends AbstractPlatform
      */
     public function getListViewsSQL($database)
     {
-        return 'SELECT quote_ident(viewname) as viewname, schemaname, definition FROM pg_views';
+        return 'SELECT quote_ident(table_name) AS viewname,
+                       table_schema AS schemaname,
+                       view_definition AS definition
+                FROM   information_schema.views
+                WHERE  view_definition IS NOT NULL';
     }
 
     /**