public function schemaTemplate($schemaName)
    {
        return [
            'exists' => (new Query())
                ->select('nspname')
                ->from('pg_namespace')
                ->where('nspname = :value', [':value' => $schemaName])
                ->exists($this->db),
            'up' => "CREATE SCHEMA $schemaName",
            'down' => "DROP SCHEMA $schemaName",
        ];
    }