使用临时表来优化视图和UDF的性能。 将视图中使用的UDF的结果存储在临时表中，然后在查询视图时直接引用该临时表，以避免重复计算UDF的结果。

代码示例：

创建一个UDF：

CREATE FUNCTION get_customer_name(customer_id int) RETURNS text AS $$ SELECT name FROM customers WHERE id = customer_id; $$ LANGUAGE SQL;

创建一个视图：

CREATE VIEW orders_view AS SELECT order_id, order_date, get_customer_name(customer_id) as customer_name FROM orders;

使用临时表来优化视图和UDF的性能：

CREATE TEMP TABLE temp_orders AS SELECT order_id, order_date, customer_id, get_customer_name(customer_id) as customer_name FROM orders;

CREATE VIEW orders_view AS SELECT order_id, order_date, customer_name FROM temp_orders;