postgresql – 带PERFORM CTE查询的Postgres plpgsql

perform * from test;

但是,如果我尝试将该简单查询重写为CTE,我无法使其正常工作.我收到语法错误.

with test_as_cte as(select * from test) perform * from test_as_cte;

这可能吗？什么是正确的语法？我尝试了几种替代方案并通过文档,但到目前为止没有任何成功.

(请注意,这只是解释我的问题的一个例子.我知道查询没有任何意义.)

create table test
(
    key int primary key  
);

create function test() returns trigger as
$$
begin
    raise notice 'hello there';
    -- this does work
    perform * from test;
    -- this doesn't work
    with test_as_cte as(select * from test) perform * from test_as_cte;
    return new;
end;
$$
language plpgsql;

create trigger test after insert on test for each row execute procedure test();

insert into test(key) select 1;