在第二个AS语句中使用第一个WITH AS语句的结果

Question

Postgres 9.5

如何以可以使用第一个WITH AS的结果的方式使用WITH语句？现在我得到了：

psql:query.sh:7: ERROR:  missing FROM-clause entry for table "foo2"
LINE 6: ...INTO copy_on_write(id, images, posted_by) VALUES (foo2.id, f...

WITH foo1 AS (SELECT listings.id, listings.images, listings.posted_by
  FROM listings WHERE listings.posted_by = 10209280753550922::text
  AND listings.id = 5),
foo2 AS (SELECT foo1.id, foo1.images, users.internal_id FROM foo1
 JOIN users ON users.id = foo1.posted_by)
INSERT INTO copy_on_write(id, images, posted_by) VALUES (foo2.id, foo2.images, foo2.internal_id)

Answer 1

您只需要INSERT . . . SELECT，而不是INSERT . . . VALUES：

WITH foo1 AS (
      SELECT l.id, l.images, l.posted_by
      FROM listings l
      WHERE l.posted_by = 10209280753550922::text AND l.id = 5
     ),
     foo2 AS (
      SELECT foo1.id, foo1.images, u.internal_id
      FROM foo1 JOIN
           users u
           ON u.id = foo1.posted_by
     )
INSERT INTO copy_on_write(id, images, posted_by)
    SELECT foo2.id, foo2.images, foo2.internal_id
    FROM foo2;