在 postgresql 查询中多次使用单个 WITH

Question

如何多次使用第一个 with 语句？使用如下代码，除了紧随其后的语句之外，我不能将它用于任何其他语句。

WITH insertuser AS (

    INSERT INTO 
    zorro.user (username, firstname, lastname,
        accountstatus, roles, creationdatetime)
    VALUES('test', 'test', 'test',
        'test', 'test', current_timestamp)
    RETURNING id
    )

INSERT INTO
zorro.email (address, confirmed, count, user_id)
SELECT 'test', false, 1, id
FROM insertuser;

INSERT INTO
zorro.password (hash, count, user_id)
SELECT 'test', 1, id
FROM insertuser;

INSERT INTO
zorro.phone_number (number, confirmed, count, user_id)
SELECT 'test', false, 1, id
FROM insertuser;

INSERT INTO
zorro.Question (text, answer, count, user_id)
SELECT 'test', 'test', 1, id
FROM insertuser;

我在代码中的第二个 "FROM insertuser" 附近的第 19 行收到 sql 错误。

Answer 1

我想你可以使用一系列常见的table表达式：

WITH insertuser AS (
    INSERT INTO zorro.user (username, firstname, lastname, accountstatus, roles, creationdatetime)
        VALUES('test', 'test', 'test', 'test', 'test', current_timestamp)
     RETURNING id
    ),
    em as (
     INSERT INTO zorro.email (address, confirmed, count, user_id)
         SELECT 'test', false, 1, id
         FROM insertuser
     RETURNING *
    ),
    p as (
     INSERT INTO zorro.password (hash, count, user_id)
         SELECT 'test', 1, id
         FROM insertuser
     RETURNING *
    ),
    pn as (
     INSERT INTO zorro.phone_number (number, confirmed, count, user_id)
         SELECT 'test', false, 1, id
         FROM insertuser
     RETURNING *
   )
INSERT INTO zorro.Question (text, answer, count, user_id)
    SELECT 'test', 'test', 1, id
    FROM insertuser;

我不是 100% 确定 CTE 是否需要 RETURNING 子句。

在 postgresql 查询中多次使用单个 WITH

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