Question

我是PostgreSQL的新用户，我在array中使用PostgreSQL类型

WITH intarr AS (
    SELECT
        ARRAY [ s.days,s.hours ] ::int[] AS arr
    FROM summary s
    WHERE s.hours != 2
)
SELECT ARRAY(SELECT * from intarr );

我收到此错误：

[Err]错误：找不到数据类型integer []
的数组类型

我找到了改变方式

ARRAY [ s.days,s.hours ] ::int[] AS arr

到此

行

ARRAY [ s.days,s.hours ] ::varchar AS arr

我得到的结果如下：{"{1,3}","{2,3}"}。但我需要结果int[][]类型。我如何将one-dimensional array转换为two-dimensional array

Answer 1

我现在用它，我不认为它是完美的方式。

WITH intarr AS (
    SELECT
        ARRAY [ s.days,s.hours ] ::VARCHAR AS arr
    FROM
        summary s
    WHERE
        s.hours != 2
)
SELECT replace((SELECT ARRAY(SELECT arr from intarr)::VARCHAR), '"', '')::int[][]

PostgreSQL将数组转换为二维

1 个答案: