UUID_GENERATE

返回新的通用唯一标识符 (UUID)，该标识符基于 /dev/urandom 的高质量随机功能生成。

行为类型

易变

语法

UUID_GENERATE()

示例

=> CREATE TABLE Customers(
     cust_id UUID DEFAULT UUID_GENERATE(),
   lname VARCHAR(36),
   fname VARCHAR(24));
CREATE TABLE
=> INSERT INTO Customers VALUES (DEFAULT, 'Kearney', 'Thomas');
 OUTPUT
--------
      1
(1 row)

=> COPY Customers (lname, fname) FROM STDIN;
Enter data to be copied followed by a newline.
End with a backslash and a period on a line by itself.
>> Pham|Duc
>> Garcia|Mary
>> \.
=> SELECT * FROM Customers;
               cust_id                |  lname  | fname
--------------------------------------+---------+--------
 03fe0794-ac5d-42d4-8246-54f7ec81ed0c | Pham    | Duc
 6950313d-c77e-4c11-a86e-0a54aa3ec114 | Kearney | Thomas
 9c9653ce-c2e4-4441-b0f7-0137b54cc28c | Garcia  | Mary
(3 rows)