postgres更改数据库名的条件

1、必须是数据库的属主才可以修改
2、数据库必须断开所有连接

highgo=> \c highgo test
You are now connected to database "highgo" as user "test".
highgo=> alter database test rename to testa;
错误:  必须是数据库 test 的属主
highgo=> 
highgo=> 
highgo=> \c highgo highgo
You are now connected to database "highgo" as user "highgo".
highgo=# alter database test rename to testa;
错误:  其他用户正在使用数据库 "test"
DETAIL:  那里有1个其它会话正在使用数据库.
highgo=# alter database test rename to testa;
ALTER DATABASE
highgo=# \l
                              List of databases
   Name    | Owner  | Encoding |  Collate   |   Ctype    | Access privileges 
-----------+--------+----------+------------+------------+-------------------
 a         | highgo | UTF8     | zh_CN.utf8 | zh_CN.utf8 | 
 b         | highgo | UTF8     | zh_CN.utf8 | zh_CN.utf8 | 
 c         | highgo | UTF8     | zh_CN.utf8 | zh_CN.utf8 | 
 highgo    | highgo | UTF8     | zh_CN.utf8 | zh_CN.utf8 | 
 template0 | highgo | UTF8     | zh_CN.utf8 | zh_CN.utf8 | =c/highgo        +
           |        |          |            |            | highgo=CTc/highgo
 template1 | highgo | UTF8     | zh_CN.utf8 | zh_CN.utf8 | =c/highgo        +
           |        |          |            |            | highgo=CTc/highgo
 testa     | highgo | UTF8     | zh_CN.utf8 | zh_CN.utf8 | 
(7 rows)


highgo=# alter database testa rename to test;
ALTER DATABASE
highgo=# \l
                              List of databases
   Name    | Owner  | Encoding |  Collate   |   Ctype    | Access privileges 
-----------+--------+----------+------------+------------+-------------------
 a         | highgo | UTF8     | zh_CN.utf8 | zh_CN.utf8 | 
 b         | highgo | UTF8     | zh_CN.utf8 | zh_CN.utf8 | 
 c         | highgo | UTF8     | zh_CN.utf8 | zh_CN.utf8 | 
 highgo    | highgo | UTF8     | zh_CN.utf8 | zh_CN.utf8 | 
 template0 | highgo | UTF8     | zh_CN.utf8 | zh_CN.utf8 | =c/highgo        +
           |        |          |            |            | highgo=CTc/highgo
 template1 | highgo | UTF8     | zh_CN.utf8 | zh_CN.utf8 | =c/highgo        +
           |        |          |            |            | highgo=CTc/highgo
 test      | highgo | UTF8     | zh_CN.utf8 | zh_CN.utf8 | 
(7 rows)