[highgo@yueqi ~]$  psql -p 5866 -U u_lei  -d db_lei
psql (4.1.1)
PSQL: Release 4.1.1
Connected to:
HighGo Database V4.1 Enterprise Edition Release 4.1.1 - 64-bit Production
Type "help" for help.
db_lei=> create schema s_lei;
错误:  42501: 对数据库 db_lei 权限不够
db_lei=> exit
db_lei-> \q
[highgo@yueqi ~]$  psql 
psql (4.1.1)
PSQL: Release 4.1.1
Connected to:
HighGo Database V4.1 Enterprise Edition Release 4.1.1 - 64-bit Production
Type "help" for help.
highgo=# \c
PSQL: Release 4.1.1
Connected to:
HighGo Database V4.1 Enterprise Edition Release 4.1.1 - 64-bit Production
You are now connected to database "highgo" as user "highgo".
highgo=# \l
                               List of databases
     Name     | Owner  | Encoding |  Collate   |   Ctype    | Access privileges 
--------------+--------+----------+------------+------------+-------------------
 benchmarksql | highgo | UTF8     | zh_CN.utf8 | zh_CN.utf8 | 
 db_lei       | highgo | UTF8     | zh_CN.utf8 | zh_CN.utf8 | =Tc/highgo       +
              |        |          |            |            | highgo=CTc/highgo+
              |        |          |            |            | u_lei=c/highgo
 db_zhang     | highgo | UTF8     | zh_CN.utf8 | zh_CN.utf8 | =Tc/highgo       +
              |        |          |            |            | highgo=CTc/highgo+
              |        |          |            |            | u_zhang=c/highgo
 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
(6 rows)
highgo=# grant create on database db_lei to u_lei;
GRANT
highgo=# 
结论:1.schema是每个database中都有的。
           2.user是pg cluster级别的。