Create a user (role) or role(group) in Greenplum

Note:
1. Using create user or create role psql command

sachi=# \h create user
Command:     CREATE USER
Description: define a new database role
Syntax:
CREATE USER name [ [ WITH ] option [ ... ] ]

where option can be:
    
      SUPERUSER | NOSUPERUSER
    | CREATEDB | NOCREATEDB
    | CREATEROLE | NOCREATEROLE
    | CREATEUSER | NOCREATEUSER
    | INHERIT | NOINHERIT
    | LOGIN | NOLOGIN
    | CONNECTION LIMIT connlimit
    | [ ENCRYPTED | UNENCRYPTED ] PASSWORD 'password'
    | VALID UNTIL 'timestamp' 
    | IN ROLE rolename [, ...]
    | IN GROUP rolename [, ...]
    | ROLE rolename [, ...]
    | ADMIN rolename [, ...]
    | USER rolename [, ...]
    | SYSID uid 
    | RESOURCE QUEUE queuename

sachi=# \h create role
Command:     CREATE ROLE
Description: define a new database role
Syntax:
CREATE ROLE name [[WITH] option [ ... ]]
where option can be:
      SUPERUSER | NOSUPERUSER
    | CREATEDB | NOCREATEDB
    | CREATEROLE | NOCREATEROLE
    | CREATEEXTTABLE | NOCREATEEXTTABLE 
      [ ( attribute='value'[, ...] ) ]
           where attributes and values are:
           type='readable'|'writable'
           protocol='gpfdist'|'http'|'gphdfs'
    | INHERIT | NOINHERIT
    | LOGIN | NOLOGIN
    | CONNECTION LIMIT connlimit
    | [ ENCRYPTED | UNENCRYPTED ] PASSWORD 'password'
    | VALID UNTIL 'timestamp' 
    | IN ROLE rolename [, ...]
    | ROLE rolename [, ...]
    | ADMIN rolename [, ...]
    | RESOURCE QUEUE queue_name

sachi=# 
2. Createuser OS command/utilities

[gpadmin@localhost ~]$ createuser --help
createuser creates a new PostgreSQL role.


Usage:
createuser [OPTION]... [ROLENAME]


Options:
-c, --connection-limit=N connection limit for role (default: no limit)
-d, --createdb role can create new databases
-D, --no-createdb role cannot create databases
-e, --echo show the commands being sent to the server
-E, --encrypted encrypt stored password
-i, --inherit role inherits privileges of roles it is a
member of (default)
-I, --no-inherit role does not inherit privileges
-l, --login role can login (default)
-L, --no-login role cannot login
-N, --unencrypted do not encrypt stored password
-P, --pwprompt assign a password to new role
-r, --createrole role can create new roles
-R, --no-createrole role cannot create roles
-s, --superuser role will be superuser
-S, --no-superuser role will not be superuser
--help show this help, then exit
--version output version information, then exit


Connection options:
-h, --host=HOSTNAME database server host or socket directory
-p, --port=PORT database server port
-U, --username=USERNAME user name to connect as (not the one to create)
-w, --no-password never prompt for password
-W, --password force password prompt


If one of -d, -D, -r, -R, -s, -S, and ROLENAME is not specified, you will
be prompted interactively.


Report bugs to <pgsql-bugs@postgresql.org>.







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