Sophie: postgresql-docs-7.4.1-2.5.100mdk i586

postgresql-docs-7.4.1-2.5.100mdk.i586.rpm

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><A
NAME="USER-ATTRIBUTES"
>17.2. User Attributes</A
></H1
><P
>    A database user may have a number of attributes that define its
    privileges and interact with the client authentication system.

    <P
></P
></P><DIV
CLASS="VARIABLELIST"
><DL
><DT
>superuser<A
NAME="AEN17247"
></A
></DT
><DD
><P
>        A database superuser bypasses all permission checks. Also,
        only a superuser can create new users. To create a database
        superuser, use <TT
CLASS="LITERAL"
>CREATE USER <VAR
CLASS="REPLACEABLE"
>name</VAR
>
        CREATEUSER</TT
>.
       </P
></DD
><DT
>database creation<A
NAME="AEN17255"
></A
></DT
><DD
><P
>        A user must be explicitly given permission to create databases
        (except for superusers, since those bypass all permission
        checks). To create such a user, use <TT
CLASS="LITERAL"
>CREATE USER
        <VAR
CLASS="REPLACEABLE"
>name</VAR
> CREATEDB</TT
>.
       </P
></DD
><DT
>password<A
NAME="AEN17264"
></A
></DT
><DD
><P
>        A password is only significant if the client authentication
        method requires the user to supply a password when connecting
        to the database. The <VAR
CLASS="OPTION"
>password</VAR
>,
        <VAR
CLASS="OPTION"
>md5</VAR
>, and <VAR
CLASS="OPTION"
>crypt</VAR
> authentication methods
        make use of passwords. Database passwords are separate from
        operating system passwords. Specify a password upon user
        creation with <TT
CLASS="LITERAL"
>CREATE USER
        <VAR
CLASS="REPLACEABLE"
>name</VAR
> PASSWORD '<VAR
CLASS="REPLACEABLE"
>string</VAR
>'</TT
>. 
       </P
></DD
></DL
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><P>

    A user's attributes can be modified after creation with
    <TT
CLASS="COMMAND"
>ALTER USER</TT
>.<A
NAME="AEN17275"
></A
>
    See the reference pages for <TT
CLASS="COMMAND"
>CREATE USER</TT
> and
    <TT
CLASS="COMMAND"
>ALTER USER</TT
> for details.
   </P
><P
>   A user can also set personal defaults for many of the run-time
   configuration settings described in <A
HREF="runtime-config.html"
>Section 16.4</A
>.  For example, if for some reason you
   want to disable index scans (hint: not a good idea) anytime you
   connect, you can use
</P><PRE
CLASS="PROGRAMLISTING"
>ALTER USER myname SET enable_indexscan TO off;</PRE
><P>
   This will save the setting (but not set it immediately) and in
   subsequent connections it will appear as though <TT
CLASS="LITERAL"
>SET enable_indexscan
   TO off;</TT
> had been called right before the session started.
   You can still alter this setting during the session; it will only
   be the default. To undo any such setting, use <TT
CLASS="LITERAL"
>ALTER USER
   <VAR
CLASS="REPLACEABLE"
>username</VAR
> RESET <VAR
CLASS="REPLACEABLE"
>varname</VAR
>;</TT
>.
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