A
></DT
><DT
>19.4. <A
HREF="client-authentication-problems.html"
>Authentication Problems</A
></DT
></DL
></DD
><DT
>20. <A
HREF="user-manag.html"
>Database Roles</A
></DT
><DD
><DL
><DT
>20.1. <A
HREF="database-roles.html"
>Database Roles</A
></DT
><DT
>20.2. <A
HREF="role-attributes.html"
>Role Attributes</A
></DT
><DT
>20.3. <A
HREF="role-membership.html"
>Role Membership</A
></DT
><DT
>20.4. <A
HREF="perm-functions.html"
>Function and Trigger Security</A
></DT
></DL
></DD
><DT
>21. <A
HREF="managing-da