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+'\" t
+.\"     Title: dblink_connect_u
+.\"    Author: The PostgreSQL Global Development Group
+.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
+.\"      Date: 2023
+.\"    Manual: PostgreSQL 15.5 Documentation
+.\"    Source: PostgreSQL 15.5
+.\"  Language: English
+.\"
+.TH "DBLINK_CONNECT_U" "3" "2023" "PostgreSQL 15.5" "PostgreSQL 15.5 Documentation"
+.\" -----------------------------------------------------------------
+.\" * Define some portability stuff
+.\" -----------------------------------------------------------------
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" http://bugs.debian.org/507673
+.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.ie \n(.g .ds Aq \(aq
+.el       .ds Aq '
+.\" -----------------------------------------------------------------
+.\" * set default formatting
+.\" -----------------------------------------------------------------
+.\" disable hyphenation
+.nh
+.\" disable justification (adjust text to left margin only)
+.ad l
+.\" -----------------------------------------------------------------
+.\" * MAIN CONTENT STARTS HERE *
+.\" -----------------------------------------------------------------
+.SH "NAME"
+dblink_connect_u \- opens a persistent connection to a remote database, insecurely
+.SH "SYNOPSIS"
+.sp
+.nf
+dblink_connect_u(text connstr) returns text
+dblink_connect_u(text connname, text connstr) returns text
+.fi
+.SH "DESCRIPTION"
+.PP
+\fBdblink_connect_u()\fR
+is identical to
+\fBdblink_connect()\fR, except that it will allow non\-superusers to connect using any authentication method\&.
+.PP
+If the remote server selects an authentication method that does not involve a password, then impersonation and subsequent escalation of privileges can occur, because the session will appear to have originated from the user as which the local
+PostgreSQL
+server runs\&. Also, even if the remote server does demand a password, it is possible for the password to be supplied from the server environment, such as a
+~/\&.pgpass
+file belonging to the server\*(Aqs user\&. This opens not only a risk of impersonation, but the possibility of exposing a password to an untrustworthy remote server\&. Therefore,
+\fBdblink_connect_u()\fR
+is initially installed with all privileges revoked from
+PUBLIC, making it un\-callable except by superusers\&. In some situations it may be appropriate to grant
+EXECUTE
+permission for
+\fBdblink_connect_u()\fR
+to specific users who are considered trustworthy, but this should be done with care\&. It is also recommended that any
+~/\&.pgpass
+file belonging to the server\*(Aqs user
+\fInot\fR
+contain any records specifying a wildcard host name\&.
+.PP
+For further details see
+\fBdblink_connect()\fR\&.