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-$PostgreSQL: pgsql/contrib/dblink/doc/connection,v 1.5 2007/07/08 17:12:38 joe Exp $
-==================================================================
-Name
-
-dblink_connect -- Opens a persistent connection to a remote database
-
-Synopsis
-
-dblink_connect(text connstr)
-dblink_connect(text connname, text connstr)
-
-Inputs
-
-  connname
-    if 2 arguments are given, the first is used as a name for a persistent
-    connection
-
-  connstr
-
-    standard libpq format connection string, 
-    e.g. "hostaddr=127.0.0.1 port=5432 dbname=mydb user=postgres password=mypasswd"
-
-    if only one argument is given, the connection is unnamed; only one unnamed
-    connection can exist at a time
-
-Outputs
-
-  Returns status = "OK"
-
-Notes
-
-  Only superusers may use dblink_connect to create non-password
-  authenticated connections. If non-superusers need this capability,
-  use dblink_connect_u instead.
-
-Example usage
-
-select dblink_connect('dbname=postgres');
- dblink_connect
-----------------
- OK
-(1 row)
-
-select dblink_connect('myconn','dbname=postgres');
- dblink_connect
-----------------
- OK
-(1 row)
-
-==================================================================
-Name
-
-dblink_connect_u -- Opens a persistent connection to a remote database
-
-Synopsis
-
-dblink_connect_u(text connstr)
-dblink_connect_u(text connname, text connstr)
-
-Inputs
-
-  connname
-    if 2 arguments are given, the first is used as a name for a persistent
-    connection
-
-  connstr
-
-    standard libpq format connection string, 
-    e.g. "hostaddr=127.0.0.1 port=5432 dbname=mydb user=postgres password=mypasswd"
-
-    if only one argument is given, the connection is unnamed; only one unnamed
-    connection can exist at a time
-
-Outputs
-
-  Returns status = "OK"
-
-Notes
-
-  With dblink_connect_u, a non-superuser may connect to any database server
-  using any authentication method. If the authentication method specified
-  for a particular user does not require a password, impersonation and
-  therefore escalation of privileges may occur. For this reason,
-  dblink_connect_u is initially installed with all privileges revoked from
-  public. Privilege to these functions should be granted with care.
-
-Example usage
-
-
-==================================================================
-Name
-
-dblink_disconnect -- Closes a persistent connection to a remote database
-
-Synopsis
-
-dblink_disconnect()
-dblink_disconnect(text connname)
-
-Inputs
-
-  connname
-    if an argument is given, it is used as a name for a persistent
-    connection to close; otherwiase the unnamed connection is closed
-
-Outputs
-
-  Returns status = "OK"
-
-Example usage
-
-test=# select dblink_disconnect();
- dblink_disconnect
--------------------
- OK
-(1 row)
-
-select dblink_disconnect('myconn');
- dblink_disconnect
--------------------
- OK
-(1 row)