postgresql-client
=================

psql is the standard interactive tool for managing the database.

psql needs to be matched to the server to which it is talking.  This is
especially important with the change to PostgreSQL version 7.3, which
introduced schemas.  This required changes in the SQL commands that
implement psql's shorthand commands (such as \l to list databases).  These
changes mean that those commands are not understood by server versions
earlier than 7.3.

The upshot is that it is highly desirable to update all machines at the
same time to the new postgresql packages, since differing server versions
may make it difficult for them to work together.