WARNING: sql version 9.2, server version 11.0. Some psql features might not work.

This means that the server already has the database version 11.0 installed, but the path to psql is from an older version, 9.2 in this example.If you do not handle this warning, some psql features will not work when operating on the database,

For example, changing the password will not work

Solution:

First, we look at the path of psql and the result is

which psql

If the displayed path is /bin/psql, it means that the login database uses this path by default, so you need to remove the files on this path and link the new version to this path, so that the search path will automatically go to the new version.(requires root user to operate)

# mv /bin/psql /bin/psql-bk

# ln -s /usr/local/psql/bin/psql /bin/psql

Another solution is Log in directly with an absolute pathpsql /usr/local/psql/bin/psql Note hereThe path is the path of your own installation.