Why is my PostgreSQL package not working?
<p>I am in a database course and am reading through the book doing the exercises as I go. I have installed PostgreSQL on my computer and created a database book. </p>

<p>I ran the following code to see if the packages have installed correctly like the book prompted me to do and received the following error...</p>

<pre><code>Korys-MacBook-Pro:~ KoryHershock$ psql book -c "SELECT '1'::cube;"
ERROR:  type "cube" does not exist
LINE 1: SELECT '1'::cube;
</code></pre>

<p>The books says to see online docs if you receive an error message. I have been looking and have had no luck thus far. I wasn't to move on in the book because I really enjoy this class so far. Any suggestions?</p>