title: How does the built-in Apache Hive hash function work and where can I find that documentation?
body: <p>I'm working with Apache Hive and need to be certain of how the built-in hash function works. I found <a href="https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF#LanguageManualUDF-Built-inFunctions" rel="nofollow noreferrer">this</a> page that lists <code>hash</code> under the <strong>Misc. Functions</strong> section. It says that <code>hash</code> has been available "As of Hive 0.4".</p>
  
  <p>I would just like to see some documentation on what it's doing exactly. Is it deterministic? Will it always produce the same output given the same input? How many collisions should I expect? </p>