generateEmailHashCode UDF - Useful for identifying and blocking comment form abuse; SQL queries using INTs are faster

The generateEmailHashCode user-defined function &#x28;UDF&#x29; processes an email address by extracting the domain, sanitizing the username by removing periods &#x28;dots&#x29; and any part after the first &quot&#x3b;&#x2b;&quot&#x3b;, converting both parts to lowercase, and then returning a consistent Java-generated integer hash code of the resulting string.