I need to write hive query that will pull from a table including columns for lat lon and return results that are within x miles of a given point. Does hive require a toolkit or plugin for this?
I am using Hadoop (220.127.116.114) running on HDInsight
Sorry, You could also just write a big mathematical function in query if I understand you use case correctly. Writing the mathematical function in query would be a headache but from a hive query perspective it should be doable.
dlon = lon2 - lon1 dlat = lat2 - lat1 a = (sin(dlat/2))^2 + cos(lat1) * cos(lat2) * (sin(dlon/2))^2 c = 2 * atan2( sqrt(a), sqrt(1-a) ) d = R * c (where R is the radius of the Earth).
And the in where condition filter based on your x miles. Taking below paths would be obviously more manageable and clean.
Yes, you would need something more than just the function supplied by Hive out of the box.
There are essentially two paths you may take.