This document discusses Hive on Spark, which allows Apache Hive queries to run on Apache Spark. It provides background on Hive, Spark, and their limitations. Hive on Spark was developed by the Hive community to leverage Spark's more efficient execution while maintaining compatibility. Examples are given of how simple and join queries are translated from Hive operations to Spark transformations and actions. Improvements to Spark needed to better support Hive are also outlined. The author thanks contributors from various organizations working on Hive on Spark.