Spark integration with Hive
You need to know a little about Hive Warehouse Connector (HWC) and how to find more information because to access Hive from Spark, you need to use HWC implicitly or explicitly.
Spark and Hive tables interoperate using the Hive Warehouse Connector and Spark Direct Reader to access ACID managed tables. The Hive Warehouse Connector is designed to access managed ACID v2 Hive tables from Spark. HWC is a Spark library/plugin that is launched with the Spark app.
You can access external tables from Spark directly using SparkSQL. You do not need HWC to read or write Hive external tables. Spark users just read from or write to Hive directly. You can read Hive external tables in ORC or Parquet formats. You can write Hive external tables in ORC format only.
Use the Spark Direct Reader and HWC for ETL jobs. For other jobs, consider using Apache Ranger and the HiveWarehouseConnector library to provide row and column, fine-grained access to the data.
HWC supports spark-submit and pyspark. The spark thrift server is not supported.