Using Hive with PostgreSQL

Before using Hive with a new or existing PostgrSQL database; obtain the appropriate driver and .jar files, and create a Hive user with sufficient permissions.

1. On the Ambari Server host, stage the appropriate PostgreSQL connector for later deployment.
   1. On the Ambari Server host, Download the PostgreSQL JDBC Driver from PostgreSQL.
   2. Confirm that .jar is in the Java share directory.
      ls /usr/share/java/postgresql-jdbc.jar
   3. Change the access mode of the .jar file to 644.
      chmod 644 /usr/share/java/postgresql-jdbc.jar
   4. Execute the following command:
      ambari-server setup --jdbc-db=postgres --jdbc-driver=/usr/share/java/postgresql-jdbc.jar
2. Create a user for Hive and grant it permissions.
   using the PostgreSQL database admin utility:

   echo "CREATE DATABASE [HIVE_DATABASE];" | psql -U postgres
   echo "CREATE USER [HIVE_USER] WITH PASSWORD '[HIVE_PASSWORD]';" | psql -U postgres
   echo "GRANT ALL PRIVILEGES ON DATABASE [HIVE_DATABASE] TO [HIVE_USER];" | psql -U postgres

   Where [HIVE_USER] is the Hive user name, [HIVE_PASSWORD] is the Hive user password and [HIVE_DATABASE] is the Hive database name.