put configuration in HUE as below:

[librdbms]

  # The RDBMS app can have any number of databases configured in the databases  # section. A database is known by its section name  # (IE sqlite, mysql, psql, and oracle in the list below).  `databases`    # sqlite configuration.    ## [`sqlite`]      # Name to show in the UI.     ## nice_name=SQLite      # For SQLite, name defines the path to the database.      #name=/tmp/sqlite.db           # Database backend to use.      #engine=sqlite      # Database options to send to the server when connecting.      # https://docs.djangoproject.com/en/1.4/ref/databases/      ## options={}        # mysql, oracle, or postgresql configuration.    [`mysql`]      # Name to show in the UI.      nice_name="My SQL DB"      # For MySQL and PostgreSQL, name is the name of the database.      # For Oracle, Name is instance of the Oracle server. For express edition      # this is 'xe' by default.      name=dbname      # Database backend to use. This can be:      # 1. mysql      # 2. postgresql      # 3. oracle      engine=mysql      # IP or hostname of the database to connect to.      host=mysql-server-ip      # Port the database server is listening to. Defaults are:      # 1. MySQL: 3306      # 2. PostgreSQL: 5432      # 3. Oracle Express Edition: 1521      ## port=3306      # Username to authenticate with when connecting to the database.      user=username      # Password matching the username to authenticate with when      # connecting to the database.      password=password      # Database options to send to the server when connecting.      # https://docs.djangoproject.com/en/1.4/ref/databases/      ## options={}

restart HUE service

ok