Enable DB Query in HUE web UI

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