superset: Superset connection MS SQL Server failed.(WARNING:superset.views.core:Connection failed (pymssql.OperationalError))

A clear and concise description of what the bug is.

Expected results

I want to connection mssql use pymssql model(Install: pip3 install pymssql)

Actual results

but it doesn’t work.

my connection link is : 'mssql+pymssql://username:password@db_host:1433/database'

the error logs :

WARNING:superset.views.core:Connection failed (pymssql.OperationalError) (20002, b'DB-Lib error message 20002, severity 9:\nAdaptive Server connection failed (10.xx.xx.xx)\n')
(Background on this error at: http://sqlalche.me/e/13/e3q8)
INFO:werkzeug:10.xx.xx.xx0 - - [22/Sep/2020 11:10:56] "POST /superset/testconn HTTP/1.1" 400 -
Connection failed (pymssql.OperationalError) (20002, b'DB-Lib error message 20002, severity 9:\nAdaptive Server connection failed (10.xx.xx.xx)\n')
(Background on this error at: http://sqlalche.me/e/13/e3q8)
WARNING:superset.views.core:Connection failed (pymssql.OperationalError) (20002, b'DB-Lib error message 20002, severity 9:\nAdaptive Server connection failed (10.xx.xx.xx)\n')
(Background on this error at: http://sqlalche.me/e/13/e3q8)
INFO:werkzeug:10.xx.xx.xx- - [22/Sep/2020 11:16:57] "POST /superset/testconn HTTP/1.1" 400 -

Screenshots

How to reproduce the bug

1. Go to ‘source–> databases–>add a new record -->Database [mssql] --> SQLAlchemy URI -->mssql+pymssql://username:password@db_host:1433/database’
2. Click on ‘TEST CONNECTION’
3. Scroll down to ‘You will see some error’
4. See error:ERROR: Connection failed, please check your connection settings.

Environment

(please complete the following information):

• superset version: superset version Superset 0.37.1
• python version: python --version Python 3.6.8
• node.js version: node -v
• npm version: npm -v
• pip3 list

(venv) [root@operation ~]# pip3 list 
DEPRECATION: The default format will switch to columns in the future. You can use --format=(legacy|columns) (or define a format=(legacy|columns) in your pip.conf under the [list] section) to disable this warning.
aiohttp (3.6.2)
alembic (1.4.3)
amqp (2.6.1)
apache-superset (0.37.1)
apispec (3.3.2)
async-timeout (3.0.1)
attrs (20.2.0)
Babel (2.8.0)
backoff (1.10.0)
billiard (3.6.3.0)
bitarray (1.5.3)
bleach (3.2.0)
Brotli (1.0.9)
cachelib (0.1.1)
celery (4.4.7)
cffi (1.14.3)
chardet (3.0.4)
click (7.1.2)
colorama (0.4.3)
contextlib2 (0.6.0.post1)
croniter (0.3.34)
cryptography (3.1)
dataclasses (0.6)
decorator (4.4.2)
defusedxml (0.6.0)
dnspython (2.0.0)
email-validator (1.1.1)
Flask (1.1.2)
Flask-AppBuilder (3.0.1)
Flask-Babel (1.0.0)
Flask-Caching (1.9.0)
Flask-Compress (1.5.0)
Flask-JWT-Extended (3.24.1)
Flask-Login (0.4.1)
Flask-Migrate (2.5.3)
Flask-OpenID (1.2.5)
Flask-SQLAlchemy (2.4.4)
flask-talisman (0.7.0)
Flask-WTF (0.14.3)
future (0.18.2)
geographiclib (1.50)
geopy (2.0.0)
gunicorn (20.0.4)
humanize (2.6.0)
idna (2.10)
idna-ssl (1.1.0)
impala (0.2)
importlib-metadata (1.7.0)
impyla (0.16.2)
isodate (0.6.0)
itsdangerous (1.1.0)
Jinja2 (2.11.2)
jsonschema (3.2.0)
kombu (4.6.11)
Mako (1.1.3)
Markdown (3.2.2)
MarkupSafe (1.1.1)
marshmallow (3.8.0)
marshmallow-enum (1.5.1)
marshmallow-sqlalchemy (0.23.1)
msgpack (1.0.0)
multidict (4.7.6)
mysqlclient (2.0.1)
natsort (7.0.1)
numpy (1.19.2)
packaging (20.4)
pandas (1.0.5)
parsedatetime (2.6)
pathlib2 (2.3.5)
pip (9.0.3)
ply (3.11)
polyline (1.4.0)
prison (0.1.3)
py (1.9.0)
pyarrow (0.17.1)
pycparser (2.20)
PyHive (0.6.3)
PyJWT (1.7.1)
pymssql (2.1.5)
pyodbc (4.0.30)
pyparsing (2.4.7)
pyrsistent (0.17.3)
python-dateutil (2.8.1)
python-dotenv (0.14.0)
python-editor (1.0.4)
python-geohash (0.8.5)
python3-openid (3.2.0)
pytz (2020.1)
PyYAML (5.3.1)
retry (0.9.2)
sasl (0.2.1)
selenium (3.141.0)
setuptools (39.2.0)
simplejson (3.17.2)
six (1.15.0)
slackclient (2.5.0)
SQLAlchemy (1.3.19)
sqlalchemy-exasol (2.2.0)
SQLAlchemy-Utils (0.36.8)
sqlparse (0.3.0)
thrift (0.13.0)
thrift-sasl (0.4.2)
thriftpy2 (0.4.11)
typing-extensions (3.7.4.3)
urllib3 (1.25.10)
vine (1.3.0)
webencodings (0.5.1)
Werkzeug (1.0.1)
WTForms (2.3.3)
WTForms-JSON (0.3.3)
yarl (1.5.1)
zipp (3.1.0)

Checklist

Make sure these boxes are checked before submitting your issue - thank you!

• [* ] I have checked the superset logs for python stacktraces and included it here as text if there are any.
• [ *] I have reproduced the issue with at least the latest released version of superset.
• [ *] I have checked the issue tracker for the same issue and I haven’t found one similar.

Additional context

I found the superset Documentation suggestion to use pymssql too : https://superset.incubator.apache.org/docs/databases/sql-server I used the suggestion and test but it still doesn’t work: mssql+pymssql://UserName@DB:Password@DB_Host:1433/TestSchema

Please help me how to resolve this problem ? Have any suggestion pleast just let me know , thanks.