drboyer opened a new issue #15948:
URL: https://github.com/apache/airflow/issues/15948
**Apache Airflow version**: 1.10.x (issue was partially fixed with #9843 in
1.10.12, but is not completely fixed in 1.10.15)
**Kubernetes version (if you are using kubernetes)** (use `kubectl
version`): n/a
**Environment**: not relevant here
**What happened**:
When using a Snowflake connection with the SqlSensor, the following
exception is thrown:
```
[2021-05-12 13:51:09,356] {taskinstance.py:1150} ERROR - Unknown hook type
snowflake
Traceback (most recent call last):
File
"/usr/local/lib/python3.7/site-packages/airflow/models/taskinstance.py", line
984, in _run_raw_task
result = task_copy.execute(context=context)
File
"/usr/local/lib/python3.7/site-packages/airflow/sensors/base_sensor_operator.py",
line 107, in execute
while not self.poke(context):
File
"/usr/local/lib/python3.7/site-packages/airflow/sensors/sql_sensor.py", line
87, in poke
hook = self._get_hook()
File
"/usr/local/lib/python3.7/site-packages/airflow/sensors/sql_sensor.py", line
84, in _get_hook
return conn.get_hook()
File
"/usr/local/lib/python3.7/site-packages/airflow/models/connection.py", line
309, in get_hook
raise AirflowException("Unknown hook type {}".format(self.conn_type))
airflow.exceptions.AirflowException: Unknown hook type snowflake
```
**What you expected to happen**:
The Snowflake connection is used successfully and the SQL query runs on
Snowflake.
**How to reproduce it**:
* Add a Snowflake connection
* Add a `SqlSensor` task to a DAG where the `conn_id` is the Snowflake
connection
* Attempt to run the DAG
**Anything else we need to know**:
I have a fix that I've made on our internal Airflow instances, but want to
contribute it back upstream.
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