mingrammer commented on a change in pull request #6432: [AIRFLOW-5758] Support
the custom cursor classes for the PostgreSQL hook
URL: https://github.com/apache/airflow/pull/6432#discussion_r339304130
##########
File path: airflow/hooks/postgres_hook.py
##########
@@ -67,6 +68,13 @@ def get_conn(self):
password=conn.password,
dbname=self.schema or conn.schema,
port=conn.port)
+ if conn.extra_dejson.get('cursor', False):
+ if (conn.extra_dejson['cursor']).lower() == 'dictcursor':
+ conn_args['cursor_factory'] = psycopg2.extras.DictCursor
+ elif (conn.extra_dejson['cursor']).lower() == 'realdictcursor':
+ conn_args['cursor_factory'] = psycopg2.extras.RealDictCursor
+ elif (conn.extra_dejson['cursor']).lower() == 'namedtuplecursor':
+ conn_args['cursor_factory'] = psycopg2.extras.NamedTupleCursor
Review comment:
Hm, wait. `conn` is a local variable for `get_conn` method. So we should get
the connection in the `_get_cursor` again by
```python
conn_id = getattr(self, self.conn_name_attr)
conn = self.get_connection(conn_id)
```
So `get_connection` will be called twice when cursor class is specified. Is
it ok?
Or we can pass the `conn.extra_dejson['cursor']` to the `_get_cursor` from
`get_conn`.
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