How to get a conn for sql query?

I want to manually build query using pypika.

    conn = await pg.get_connection()
    user = Table('user')
    q = Query.from_(user).select('*')
    print(q.get_sql())
    values = await conn.fetch(q.get_sql())

How to get a connection by Tortoise-orm and make a query?

[lntuition]

@jet10000 Unfortunately, tortoise doesn’t execute raw sql yet. We should consider from #139.

[jet10000]

I have referred to this document, but I want to handle raw sql query.