问题
I have connected to a clickhouse db with dbeaver and installed sqlalchemy v1.3.13 and clickhouse-sqlalchemy 0.1.3 for python 3.7.
When I tried to connect with
from sqlalchemy import create_engine
engine_clickhouse = create_engine('clickhouse://use:pass@host:port/db')
engine_clickhouse.raw_connection()
I got
Exception: Code: 516, e.displayText() = DB::Exception: default: Authentication failed: password is incorrect or there is no user with such name (version 20.3.4.10 (official build))
Does anybody know why? I didn't find a similar issue.
回答1:
This issue is well-known - look at sqlalchemy-clickhouse Issue-45 or sqlalchemy-clickhouse Issue-49.
To fix it need to explicitly downgrade the package infi.clickhouse_orm up to version 1.0.4:
requirements.txt
...
infi.clickhouse_orm==1.0.4
It allows using the _build_params-function with the behavior expected by sqlalchemy-clickhouse (following versions of infi.clickhouse_orm aren't passed the password that leads to 'Authentication failed..'-error).
Or alternatively can be used the fork where fixed this error, for example adaiboy fork.
I would avoid using the official sqlalchemy-clickhouse because:
- fixes not committed to master ("Latest commit was on 23 Jan 2019" !!)
- new featured not adding
- there are some issues with pandas etc
clickhouse-driver is the greatest alternative for sqlalchemy-clickhouse.
回答2:
According to @vladimir reply.I tried
pip uninstall infi.clickhouse_orm
pip install infi.clickhouse_orm==1.0.4
It worked for me. Thanks
来源：https://stackoverflow.com/questions/61117610/sqlalchemy-shows-code-516-authentication-failed-when-trying-to-connect-to-clic