How to configure a datasource Extra parameter?

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.

Superset version

0.999.0dev more ./superset/assets/package.json``installed by docker

Expected results

press save button, engine param can be configered correctly

Actual results

Invalid argument(s) ‘pool_size’,‘max_overflow’ sent to create_engine(), using configuration PGDialect_psycopg2/NullPool/Engine. Please check that the keyword arguments are appropriate for this combination of components.

Steps to reproduce

1. go to Edit Database Page
2. config Extra section
3. save button

[lhyundeadsoul]

Please try wrap arguments by “connect_args”

"engine_params": {"connect_args": {"pool_size": 10: "max_overflow": 20}}

reference from https://docs.sqlalchemy.org/en/latest/core/engines.html?highlight=create_engine#sqlalchemy.create_engine

Thanks for help!

But i got a following error

(psycopg2.ProgrammingError) invalid dsn: invalid connection option “pool_size” (Background on this error at: http://sqlalche.me/e/f405)

I have checked the doc out, and i supposed that the “pool_size” and “connect_args” might be in one level ,rather than “pool_size” is underlying the “connect_args”

thank you any way @zhaoyongjie

[zhaoyongjie]

Please try wrap arguments by “connect_args”

"engine_params": {"connect_args": {"pool_size": 10: "max_overflow": 20}}

reference from https://docs.sqlalchemy.org/en/latest/core/engines.html?highlight=create_engine#sqlalchemy.create_engine