Thus resulting in loss of precision (e.x: 9223372036854775807 => 9223372036854776000).

I have only been working with Postgres, so I don't know if this happens for MySQL etc. as well.
This may very well be an issue with the node-postgres module, so I will look into it further.

The issue wasn't "visible" on the tests due to the use of toEqual that effectively does

9223372036854776000 == '9223372036854775807' //true

I made a PR with the updated test #632