[FEATURE] SQLException should includes a SQLState

[cornmonster]

Is your feature request related to a problem? Please describe.
SQLException should includes a SQLState so that the user of JDBC driver could get more info about the error.

Describe the solution you'd like
Something like https://www.postgresql.org/docs/9.4/errcodes-appendix.html

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.