Create instance if not exists.

GsqlNew create a new Gsql object and return.

Update instance if instance exists.

ErrAlreadyExists is thrown when db instance already exists.

ErrInstanceNotReady is thrown when gsql instance is still not marked as Ready.

ErrNotExists is thrown when db instance does not exists.

Generic represents database instance which can be connected by address and port.

Gsql represents a google sql instance.

DbInstance interface to operate database server.