from django.db.backends import BaseDatabaseClient

class DatabaseClient(BaseDatabaseClient):

    executable_name = 'psql'

    def runshell(self):

        args = [self.executable_name]

        if settings.DATABASE_USER:

            args += ["-U", settings.DATABASE_USER]

        if settings.DATABASE_PASSWORD:

            args += ["-W"]

        if settings.DATABASE_HOST:

            args.extend(["-h", settings.DATABASE_HOST])

        if settings.DATABASE_PORT:

            args.extend(["-p", str(settings.DATABASE_PORT)])

        args += [settings.DATABASE_NAME]

        os.execvp(self.executable_name, args)