return false
		}
		// alternate between bad conn and not bad conn
		c.db.badConn = !c.db.badConn
		return c.db.badConn
	} else {
		return false
	}
}

func (c *fakeConn) isDirtyAndMark() bool {
	if c.skipDirtySession {
		return false
	}
	if c.currTx != nil {
		c.dirtySession = true
		return false
	}
	if c.dirtySession {
		return true
	}
	c.dirtySession = true