code: func (engine *Engine) logSQL(sqlStr string, sqlArgs ...interface{}) {
  	if engine.showSQL && !engine.showExecTime {
  		if len(sqlArgs) > 0 {
  			engine.logger.Infof("[SQL] %v %#v", sqlStr, sqlArgs)
  		} else {
  			engine.logger.Infof("[SQL] %v", sqlStr)
  		}
  	}
  }
docs: // logging sql