code: func (engine *Engine) Quote(value string) string {
  	value = strings.TrimSpace(value)
  	if len(value) == 0 {
  		return value
  	}
  
  	if string(value[0]) == engine.dialect.QuoteStr() || value[0] == '`' {
  		return value
  	}
  
  	value = strings.Replace(value, ".", engine.dialect.QuoteStr()+"."+engine.dialect.QuoteStr(), -1)
  
  	return engine.dialect.QuoteStr() + value + engine.dialect.QuoteStr()
  }
docs: // Quote Use QuoteStr quote the string sql