如何解决mysql插入图片后缀名问题？

Question

inventory是库存 里边包括pic这个字段，现在要是先从inventory把图片选择出来，并插入record的pic中，但是插入之后图片的后缀名（jpg）没有了？如何解决？？

下面这个是inventory这个表

部分代码如下，我试了下用字符串拼接，但是并没有什么卵用

    $sql="select * from inventory where pid = '$pid'";
    $sql2 = "update inventory set pnum = pnum-'$number' where pid = '$pid' ";
    $query=mysql_query($sql);
    $result = mysql_fetch_array($query);
    @$pnum = $result['pnum'];
    $price = $result['price'];
    $price2 = $_POST["num"]*$price;
    $suffix = ".jpg";
    $pic = $result['pic'].$suffix;

    if ($_POST["num"]!=""&&$_POST["num"]<=$pnum&&$_POST["num"]>0){
          mysql_query($sql2);
        $sql3 = "insert into record values('$uid','$pid','$number','$price2','$pic')";
        mysql_query($sql3);
         echo "<script>alert('添加成功')</script>";
       echo "<script>window.location.href = 'Test.php';</script>";
     }else if (isset($_POST["num"])&&$_POST["num"]!=""&&$_POST["num"]>$pnum&&$_POST["num"]<=0){
          echo "<script>alert('illegal input')</script>";
        echo "<script>window.location.href = 'Test.php';</script>";
      }else{
        echo "<script>alert('illegal input')</script>";
        echo "<script>window.location.href = 'Test.php';</script>";
      }

查询如下

Answer 1

检查下你这个字段是不是string类型的。可能你设置成int了