php - MySQL 查询错误-没有为准备好的语句中的参数提供数据

Question

我对 MySQL 比较陌生，我正在尝试像在其他地方看到的那样组合插入和更新语句。对于以下代码，

$query = "this is not the problem";
$ora_stmt = oci_parse($conn, $query);
$result = oci_execute($ora_stmt);
$stmt1 = $mysqli1->prepare("INSERT INTO na_dslam_card (n_alias, shelf_pt_num, card_pt_num, card_pt_description)
                            VALUES (?, ?, ?, ?)
                            ON DUPLICATE KEY UPDATE n_alias=?, shelf_pt_num=?, card_pt_num=?, card_pt_description=?");

while($row = oci_fetch_array($ora_stmt, OCI_ASSOC+OCI_RETURN_NULLS)) {
    print  $row['DSLAM'] . "," . $row['MODEL']  . "," . $row['VENDOR'] . "," . $row['BROADBAND_CIRCUIT_ID'] . "," . $row['SVC_N'] . "," . $row['PORT_ADDR_STATUS']. "," . $row['BROADBAND_CIRCUIT_ID'] . "," . $row['RACK'] . "," . $row['SHELF'] . "," .  $row['SLOT'] . "," . $row['PORT'] . "," . $row['SHELF_PT_NUMBER'] . "," .  $row['CARD_PT_NUMBER'] . "," . $row['CARD_PT_DESCRIPTION'] . "\n";
    $stmt1->bind_param("ssss", $row['DSLAM'],$row['SHELF_PT_NUMBER'],$row['CARD_PT_NUMBER'],$row['CARD_PT_DESCRIPTION']); 
    if(!$stmt1->execute())
    { 
      $tempErr = "Error setting card info: " . $stmt1->error;
      printf($tempErr . "\n");  //show mysql execute error if exists  
      $err->logThis($tempErr);
    } 
} //while

我收到此错误消息:

Error setting card info: No data supplied for parameters in prepared statement

我用的是bind_parameters，所以不能说我没有提供参数数据。我知道 rack 有时可以为 null，但在那种情况下它不会只是将它设置为 null 吗？我知道 oracle 查询有效，因为打印语句显示:

CNVLDAT00,TA12,Ad,196,641,In Service,196,,2,,7,117,115,11L5

那么为什么没有正确提供参数呢？我觉得没问题。

我看了insert values我认为我做得很好。

我的表格是这样的:

na_dslam_card:指数n_别名shelf_pt_numcard_pt_numcard_pt_description

感谢您的帮助...

Answer 1

SQL 文本中有八个绑定(bind)占位符。我们需要提供八个值。

bind_param 仅提供四个值。

但我们可以修改 SQL 文本，用 VALUES() 函数替换 UPDATE 子句中的占位符，而不是提供八个值，以引用本应插入到列中的值.

INSERT INTO na_dslam_card
( n_alias
, shelf_pt_num
, card_pt_num
, card_pt_description
)  
VALUES (?, ?, ?, ?)
ON DUPLICATE KEY
UPDATE n_alias             = VALUES(alias)
     , shelf_pt_num        = VALUES(shelf_pt_num)
     , card_pt_num         = VALUES(card_pt_num)
     , card_pt_description = VALUES(card_pt_description)

现在只有四个占位符需要值。

---

摘自 MySQL 引用手册:

In assignment value expressions in the ON DUPLICATE KEY UPDATE clause, you can use the VALUES(col_name) function to refer to column values from the INSERT portion of the INSERT ... ON DUPLICATE KEY UPDATE statement. In other words, VALUES(col_name) in the ON DUPLICATE KEY UPDATE clause refers to the value of col_name that would be inserted, had no duplicate-key conflict occurred.

引用资料:

https://dev.mysql.com/doc/refman/5.7/en/insert-on-duplicate.html

https://dev.mysql.com/doc/refman/5.7/en/miscellaneous-functions.html#function_values