Question

我正在尝试使用PDO调用SP（存储过程）。

try {
    // Connecting using the PDO object.
    $conn = new PDO("mysql:host=$host; dbname=$dbname", $user, $password);        

    $stmt = $conn->prepare('CALL sp_user(?,?,@user_id,@product_id)');    
    $stmt->execute(array("demouser", "demoproduct"));
    $result = $stmt->fetchAll();
    print_r($result);
}
// Catching it if something went wrong.
catch(PDOException $e) {
  echo "Error : ".$e->getMessage();
}

SP成功执行并将数据插入相关表格，并假设返回新插入的ID。但是当我打印结果时，我得到一个空数组。

有什么建议吗？

以下是我正在使用的SP：

DELIMITER $$
DROP PROCEDURE IF EXISTS `test`.`sp_user`$$
CREATE PROCEDURE `sp_user`(
    IN user_name VARCHAR(255),
    IN product_name VARCHAR(255),
    OUT user_id INT(11),
    OUT product_id INT(11)
)
BEGIN       
    START TRANSACTION;      
        INSERT INTO `user` (`name`) VALUES(user_name);
        SET user_id := LAST_INSERT_ID();        
        INSERT INTO `product` (`name`) VALUES(product_name);        
        SET product_id := LAST_INSERT_ID();         
        INSERT INTO `map_user_product` (`user_id`,`product_id`) VALUES(user_id,product_id); 
    commit;
END$$
DELIMITER ;

编辑：从不担心。

我认为通过使用$ result变量，我将能够获取OUT变量的值。但后来我发现我需要使用另一个SQL查询来获取那些输出变量。

$stmt = $conn->query("SELECT @user_id,@product_id");

Answer 1

试试这个......

try 
{
    // Connecting using the PDO object.
    $conn = new PDO("mysql:host=$host; dbname=$dbname", $user, $password);        

    $stmt = $conn->prepare('CALL sp_user(:demouser, :demoproduct, @user_id, @product_id)'); 

    $demouser = "demouser";
    $demoproduct = "demoproduct";

    $stmt->bindParam(":demouser", $demouser, PDO::PARAM_STR, 255);
    $stmt->bindParam(":demoproduct", $demoproduct, PDO::PARAM_STR, 255);
    $stmt->execute();

    $result = $conn->query("select @user_id, @product_id;")->fetchAll();

    print_r($result);

    foreach($result as $row)
    {
        echo $row["@user_id"];
        echo $row["@product_id"];
    }

}
// Catching it if something went wrong.
catch(PDOException $e) 
{
  echo "Error : ".$e->getMessage();
}

Answer 2

您可以使用以下代码获取最后插入的ID：PDO::lastInsertId();

我认为您目前正在从fetchAll返回数组，我认为其中不包含ID：http://php.net/manual/en/pdostatement.fetchall.php

Answer 3

尝试这个

DELIMITER $$
DROP PROCEDURE IF EXISTS `test`.`sp_user`$$
CREATE PROCEDURE `sp_user`(
    IN user_name VARCHAR(255),
    IN product_name VARCHAR(255)
)
BEGIN       
    START TRANSACTION;      
        INSERT INTO `user` (`name`) VALUES(user_name);
        SET user_id := LAST_INSERT_ID();        
        INSERT INTO `product` (`name`) VALUES(product_name);        
        SET product_id := LAST_INSERT_ID();         
        INSERT INTO `map_user_product` (`user_id`,`product_id`) VALUES(user_id,product_id); 
    commit;

    SELECT user_id, product_id;

END$$
DELIMITER ;

PHP中的

$result = $conn->query("CALL sp_user(demouser, demoproduct)")->fetchAll();
var_dump($result);

PHP PDO：存储过程返回空结果

3 个答案: