Database

Re: Sql server deadlock issue with table bulk insert and update on same table

1-Jul-20 0:31

Sorry, I don't know. Check the documentation to see what it recommends.

David Mujica1-Jul-20 6:36

David Mujica

1-Jul-20 6:36

If you are using a script to initiate the bulk load, at the end of the script start the process for updating.
That is a simple way of synchronizing the processes.
Java | [Coffee]

Re: Sql server deadlock issue with table bulk insert and update on same table

kali siddhu16-Jul-20 0:44

kali siddhu

16-Jul-20 0:44

Both process are different based to the file availability process will kick start. Monthly I am getting deadlock issue when both the files are available at same time by utilizing the same table.

As per my knowledge, I need to set lock/ Isolation level at store procedure to overcome this issue.

Re: Sql server deadlock issue with table bulk insert and update on same table

ZurdoDev1-Jul-20 8:03

ZurdoDev

1-Jul-20 8:03

Do one then do the other.

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Http 500 error with register page

and180y29-Jun-20 5:31

29-Jun-20 5:31

Hi Could anyone help me with the following code? It was working fine until I inserted a username column in the DB table and edited this to suit (I thought) It gives an HTTP500 error page not working.

<?php
// Include config file
require_once "config.php";
 
// Define variables and initialize with empty values
$email = $password = $confirm_password = "";
$username_err = $username = $confirm_username_err = "";
$email_err = $password_err = $confirm_password_err = "";
 
// Processing form data when form is submitted
if($_SERVER["REQUEST_METHOD"] == "POST"){
 
    // Validate username
    if(empty(trim($_POST["email"]))){
        $email_err = "Please enter your email.";
    } else{
        // Prepare a select statement
        $sql = "SELECT id FROM users WHERE email = ?";
        
        if($stmt = mysqli_prepare($link, $sql)){
            // Bind variables to the prepared statement as parameters
            mysqli_stmt_bind_param($stmt, "s", $param_email);
            
            // Set parameters
            $param_email = trim($_POST["email"]);
            
            // Attempt to execute the prepared statement
            if(mysqli_stmt_execute($stmt)){
                /* store result */
                mysqli_stmt_store_result($stmt);
                
                if(mysqli_stmt_num_rows($stmt) == 1){
                    $email_err = "This email is already registered.";
                } else{
                    $email = trim($_POST["email"]);
                }
            } else{
                echo "Oops! Something went wrong. Please try again later.";
            }

            // Close statement
            mysqli_stmt_close($stmt);
        }
	 }
    
    // Validate username
    if(empty(trim($_POST["username"]))){
        $username_err = "Please enter a username.";     
    } elseif(strlen(trim($_POST["username"])) < 6){
        $username_err = "username must have atleast 6 characters.";
    } else{
        $username = trim($_POST["username"]);
    }	
    }
    
    // Validate password
    if(empty(trim($_POST["password"]))){
        $password_err = "Please enter a password.";     
    } elseif(strlen(trim($_POST["password"])) < 6){
        $password_err = "Password must have atleast 6 characters.";
    } else{
        $password = trim($_POST["password"]);
    }
    
    // Validate confirm password
    if(empty(trim($_POST["confirm_password"]))){
        $confirm_password_err = "Please confirm password.";     
    } else{
        $confirm_password = trim($_POST["confirm_password"]);
        if(empty($password_err) && ($password != $confirm_password)){
            $confirm_password_err = "Password did not match.";
        }
    }
    
    // Check input errors before inserting in database
    if(empty($email_err) && empty($password_err) && empty($confirm_password_err)){
        
        // Prepare an insert statement
        $sql = "INSERT INTO users (email, username, password) VALUES (?, ?)";
         
        if($stmt = mysqli_prepare($link, $sql)){
            // Bind variables to the prepared statement as parameters
            mysqli_stmt_bind_param($stmt, "ss", $param_email,$param_username $param_password);
            
            // Set parameters
            $param_email = $email;
			$param_username = $username
            $param_password = password_hash($password, PASSWORD_DEFAULT); // Creates a password hash
            
            // Attempt to execute the prepared statement
            if(mysqli_stmt_execute($stmt)){
                // Redirect to login page
                header("location: login.php");
            } else{
                echo "Something went wrong. Please try again later.";
            }

            // Close statement
            mysqli_stmt_close($stmt);
        }
    }
    
    // Close connection
    mysqli_close($link);
}
?>
 
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Sign Up</title>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.css">
    <style type="text/css">
        body{ font: 14px sans-serif; }
        .wrapper{ width: 350px; padding: 20px; }
    </style>
</head>
<body>
    <div class="wrapper">
        <h2>Sign Up</h2>
        <p>Please fill this form to create an account.</p>
        <form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post">
            <div class="form-group <?php echo (!empty($email_err)) ? 'has-error' : ''; ?>">
                <label>Email</label>
                <input type="text" name="email" class="form-control" value="<?php echo $email; ?>">
                <?php echo $email_err; ?>
            </div>
			<form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post">
            <div class="form-group <?php echo (!empty($username_err)) ? 'has-error' : ''; ?>">
                <label>Username</label>
                <input type="text" name="username" class="form-control" value="<?php echo $username; ?>">
                <?php echo $username_err; ?>
            </div> 
            <div class="form-group <?php echo (!empty($password_err)) ? 'has-error' : ''; ?>">
                <label>Password</label>
                <input type="password" name="password" class="form-control" value="<?php echo $password; ?>">
                <?php echo $password_err; ?>
            </div>
            <div class="form-group <?php echo (!empty($confirm_password_err)) ? 'has-error' : ''; ?>">
                <label>Confirm Password</label>
                <input type="password" name="confirm_password" class="form-control" value="<?php echo $confirm_password; ?>">
                <?php echo $confirm_password_err; ?>
            </div>
            <div class="form-group">
                <input type="submit" class="btn btn-primary" value="Submit">
                <input type="reset" class="btn btn-default" value="Reset">
            </div>
            <p>Already have an account? <a href="login.php">Login here</a>.</p>
        </form>
    </div>    
</body>
</html>

ZurdoDev29-Jun-20 5:33

ZurdoDev

29-Jun-20 5:33

500 is a generic error from the server. You'll need to debug it or get the details of the error.

Social Media - A platform that makes it easier for the crazies to find each other.

Everyone is born right handed. Only the strongest overcome it.
Fight for left-handed rights and hand equality.

and180y29-Jun-20 5:45

29-Jun-20 5:45

Thanks for replying ZurdoDev. Smile | :)

I was thinking it had to be something in the prepared statement that I have done wrong but can't figure it out. I ran a query to create the table and columns so assume that must be correct?

ZurdoDev29-Jun-20 5:49

ZurdoDev

29-Jun-20 5:49

Somewhere you should be able to get the details of the error. I don't do much php but if you aren't seeing the error when you run it then maybe look in the logs.

Social Media - A platform that makes it easier for the crazies to find each other.

Everyone is born right handed. Only the strongest overcome it.
Fight for left-handed rights and hand equality.

Richard Deeming29-Jun-20 6:15

Richard Deeming

29-Jun-20 6:15

and180y wrote:

PHP

$sql = "INSERT INTO users (email, username, password) VALUES (?, ?)";
...
mysqli_stmt_bind_param($stmt, "ss", $param_email, $param_username $param_password);

Two obvious problems:

You're inserting into three columns, but you've only specified two values:

PHP

$sql = "INSERT INTO users (email, username, password) VALUES (?, ?, ?)";

You've only specified types for two parameters, and you're missing a comma between the last two parameters:

PHP

mysqli_stmt_bind_param($stmt, "sss", $param_email, $param_username, $param_password);

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

and180y29-Jun-20 6:21

29-Jun-20 6:21

Thanks for replying Richard. Smile | :)

I've fixed those errors but still having the same issue, it loaded the form once but now just a white page with the error.

and180y29-Jun-20 8:40

29-Jun-20 8:40

I have played around starting again from the basic code and adding in what I need and checking for errors, all is fine till I put the code below in.

 }

// Validate email
if(empty(trim($_POST["email"]))){
    $email_err = "Please enter your email.";
} elseif(strlen(trim($_POST["email"])) < 6){
    $email_err = "email must have at least 6 characters.";
} else{
    $email = trim($_POST["email"]);
}

Richard MacCutchan29-Jun-20 10:36

29-Jun-20 10:36

PHP

if(empty(trim($_POST["email"]))){

If the email variable is blank then calling trim on it will fail. You should change it to:

PHP

if(empty($_POST["email"])){

and180y29-Jun-20 13:37

29-Jun-20 13:37

Working perfect now. Thanks Richard. Smile | :)

Richard MacCutchan29-Jun-20 22:44

29-Jun-20 22:44

You're welcome.

and180y1-Jul-20 9:03

1-Jul-20 9:03

Richard, is there an error log generated somewhere for the DB? I get an intermittent fault (loads of folk saying the can't register but I can see some are able to) This is the error that shows on the form so not of much use. lol "Something went wrong. Please try again later".

Richard MacCutchan1-Jul-20 10:10

1-Jul-20 10:10

Sorry, I don't know offhand. Check the MySQL documentation. I see that you are posting that message in your code. So you need to check why the call to mysqli_stmt_execute failed.

and180y1-Jul-20 10:42

1-Jul-20 10:42

Thanks Richard,

I edited as you said the other night but wonder if my issue is somewhere in here?

if(empty($_POST["email"])){
     $email_err = "Please enter your email.";
 } elseif(strlen(trim($_POST["email"])) < 6){
     $email_err = "email must have at least 6 characters.";
 } else{
     $email = trim($_POST["email"]);
 }
 }

and180y1-Jul-20 14:11

1-Jul-20 14:11

Thanks Richard, progress made.

There is no error as such, if you try to register with the same email twice (yes I thought that as well) it throws the error I mentioned but isn't telling them the email is already registered. It does for username but the email was the bit I added in. Smile | :)

Richard MacCutchan1-Jul-20 23:37

1-Jul-20 23:37

Did you not realise that you first need to check whether the email is already registered?

and180y2-Jul-20 5:57