How to Troubleshoot \"SQLSTATE[HY000]: General Error\" in Laravel PDO Database Updates?

Solving PDO Error: "SQLSTATE[HY000]: General Error" When Updating Database

In this post, we'll delve into an issue encountered when updating a database using PHP Data Objects (PDO) and address the perplexing "SQLSTATE[HY000]: General error" message.

Problem Statement

The provided code attempts to update a database using a prepared statement. However, despite the update being successful, an error message is returned.

$page = 'my_page';
$section = 'content';
$new_content = 'new_content';
$old_content = 'old_content';

try {
    $stmt = $pdo->prepare("UPDATE $page SET $section = :new_content WHERE $section = '$old_content'");
    $stmt->execute(array(
        'new_content' => $new_content
    ));
    $result = $stmt->fetchAll(); // <-- This line may cause the issue
    echo "Database updated!";
}
catch(PDOException $e) {
    echo 'ERROR UPDATING CONTENT: ' . $e->getMessage();
}

Error Message

ERROR UPDATING CONTENT: SQLSTATE[HY000]: General error

Solution

The issue lies in the call to fetchAll() in the code. fetchAll() is typically used to retrieve data from a successful query. However, for update or insert queries, this statement is unnecessary. Removing it should resolve the problem.

$result = $stmt->fetchAll(); // <-- Remove this line

Once the fetchAll() statement is removed, the code should update the database successfully without producing an error message.

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