PDOException'带消息'SQLSTATE [HY000]：常规错误：1191

Question

<?php
if(isset($_POST['searchQuery'])) {
    require_once('config.inc.php');
    $search_query=$_POST['searchQuery'];
    $sql = 'SELECT * from sanct where MATCH(Name,State,Catagory) AGAINST(:search_query)';
    $statement = $connection->prepare($sql);
    $statement->bindParam(':search_query', $search_query, PDO::PARAM_STR);
    $statement->execute();
    if($statement->rowCount()) {
        $row_all = $statement->fetchall(PDO::FETCH_ASSOC);
        header('Content-type: application/json');
        echo json_encode($row_all);
    } elseif(!$statement->rowCount()) {
        echo "no rows";
    }
}  
?>