MySQL:"SELECT将检查超过MAX_JOIN_SIZE行" [英] MySQL: "The SELECT would examine more than MAX_JOIN_SIZE rows"

问题描述

我正在使用PHP和MySQL.在我的程序中，有一个涉及联接的选择查询.当我在localhost上运行它时，它工作正常，但是当我将其上载到服务器上并尝试执行它时，它将生成以下错误:

I am using PHP and MySQL. In my program there is a select query involving joins. When I run it on localhost it's working fine but when I upload it on my server and try to execute it then it generates the following error:

The SELECT would examine more than MAX_JOIN_SIZE rows; check your WHERE and use SET SQL_BIG_SELECTS=1 or SET SQL_MAX_JOIN_SIZE=# if the SELECT is okay

我该如何纠正?

推荐答案

使用PHP时，

When using PHP, SQL_BIG_SELECTS=1 should be set in a separate query before your main query. For example:

$mysqli = new mysqli("localhost", "root", "password", "db"); 

$mysqli->query("SET SQL_BIG_SELECTS=1");  //Set it before your main query

$results = $mysqli->query("SELECT a, b, c FROM test");
while($row = $results->fetch_assoc()){
    echo '<pre>';
    print_r ($row);
    echo '</pre>';
}

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