Records in the Database: 5.

The Problem: 这段代码搜索5条记录需要很长时间，之后挂断，没有成功的结果。如果我更改\'relation\' => \'OR\' 到\'relation\' => \'AND\' 这是可行的，但这不是我在这个场景中想要的。

Is everything okay in my code?

<?php
$args = array(
    \'post_type\' => \'shipping-schedules\', 
    \'posts_per_page\' => 5,
    \'post_status\' => \'publish\',
    \'paged\' => $paged,
    \'meta_query\' => array(
    \'relation\' => \'OR\',
        array(
            \'key\' => \'schedules_port\',
            \'value\' => $sfrom,
            \'compare\' => \'LIKE\'
        ),
        array(
            \'key\' => \'schedules_port\',
            \'value\' => $sto,
            \'compare\' => \'LIKE\'
        ),
        array(
            \'key\' => \'schedules_vessel\',
            \'value\' => $svessel,
            \'compare\' => \'LIKE\'
        ),
        array(
            \'key\' => \'schedules_voyage\',
            \'value\' => $svoyage,
            \'compare\' => \'LIKE\'
        ),
        array(
            \'key\' => \'schedules_arrival\',
            \'value\' => $sdate_arrival,
            \'compare\' => \'>=\',
            \'type\' => \'NUMERIC\'
        ),
        array(
            \'key\' => \'schedules_departure\',
            \'value\' => $sdate_departure,
            \'compare\' => \'<=\',
            \'type\' => \'NUMERIC\'
        )
    )
);                              
?>