Question

我无法弄清楚我的查询有什么问题。我有三个控制帖子顺序的元素：quartier，block和number。它运作良好。

我想添加一个名为street的第四个。当我这样做时，什么也没有。我想也许street存在问题，但是如果我离开street但是删除了block，它会再次运行并适当地使用street。

我的结论是数据库每次查询只接受有限数量的选择器。真的吗？或者我错过了什么？

$query = "SELECT `wp_posts`.`post_title` , `wp_posts`.`ID` , `end`.`meta_value` AS `enddate` , `start`.`meta_value` as `startdate`, `quartier`.`meta_value` AS `thequartier`, `street`.`meta_value` AS `thestreet`, `number`.`meta_value` AS `thenumber`, `block`.`meta_value` AS `theblock`
        FROM `wp_posts` , `wp_postmeta` AS `end` , `wp_postmeta` AS `start` , `wp_postmeta` AS `quartier`, `wp_postmeta` AS `street`, `wp_postmeta` AS `number`, `wp_postmeta` AS `block`

        WHERE `wp_posts`.`post_type` = 'listing'

        AND `wp_posts`.`ID` = `end`.`post_id`
        AND `wp_posts`.`ID` = `start`.`post_id`
        AND `wp_posts`.`ID` = `quartier`.`post_id`
        AND `wp_posts`.`ID` = `street`.`post_id`
        AND `wp_posts`.`ID` = `block`.`post_id`
        AND `wp_posts`.`ID` = `number`.`post_id`

        AND `end`.`meta_key` = 'theend'
        AND `end`.`meta_value` >= '".time()."'

        AND `start`.`meta_key` = 'thestart'
        AND `start`.`meta_value` <= '".time()."'

        AND `quartier`.`meta_key` = 'quartier'
        AND `street`.`meta_key` = 'street'
        AND `number`.`meta_key` = 'number'
        AND `block`.`meta_key` = 'block'

        AND `wp_posts`.`post_status` = 'publish'

        GROUP BY `wp_posts`.`ID`
        ORDER BY `thequartier` + 0 ASC";
        $calendar = $wpdb->get_results($query, ARRAY_A);


        foreach ($calendar as $key => $row) {
            $thequartier[$key]  = $row['thequartier'];
            $thestreet[$key] = $row['thestreet'];
            $theblock[$key] = $row['theblock'];
            $thenumber[$key] = $row['thenumber'];
        }

        // Sort the data with volume descending, edition ascending
        array_multisort($thequartier, SORT_ASC, $theblock, SORT_ASC, $thestreet, SORT_ASC, $thenumber, SORT_ASC, $calendar);

更新：我找到了我的问题的解决方案，添加以下行以允许过多的选择器：

$wpdb->query("SET SQL_BIG_SELECTS=1");

SQL查询选择器数量有限

0 个答案: