How to display all database queries made by Wordpress?

Question

Using a method similar to the one described here, I can see the total number of queries being made in Wordpress when I load a page.

Now I\'d like to display all da

Answer 1

or you can hook into posts_request. You can put the coe inside functions.php such as

add_filter('posts_request','debug_post_request'); // debugging sql query of a post

function debug_post_request($sql_text) {

   $GLOBALS['debugku'] = $sql_text; //intercept and store the sql<br/>
   return $sql_text; 

}

in your theme footer, you can use print_r like

print_r($GLOBALS['debugku']);

Answer 2

Use Query Monitor.

It's a free and open-source plugin where you can filter your queries in various contexts, such as:

• Which plugin called
• Queries that took the most time
• Duplicated queries
• You can filter by Select / Update / Insert / Delete

Among other things...

Answer 3

If you add define('SAVEQUERIES', true) to your configuration file, you can then list all the queries made for the current page by adding the following to your theme.

if (current_user_can('administrator')){
    global $wpdb;
    echo "<pre>";
    print_r($wpdb->queries);
    echo "</pre>";
}

See the documentation for more details: http://codex.wordpress.org/Editing_wp-config.php#Save_queries_for_analysis

Answer 4

I like to add at the bottom of the page, queries/elapsed time, here the code:

/**
 * show all sql at footer if it defined in wp-config.php:
 * define('SAVEQUERIES', true);
 */
function plg_name_show_debug_queries()
{
    if (defined('SAVEQUERIES') && SAVEQUERIES) {
        global $wpdb;
        if (is_array($wpdb->queries)) foreach ($wpdb->queries as $key => $q) {
            list($query, $elapsed, $debug) = $q;
            $time = number_format(($elapsed * 1000), 3);
            $count = $key + 1;
            $total_time += $elapsed;
            echo "
            <div style=\"position: relative; z-index: 9999    ; background: black; color: white; padding:10px\">
                $count - Query: $query <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Time: $time ms
            </div>";
        }
        echo "
        <div style=\"position: relative; z-index: 9999    ; background: black; color: white; padding:10px\">
            Total Queries: " . count($wpdb->queries) . "<br>Total Time: " . number_format(($total_time * 1000), 3) . " ms
        </div>";
    }
}
add_action('admin_footer', 'plg_name_show_debug_queries', PHP_INT_MAX);
add_action('wp_footer', 'plg_name_show_debug_queries', PHP_INT_MAX);