Nested WP Query Arguments

nested-wp-query-arguments.php

<?php
$sitesuper_notification_args = array(
	'post_type' 		=> 'cs_submissions',
	'post_status'		=> 'publish',
	'posts_per_page'	=> -1,
	'orderby'		=> 'date',
	'order'			=> 'DESC',
	  //The meta_query will list any customer satisfaction survey responses that answered a question negatively or below an accepted threshold.
	  //It also only lists those items that have NOT yet been flagged as 'resolved'.
	  'meta_query'		=> array(
		'relation' 		=> 'OR',
		array(
			'relation'		=> 'AND',
			array(
				'key' 		=> 'overall_rating',
				'value' 	=> 8,
				'type'    	=> 'numeric',
				'compare' 	=> '<='
			),
			array(
				'key'		=> 'overall_rating_resolved',
				'value'		=> 'false',
				'compare'	=> '='
			),
		),
		array(
			'relation'		=> 'AND',
			array(
				'key' 		=> 'frontdesk_staff',
				'value' 	=> 'false',
				'compare' 	=> '='
			),
			array(
				'key'		=> 'frontdesk_staff_resolved',
				'value'		=> 'false',
				'compare'	=> '='
			),
		),
		array(
			'relation'		=> 'AND',
			array(
				'key' 		=> 'recommend_us',
				'value' 	=> 'false',
				'compare' 	=> '='
			),
			array(
				'key'		=> 'recommend_us_resolved',
				'value'		=> 'false',
				'compare'	=> '='
			),
		),
	),
);
?>

Note: This has repeatedly caused a gateway timeouts on some low resource servers.