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$meta_query = array(
	'relation' => 'OR',
	array(
		'key'     => 'customer',
		'value'   => 'hhh',
		'compare' => '=',
	),
	array(
		'key'     => 'userID',
		'value'   => 'uuu',
		'compare' => '=',
		'type'    => 'NUMERIC',
	),
);