[PrestaShopDatabaseException]

Can't create/write to file '/tmp/#sql_6ad_0.MYI' (Errcode: 28)SELECT p.*, product_shop.*, stock.out_of_stock, IFNULL(stock.quantity, 0) as quantity, pl.`description`, pl.`description_short`, pl.`link_rewrite`, pl.`meta_description`, pl.`meta_keywords`, pl.`meta_title`, pl.`name`, image_shop.`id_image`, il.`legend`, m.`name` AS manufacturer_name, DATEDIFF( product_shop.`date_add`, DATE_SUB( NOW(), INTERVAL 20 DAY ) ) > 0 AS new, pa.id_product_attribute FROM `ps_product` p INNER JOIN ps_product_shop product_shop ON (product_shop.id_product = p.id_product AND product_shop.id_shop = 1) LEFT JOIN `ps_product_lang` `pl` ON p.`id_product` = pl.`id_product` AND pl.`id_lang` = 4 AND pl.id_shop = 1 LEFT JOIN `ps_image` `i` ON i.`id_product` = p.`id_product` LEFT JOIN ps_image_shop image_shop ON (image_shop.id_image = i.id_image AND image_shop.id_shop = 1 AND image_shop.cover=1) LEFT JOIN `ps_image_lang` `il` ON i.`id_image` = il.`id_image` AND il.`id_lang` = 4 LEFT JOIN `ps_manufacturer` `m` ON m.`id_manufacturer` = p.`id_manufacturer` LEFT OUTER JOIN `ps_product_attribute` pa ON p.`id_product` = pa.`id_product` LEFT JOIN ps_product_attribute_shop product_attribute_shop ON (product_attribute_shop.id_product_attribute = pa.id_product_attribute AND product_attribute_shop.id_shop = 1 AND product_attribute_shop.default_on = 1) LEFT JOIN ps_stock_available stock ON (stock.id_product = p.id_product AND stock.id_product_attribute = IFNULL(`product_attribute_shop`.id_product_attribute, 0) AND stock.id_shop = 1 ) WHERE (product_shop.`active` = 1) AND ((image_shop.id_image IS NOT NULL OR i.id_image IS NULL) OR (image_shop.id_image IS NULL AND i.cover=1)) AND (product_shop.`visibility` IN ("both", "catalog")) AND ( DATEDIFF( product_shop.`date_add`, DATE_SUB( NOW(), INTERVAL 20 DAY ) ) > 0) AND (p.`id_product` IN ( SELECT cp.`id_product` FROM `ps_category_group` cg LEFT JOIN `ps_category_product` cp ON (cp.`id_category` = cg.`id_category`) WHERE cg.`id_group` = 1)) AND ((pa.id_product_attribute IS NULL OR product_attribute_shop.id_shop=1)) ORDER BY p.`date_add` DESC LIMIT 4
at line 605 in file classes/db/Db.php

599. 			WebserviceRequest::getInstance()->setError(500, '[SQL Error] '.$this->getMsgError().'. From '.(isset($dbg[3]['class']) ? $dbg[3]['class'] : '').'->'.$dbg[3]['function'].'() Query was : '.$sql, 97);
600. 		}
601. 		else if (_PS_DEBUG_SQL_ && $errno && !defined('PS_INSTALLATION_IN_PROGRESS'))
602. 		{
603. 			if ($sql)
604. 				throw new PrestaShopDatabaseException($this->getMsgError().'<br /><br /><pre>'.$sql.'</pre>');
605. 			throw new PrestaShopDatabaseException($this->getMsgError());
606. 		}
607. 	}
608. 
609. 	/**