Database Error

Error message returned from the database:

Could not execute query [Native Error: Can't create/write to file '/tmp/#sql_ce2_0.MYI' (Errcode: 28)] [User Info: SELECT CategoryPresentation.ID, CategoryPresentation.categoryID, CategoryPresentation.productID, CategoryPresentation.isSubcategories, CategoryPresentation.isVariationImages, CategoryPresentation.isAllVariations, CategoryPresentation.theme, CategoryPresentation.listStyle, Category.ID AS "Category_ID", Category.parentNodeID AS "Category_parentNodeID", Category.lft AS "Category_lft", Category.rgt AS "Category_rgt", Category.defaultImageID AS "Category_defaultImageID", Category.eavObjectID AS "Category_eavObjectID", Category.name AS "Category_name", Category.description AS "Category_description", Category.keywords AS "Category_keywords", Category.pageTitle AS "Category_pageTitle", Category.isEnabled AS "Category_isEnabled", Category.availableProductCount AS "Category_availableProductCount", Category.activeProductCount AS "Category_activeProductCount", Category.totalProductCount AS "Category_totalProductCount" FROM CategoryPresentation LEFT JOIN `Category` AS `Category` ON CategoryPresentation.categoryID = Category.ID WHERE (CategoryPresentation.categoryID=81 OR (Category.lft<=375 AND (Category.rgt>=376) AND (CategoryPresentation.isSubcategories=1))) ORDER BY CategoryPresentation.categoryID=81 DESC, Category.lft DESC]