id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	article_cat	NULL	const	PRIMARY	PRIMARY	4	const	1	100.00	NULL
1	SIMPLE	article_cat_lang	NULL	const	PRIMARY,fk_article_cat_lang_lang	PRIMARY	8	const,const	1	100.00	NULL