@return 0, HA_ERR_END_OF_FILE, or error number*/UNIV_INTERNintha_innobase::rnd_next(/*===*/uchar* buf)/*!< in/out: returns the row in this buffer, in MySQL format*/{interror; DBUG_ENTER("rnd_next"); ha_statistic_increment(&SSV::ha_read_rnd_next_count);if(start_of_scan)...
4. Handler_read_rnd_next不宜过大,过大的话,代表全表扫描过多,要引起足够的警惕。
Handler_read_rnd_next A description for this Status Variable has not yet been added to this Documentation. See also: Status Variables for MariaDB Enterprise Server 11.4, in 10.6 ES, in 10.5 ES, in 10.4 ES, in 10.3 ES, in 10.2 ES, in 10.6 CS, in 10.5 CS, in 10.4 CS, in 10.3 CS...
用show status like 'Handler_read%';查看你的索引使用情况,Handler_read_rnd_next 很高意味着查询效率低下,说明你要换 一个索引值。然后用show profile看看你的..
| Handler_read_rnd_next | 41 | +---+---+ 1 row in set (0.00 sec) mysql> show status like "Handler_read_rnd_next"; +---+---+ | Variable_name | Value | +---+---+ | Handler_read_rnd_next | 43 | +---+---+ 1 row ...
下列代码的功能是产生4位随机数并保存,在“___”处应填入。Random rnd=new Random(); int randNum=rnd.nextInt(8999)+1000; String ranStr=String.valueOf(randNum); ___ A.page.setAttribute("randStr",randStr);B.request.setAttribute("randStr",randStr);C.session.setAttribute("randStr",randStr)...
RNDAsm.GetNext(IPipelineContext) 方法 Learn 发现 产品文档 开发语言 主题 登录 版本 BizTalk Accelerator for RosettaNet Microsoft.Solutions.BTARN.AdminSnapin Microsoft.Solutions.BTARN.CommonTypes Microsoft.Solutions.BTARN.ConfigurationManager Microsoft.Solutions.BTARN.GlobalSchemas...
> Java => rnd.nextInt() > Clojure => (. rnd nextInt) > sugared => (.nextInt rnd) > > > What's the point of the sugared version? It's not any less to type. > It's also incomprehensible to me how it came about. In the middle one ...
3、下列代码的功能是产生4位随机数并保存,在“___”处应该填入( )。Random rnd = new Random();int randNum = rnd.nextInt(8999) 1000;String randStr = String.valueOf(randNum);___A、page.setAttribute("randStr",randStr);B、request.setAttribute("
sc 6 in next rnd (= 1st rnd of the body) 青云英语翻译 请在下面的文本框内输入文字,然后点击开始翻译按钮进行翻译,如果您看不到结果,请重新翻译! 翻译结果1翻译结果2翻译结果3翻译结果4翻译结果5 翻译结果1复制译文编辑译文朗读译文返回顶部 SC 6在接下来的RND (身体= 1 RND)...