{"id":454,"date":"2017-10-27T14:20:29","date_gmt":"2017-10-27T06:20:29","guid":{"rendered":"https:\/\/blog.jsjs.org\/?p=454"},"modified":"2017-10-27T14:20:29","modified_gmt":"2017-10-27T06:20:29","slug":"mycat%ef%bc%9a%e5%bc%80%e6%ba%90%e5%88%86%e5%b8%83%e5%bc%8f%e6%95%b0%e6%8d%ae%e5%ba%93%e4%b8%ad%e9%97%b4%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/blog.jsjs.org\/?p=454","title":{"rendered":"MyCat\uff1a\u5f00\u6e90\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u4e2d\u95f4\u4ef6"},"content":{"rendered":"<div class=\"summary\"><iframe loading=\"lazy\" src=\"http:\/\/hits.sinajs.cn\/A1\/weiboshare.html?url=http%3A%2F%2Fwww.csdn.net%2Farticle%2F2015-07-16%2F2825228&amp;type=3&amp;count=&amp;appkey=&amp;title=MyCat%E6%88%AA%E8%87%B3%E5%88%B02015%E5%B9%B44%E6%9C%88%EF%BC%8C%E4%BF%9D%E5%AE%88%E4%BC%B0%E8%AE%A1%E5%B7%B2%E7%BB%8F%E6%9C%89%E8%B6%85%E8%BF%8760%E4%B8%AA%E9%A1%B9%E7%9B%AE%E5%9C%A8%E4%BD%BF%E7%94%A8%EF%BC%8C%E4%B8%BB%E8%A6%81%E5%BA%94%E7%94%A8%E5%9C%A8%E7%94%B5%E4%BF%A1%E9%A2%86%E5%9F%9F%E3%80%81%E4%BA%92%E8%81%94%E7%BD%91%E9%A1%B9%E7%9B%AE%EF%BC%8C%E5%A4%A7%E9%83%A8%E5%88%86%E6%98%AF%E4%BA%A4%E6%98%93%E5%92%8C%E7%AE%A1%E7%90%86%E7%B3%BB%E7%BB%9F%EF%BC%8C%E5%B0%91%E9%87%8F%E6%98%AF%E4%BF%A1%E6%81%AF%E7%B3%BB%E7%BB%9F%E3%80%82%E6%AF%94%E8%BE%83%E5%A4%A7%E7%9A%84%E7%B3%BB%E7%BB%9F%E4%B8%AD%EF%BC%8C%E6%95%B0%E6%8D%AE%E8%A7%84%E6%A8%A1%E5%8D%95%E8%A1%A8%E5%8D%95%E6%9C%8830%E4%BA%BF%E3%80%82%E6%9C%AC%E6%96%87%E5%B8%A6%E4%BD%A0%E5%85%A8%E9%9D%A2%E4%BA%86%E8%A7%A3MyCat%E3%80%82&amp;pic=&amp;ralateUid=&amp;language=zh_cn&amp;rnd=1509084654806\" width=\"22\" height=\"16\" frameborder=\"0\" scrolling=\"no\" data-mce-fragment=\"1\"><\/iframe><strong>\u6458\u8981\uff1a<\/strong>MyCat\u622a\u81f3\u52302015\u5e744\u6708\uff0c\u4fdd\u5b88\u4f30\u8ba1\u5df2\u7ecf\u6709\u8d85\u8fc760\u4e2a\u9879\u76ee\u5728\u4f7f\u7528\uff0c\u4e3b\u8981\u5e94\u7528\u5728\u7535\u4fe1\u9886\u57df\u3001\u4e92\u8054\u7f51\u9879\u76ee\uff0c\u5927\u90e8\u5206\u662f\u4ea4\u6613\u548c\u7ba1\u7406\u7cfb\u7edf\uff0c\u5c11\u91cf\u662f\u4fe1\u606f\u7cfb\u7edf\u3002\u6bd4\u8f83\u5927\u7684\u7cfb\u7edf\u4e2d\uff0c\u6570\u636e\u89c4\u6a21\u5355\u8868\u5355\u670830\u4ebf\u3002\u672c\u6587\u5e26\u4f60\u5168\u9762\u4e86\u89e3MyCat\u3002<\/div>\n<div class=\"con news_content\">\n<p><b>\u4e3a\u4ec0\u4e48\u9700\u8981<\/b><b>MyCat<\/b><b>\uff1f<\/b><\/p>\n<p>\u867d\u7136\u4e91\u8ba1\u7b97\u65f6\u4ee3\uff0c\u4f20\u7edf\u6570\u636e\u5e93\u5b58\u5728\u7740\u5148\u5929\u6027\u7684\u5f0a\u7aef\uff0c\u4f46\u662fNoSQL\u6570\u636e\u5e93\u53c8\u65e0\u6cd5\u5c06\u5176\u66ff\u4ee3\u3002\u5982\u679c\u4f20\u7edf\u6570\u636e\u6613\u4e8e\u6269\u5c55\uff0c\u53ef\u5207\u5206\uff0c\u5c31\u53ef\u4ee5\u907f\u514d\u5355\u673a\uff08\u5355\u5e93\uff09\u7684\u6027\u80fd\u7f3a\u9677\u3002<\/p>\n<p>MyCat\u7684\u76ee\u6807\u5c31\u662f\uff1a\u4f4e\u6210\u672c\u5730\u5c06\u73b0\u6709\u7684\u5355\u673a\u6570\u636e\u5e93\u548c\u5e94\u7528\u5e73\u6ed1\u8fc1\u79fb\u5230\u201c\u4e91\u201d\u7aef\uff0c\u89e3\u51b3\u6570\u636e\u5b58\u50a8\u548c\u4e1a\u52a1\u89c4\u6a21\u8fc5\u901f\u589e\u957f\u60c5\u51b5\u4e0b\u7684\u6570\u636e\u74f6\u9888\u95ee\u9898\u30022014\u5e74MyCat\u9996\u6b21\u5728\u4e0a\u6d77\u7684\u300a\u4e2d\u534e\u67b6\u6784\u5e08\u300b\u5927\u4f1a\u4e0a\u5bf9\u5916\u5ba3\u8bb2\u5f15\u53d1\u56f4\u89c2\uff0c\u66f4\u591a\u7684\u4eba\u53c2\u4e0e\u8fdb\u6765\uff0c\u968f\u540e\u8d8a\u6765\u8d8a\u591a\u7684\u9879\u76ee\u91c7\u7528\u4e86MyCat\u3002<\/p>\n<p>MyCat\u622a\u81f3\u52302015\u5e744\u6708\uff0c\u4fdd\u5b88\u4f30\u8ba1\u5df2\u7ecf\u6709\u8d85\u8fc760\u4e2a\u9879\u76ee\u5728\u4f7f\u7528\uff0c\u4e3b\u8981\u5e94\u7528\u5728\u7535\u4fe1\u9886\u57df\u3001\u4e92\u8054\u7f51\u9879\u76ee\uff0c\u5927\u90e8\u5206\u662f\u4ea4\u6613\u548c\u7ba1\u7406\u7cfb\u7edf\uff0c\u5c11\u91cf\u662f\u4fe1\u606f\u7cfb\u7edf\u3002\u6bd4\u8f83\u5927\u7684\u7cfb\u7edf\u4e2d\uff0c\u6570\u636e\u89c4\u6a21\u5355\u8868\u5355\u670830\u4ebf\u3002<\/p>\n<p><b>MyCat<\/b><b>\u662f\u4ec0\u4e48\uff1f<\/b><\/p>\n<p>\u4ece\u5b9a\u4e49\u548c\u5206\u7c7b\u6765\u770b\uff0c\u5b83\u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u7cfb\u7edf\uff0c\u662f\u4e00\u4e2a\u5b9e\u73b0\u4e86MySQL\u534f\u8bae\u7684\u670d\u52a1\u5668\uff0c\u524d\u7aef\u7528\u6237\u53ef\u4ee5\u628a\u5b83\u770b\u4f5c\u662f\u4e00\u4e2a\u6570\u636e\u5e93\u4ee3\u7406\uff0c\u7528MySQL\u5ba2\u6237\u7aef\u5de5\u5177\u548c\u547d\u4ee4\u884c\u8bbf\u95ee\uff0c\u800c\u5176\u540e\u7aef\u53ef\u4ee5\u7528MySQL\u539f\u751f\u534f\u8bae\u4e0e\u591a\u4e2aMySQL\u670d\u52a1\u5668\u901a\u4fe1\uff0c\u4e5f\u53ef\u4ee5\u7528JDBC\u534f\u8bae\u4e0e\u5927\u591a\u6570\u4e3b\u6d41\u6570\u636e\u5e93\u670d\u52a1\u5668\u901a\u4fe1\uff0c\u5176\u6838\u5fc3\u529f\u80fd\u662f\u5206\u8868\u5206\u5e93\uff0c\u5373\u5c06\u4e00\u4e2a\u5927\u8868\u6c34\u5e73\u5206\u5272\u4e3aN\u4e2a\u5c0f\u8868\uff0c\u5b58\u50a8\u5728\u540e\u7aefMySQL\u670d\u52a1\u5668\u91cc\u6216\u8005\u5176\u4ed6\u6570\u636e\u5e93\u91cc\u3002<\/p>\n<p>MyCat\u53d1\u5c55\u5230\u76ee\u524d\u7684\u7248\u672c\uff0c\u5df2\u7ecf\u4e0d\u662f\u4e00\u4e2a\u5355\u7eaf\u7684MySQL\u4ee3\u7406\u4e86\uff0c\u5b83\u7684\u540e\u7aef\u53ef\u4ee5\u652f\u6301MySQL\u3001SQL Server\u3001Oracle\u3001DB2\u3001PostgreSQL\u7b49\u4e3b\u6d41\u6570\u636e\u5e93\uff0c\u4e5f\u652f\u6301MongoDB\u8fd9\u79cd\u65b0\u578bNoSQL\u65b9\u5f0f\u7684\u5b58\u50a8\uff0c\u672a\u6765\u8fd8\u4f1a\u652f\u6301\u66f4\u591a\u7c7b\u578b\u7684\u5b58\u50a8\u3002\u800c\u5728\u6700\u7ec8\u7528\u6237\u770b\u6765\uff0c\u65e0\u8bba\u662f\u90a3\u79cd\u5b58\u50a8\u65b9\u5f0f\uff0c\u5728MyCat\u91cc\uff0c\u90fd\u662f\u4e00\u4e2a\u4f20\u7edf\u7684\u6570\u636e\u5e93\u8868\uff0c\u652f\u6301\u6807\u51c6\u7684SQL\u8bed\u53e5\u8fdb\u884c\u6570\u636e\u7684\u64cd\u4f5c\uff0c\u8fd9\u6837\u4e00\u6765\uff0c\u5bf9\u524d\u7aef\u4e1a\u52a1\u7cfb\u7edf\u6765\u8bf4\uff0c\u53ef\u4ee5\u5927\u5e45\u964d\u4f4e\u5f00\u53d1\u96be\u5ea6\uff0c\u63d0\u5347\u5f00\u53d1\u901f\u5ea6<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/img.ptcms.csdn.net\/article\/201507\/16\/55a7545d41503_middle.jpg?_=63251\" alt=\"\" \/><\/p>\n<p>\u56fe1 MyCat\u67b6\u6784\u8bbe\u8ba1\u56fe<\/p>\n<p><b>MyCat<\/b><b>\u89e3\u51b3\u4e86\u54ea\u4e9b\u95ee\u9898<\/b><\/p>\n<p><b>1. \u8fde\u63a5\u8fc7\u591a\u95ee\u9898\uff0c\u53ef\u4ee5\u901a\u8fc7MyCat\u7edf\u4e00\u7ba1\u7406\u6240\u6709\u7684\u6570\u636e\u6e90\uff0c\u540e\u7aef\u6570\u636e\u5e93\u96c6\u7fa4\u5bf9\u524d\u7aef\u5e94\u7528\u7a0b\u5e8f\u900f\u660e\u3002<\/b>\u4f7f\u7528MyCat\u4e4b\u524d\u7cfb\u7edf\u7ed3\u6784\u5982\u56fe2\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/img.ptcms.csdn.net\/article\/201507\/16\/55a754913bdd6_middle.jpg?_=39571\" alt=\"\" \/><\/p>\n<p>\u56fe2\u00a0 MyCat\u65e9\u524d\u7cfb\u7edf\u67b6\u6784<\/p>\n<p>MyCat\u5f15\u5165\u8fde\u63a5\u590d\u7528\u89e3\u51b3\u591a\u5e94\u7528\u7ade\u4e89\u95ee\u9898\uff0c\u901a\u8fc7MyCat\u6539\u9020\u540e\uff0c\u5982\u56fe3\u6240\u793a\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/img.ptcms.csdn.net\/article\/201507\/16\/55a754be29df9_middle.jpg?_=26864\" alt=\"\" \/><\/p>\n<p>\u56fe3\u00a0 \u6539\u9020\u540e\u7684MyCat<\/p>\n<p><b>2. \u72ec\u521b\u7684ER\u5173\u7cfb\u5206\u7247\uff0c\u89e3\u51b3E-R\u5206\u7247\u96be\u5904\u7406\u95ee\u9898<\/b>\uff0c\u5b58\u5728\u5173\u8054\u5173\u7cfb\u7684\u7236\u5b50\u8868\u5728\u6570\u636e\u63d2\u5165\u7684\u8fc7\u7a0b\u4e2d\uff0c\u5b50\u8868\u4f1a\u88abMyCat\u8def\u7531\u5230\u5176\u76f8\u5173\u7236\u8868\u8bb0\u5f55\u7684\u8282\u70b9\u4e0a\uff0c\u4ece\u800c\u7236\u5b50\u8868\u7684Join\u67e5\u8be2\u53ef\u4ee5\u4e0b\u63a8\u5230\u5404\u4e2a\u6570\u636e\u5e93\u8282\u70b9\u4e0a\u5b8c\u6210\uff0c\u8fd9\u662f\u6700\u9ad8\u6548\u7684\u8de8\u8282\u70b9Join\u5904\u7406\u6280\u672f\uff0c\u4e5f\u662fMyCat\u9996\u521b\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/img.ptcms.csdn.net\/article\/201507\/16\/55a754f26c1d2_middle.jpg?_=7554\" alt=\"\" \/><\/p>\n<p>\u56fe4\u00a0 \u72ec\u521b\u7684ER\u5173\u7cfb\u5206\u7247\uff0c\u662fMyCat\u9996\u521b<\/p>\n<p><b>3. \u91c7\u7528\u5168\u5c40\u5206\u7247\u6280\u672f\uff0c\u6bcf\u4e2a\u8282\u70b9\u540c\u65f6\u5e76\u53d1\u63d2\u5165\u548c\u66f4\u65b0\u6570\u636e\uff0c\u6bcf\u4e2a\u8282\u70b9\u90fd\u53ef\u4ee5\u8bfb\u53d6\u6570\u636e<\/b>\uff0c\u63d0\u5347\u8bfb\u6027\u80fd\u7684\u540c\u65f6\uff0c\u4e5f\u89e3\u51b3\u8de8\u8282\u70b9Join\u7684\u6548\u7387\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/img.ptcms.csdn.net\/article\/201507\/16\/55a75501a2290_middle.jpg?_=28484\" alt=\"\" \/><\/p>\n<p>\u56fe5 \u91c7\u7528\u5168\u5c40\u5206\u7247\u6280\u672f<\/p>\n<p><b>4. \u901a\u8fc7\u4eba\u5de5\u667a\u80fd\u7684catlet\u652f\u6301\u8de8\u5206\u7247\u590d\u6742SQL\u5b9e\u73b0\u4ee5\u53ca\u5b58\u50a8\u8fc7\u7a0b\u652f\u6301\u7b49\u3002<\/b>\u4f7f\u7528\u65b9\u5f0f\u4e3b\u8981\u901a\u8fc7MyCat\u6ce8\u91ca\u7684\u65b9\u5f0f\u6765\u6267\u884c\uff0c\u5982\u4e0b\uff1a<\/p>\n<p>\uff081\uff09\u8de8\u5206\u7247\u8054\u5408\u67e5\u8be2\u6ce8\u89e3\u652f\u6301\uff1a<\/p>\n<pre class=\"\">\/*!MyCat:catlet=demo.catlets.ShareJoin \/ select bu. ,sg.* from base_user bu,sam_glucose sg where bu.id_=sg.user_id\uff1b<\/pre>\n<p>\u6ce8\uff1asam_glucose\u662f\u8de8\u5206\u7247\u8868\u3002<\/p>\n<p>\uff082\uff09\u5b58\u50a8\u8fc7\u7a0b\u6ce8\u89e3\u652f\u6301\uff1a<\/p>\n<pre class=\"\">\/*!MyCat: sql=select * from base_user where id_=1;*\/ CALL proc_test();<\/pre>\n<p>\u6ce8\uff1a\u76ee\u524d\u6267\u884c\u5b58\u50a8\u8fc7\u7a0b\u901a\u8fc7MyCat\u6ce8\u89e3\u7684\u65b9\u5f0f\u6267\u884c\uff0c\u6ce8\u610f\u9700\u8981\u628a\u5b58\u50a8\u8fc7\u7a0b\u4e2d\u7684sql\u5199\u5230\u6ce8\u89e3\u4e2d\u3002<\/p>\n<p>\uff083\uff09\u6279\u91cf\u63d2\u5165\u4e0eID\u81ea\u589e\u957f\u7ed3\u5408\u7684\u652f\u6301\uff1a<\/p>\n<pre class=\"\">\/*!MyCat:catlet=demo.catlets.BatchInsertSequence *\/ insert into sam_test(name_) values(\u2018t1\u2019),(\u2018t2\u2019);<\/pre>\n<p>\u6ce8\uff1a\u6b64\u65b9\u5f0f\u4e0d\u9700\u8981\u5728sql\u8bed\u53e5\u4e2d\u663e\u793a\u7684\u8bbe\u7f6e\u4e3b\u952e\u5b57\u6bb5\uff0c\u7a0b\u5e8f\u5728\u540e\u53f0\u6839\u636eprimaryKey\u914d\u7f6e\u7684\u4e3b\u952e\u5217\uff0c\u81ea\u52a8\u751f\u6210\u4e3b\u952e\u7684sequence\u503c\u5e76\u66ff\u6362\u539fsql\u4e2d\u76f8\u5173\u7684\u5217\u548c\u503c\uff1b\uff084\uff09\u83b7\u53d6\u6279\u91cfsequence\u503c\u7684\u652f\u6301\uff1a<\/p>\n<pre class=\"\">\/*!MyCat:catlet=demo.catlets.BatchGetSequence *\/SELECT MyCat_get_seq(\u2018MyCat_TEST\u2019,100);<\/pre>\n<p>\u6ce8\uff1a\u6b64\u65b9\u6cd5\u8868\u793a\u83b7\u53d6MyCat_TEST\u8868\u7684100\u4e2asequence\u503c\uff0c\u4f8b\u5982\u5f53\u524dMyCat_TEST\u8868\u7684\u6700\u5927sequence\u503c\u4e3a5000\uff0c\u5219\u901a\u8fc7\u6b64\u65b9\u5f0f\u8fd4\u56de\u7684\u662f5001\uff0c\u540c\u65f6\u66f4\u65b0\u6570\u636e\u5e93\u4e2d\u7684MyCat_TEST\u8868\u7684\u6700\u5927sequence\u503c\u4e3a5100\u3002\uff085\uff09\u66f4\u597d\u5730\u652f\u6301\u6570\u636e\u5e93\u8bfb\u5199\u5206\u79bb\u4e0e\u9ad8\u53ef\u7528\u6027\uff0cMyCat\u652f\u6301\u57fa\u4e8eMySQL\u4e3b\u4ece\u590d\u5236\u72b6\u6001\u7684\u9ad8\u7ea7\u8bfb\u5199\u5206\u79bb\u63a7\u5236\u673a\u5236\uff08\u6bd4\u5982Slave_behind_master &lt;100\u5219\u5f00\u542f\uff09\uff0c\u800c\u4e00\u65e6\u68c0\u6d4b\u5230\u4e3b\u4ece\u540c\u6b65\u51fa\u9519\u6216\u8005\u5ef6\u65f6\u8d85\u8fc7\u53d1\u5c55\uff0c\u5219\u81ea\u52a8\u6392\u9664readHost\uff0c\u9632\u6b62\u7a0b\u5e8f\u8bfb\u5230\u5f88\u4e45\u7684\u65e7\u6570\u636e\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/img.ptcms.csdn.net\/article\/201507\/16\/55a75554c262f_middle.jpg?_=37295\" alt=\"\" \/><\/p>\n<p>\u56fe6\u00a0 Mycat\u652f\u6301\u57fa\u4e8eMySQL\u4e3b\u4ece\u590d\u5236\u72b6\u6001\u7684\u9ad8\u7ea7\u8bfb\u5199\u5206\u79bb\u63a7\u5236\u673a\u5236<\/p>\n<p><b>MyCat<\/b><b>\u6280\u672f\u539f\u7406<\/b><\/p>\n<p>MyCat\u6280\u672f\u539f\u7406\u4e2d\u6700\u91cd\u8981\u7684\u4e00\u4e2a\u52a8\u8bcd\u662f\u201c\u62e6\u622a\u201d\uff0c\u5b83\u62e6\u622a\u4e86\u7528\u6237\u53d1\u9001\u8fc7\u6765\u7684SQL\u8bed\u53e5\uff0c\u9996\u5148\u5bf9SQL\u8bed\u53e5\u505a\u4e86\u4e00\u4e9b\u7279\u5b9a\u7684\u5206\u6790\uff1a\u5982\u5206\u7247\u5206\u6790\u3001\u8def\u7531\u5206\u6790\u3001\u8bfb\u5199\u5206\u79bb\u5206\u6790\u3001\u7f13\u5b58\u5206\u6790\u7b49\uff0c\u7136\u540e\u5c06\u6b64SQL\u53d1\u5f80\u540e\u7aef\u7684\u771f\u5b9e\u6570\u636e\u5e93\uff0c\u5e76\u5c06\u8fd4\u56de\u7684\u7ed3\u679c\u505a\u9002\u5f53\u7684\u5904\u7406\uff0c\u6700\u7ec8\u518d\u8fd4\u56de\u7ed9\u7528\u6237\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/img.ptcms.csdn.net\/article\/201507\/16\/55a7557f1f2d8_middle.jpg?_=13789\" alt=\"\" \/><\/p>\n<p>\u56fe7\u00a0 Orders\u88ab\u5206\u4e3a\u4e09\u4e2a\u5206\u7247datanode<\/p>\n<p>\u5982\u56fe7\u6240\u793a\uff0cOrders\u8868\u88ab\u5206\u4e3a\u4e09\u4e2a\u5206\u7247datanode\uff08\u7b80\u79f0dn)\uff0c\u8fd9\u4e09\u4e2a\u5206\u7247\u662f\u5206\u5e03\u5728\u4e24\u53f0MySQL Server\u4e0a(DataHost)\uff0c\u5373datanode=database@datahost\u65b9\u5f0f\uff0c\u56e0\u6b64\u4f60\u53ef\u4ee5\u7528\u4e00\u53f0\u5230N\u53f0\u670d\u52a1\u5668\u6765\u5206\u7247\uff0c\u5206\u7247\u89c4\u5219\u4e3a\uff08sharding rule)\u5178\u578b\u7684\u5b57\u7b26\u4e32\u679a\u4e3e\u5206\u7247\u89c4\u5219\uff0c\u4e00\u4e2a\u89c4\u5219\u7684\u5b9a\u4e49\u662f\u5206\u7247\u5b57\u6bb5\uff08sharding column)+\u5206\u7247\u51fd\u6570(rule function)\uff0c\u8fd9\u91cc\u7684\u5206\u7247\u5b57\u6bb5\u4e3aprov\u800c\u5206\u7247\u51fd\u6570\u4e3a\u5b57\u7b26\u4e32\u679a\u4e3e\u65b9\u5f0f\u3002\u5f53MyCat\u6536\u5230\u4e00\u4e2aSQL\u65f6\uff0c\u4f1a\u5148\u89e3\u6790\u8fd9\u4e2aSQL\uff0c\u67e5\u627e\u6d89\u53ca\u5230\u7684\u8868\uff0c\u7136\u540e\u770b\u6b64\u8868\u7684\u5b9a\u4e49\uff0c\u5982\u679c\u6709\u5206\u7247\u89c4\u5219\uff0c\u5219\u83b7\u53d6\u5230SQL\u91cc\u5206\u7247\u5b57\u6bb5\u7684\u503c\uff0c\u5e76\u5339\u914d\u5206\u7247\u51fd\u6570\uff0c\u5f97\u5230\u8be5SQL\u5bf9\u5e94\u7684\u5206\u7247\u5217\u8868\uff0c\u7136\u540e\u5c06SQL\u53d1\u5f80\u8fd9\u4e9b\u5206\u7247\u53bb\u6267\u884c\uff0c\u6700\u540e\u6536\u96c6\u548c\u5904\u7406\u6240\u6709\u5206\u7247\u8fd4\u56de\u7684\u7ed3\u679c\u6570\u636e\uff0c\u5e76\u8f93\u51fa\u5230\u5ba2\u6237\u7aef\u3002\u4ee5select * from Orders where prov=?\u8bed\u53e5\u4e3a\u4f8b\uff0c\u67e5\u5230prov=wuhan\uff0c\u6309\u7167\u5206\u7247\u51fd\u6570\uff0cwuhan\u8fd4\u56dedn1\uff0c\u4e8e\u662fSQL\u5c31\u53d1\u7ed9\u4e86MySQL1\uff0c\u53bb\u53d6DB1\u4e0a\u7684\u67e5\u8be2\u7ed3\u679c\uff0c\u5e76\u8fd4\u56de\u7ed9\u7528\u6237\u3002\u5982\u679c\u4e0a\u8ff0SQL\u6539\u4e3aselect * from Orders where prov in (\u2018wuhan\u2019,\u2018beijing\u2019)\uff0c\u90a3\u4e48\uff0cSQL\u5c31\u4f1a\u53d1\u7ed9MySQL1\u4e0eMySQL2\u53bb\u6267\u884c\uff0c\u7136\u540e\u7ed3\u679c\u96c6\u5408\u5e76\u540e\u8f93\u51fa\u7ed9\u7528\u6237\u3002\u4f46\u901a\u5e38\u4e1a\u52a1\u4e2d\u6211\u4eec\u7684SQL\u4f1a\u6709Order By\u4ee5\u53caLimit\u7ffb\u9875\u8bed\u6cd5\uff0c\u6b64\u65f6\u5c31\u6d89\u53ca\u5230\u7ed3\u679c\u96c6\u5728MyCat\u7aef\u7684\u4e8c\u6b21\u5904\u7406\uff0c\u8fd9\u90e8\u5206\u7684\u4ee3\u7801\u4e5f\u6bd4\u8f83\u590d\u6742\uff0c\u800c\u6700\u590d\u6742\u7684\u5219\u5c5e\u4e24\u4e2a\u8868\u7684Jion\u95ee\u9898\uff0c\u4e3a\u6b64\uff0cMyCat\u63d0\u51fa\u4e86\u521b\u65b0\u6027\u7684ER\u5206\u7247\u3001\u5168\u5c40\u8868\u3001HBT\uff08Human Brain Tech)\u4eba\u5de5\u667a\u80fd\u7684Catlet\u7b49\u3002<\/p>\n<p><b>MyCat<\/b><b>\u4e0b\u4e00\u6b65\u89c4\u5212<\/b><\/p>\n<p>\u5f3a\u5316\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u4e2d\u95f4\u4ef6\u7684\u9762\u7684\u529f\u80fd\uff0c\u4f7f\u4e4b\u5177\u5907\u4e30\u5bcc\u7684\u63d2\u4ef6\u3001\u5f3a\u5927\u7684\u6570\u636e\u5e93\u667a\u80fd\u4f18\u5316\u529f\u80fd\u3001\u5168\u9762\u7684\u7cfb\u7edf\u76d1\u63a7\u80fd\u529b\u3001\u4ee5\u53ca\u65b9\u4fbf\u7684\u6570\u636e\u8fd0\u7ef4\u5de5\u5177\uff0c\u5b9e\u73b0\u5728\u7ebf\u6570\u636e\u6269\u5bb9\u3001\u8fc1\u79fb\u7b49\u9ad8\u7ea7\u529f\u80fd\u3002<\/p>\n<p>\u8fdb\u4e00\u6b65\u633a\u8fdb\u5927\u6570\u636e\u8ba1\u7b97\u9886\u57df\uff0c\u6df1\u5ea6\u7ed3\u5408Spark Stream\u548cStorm\u7b49\u5206\u5e03\u5f0f\u5b9e\u65f6\u6d41\u5f15\u64ce\uff0c\u80fd\u591f\u5b8c\u6210\u5feb\u901f\u7684\u5de8\u8868\u5173\u8054\u3001\u6392\u5e8f\u3001\u5206\u7ec4\u805a\u5408\u7b49OLAP\u65b9\u5411\u7684\u80fd\u529b\uff0c\u5e76\u96c6\u6210\u4e00\u4e9b\u70ed\u95e8\u5e38\u7528\u7684\u5b9e\u65f6\u5206\u6790\u7b97\u6cd5\uff0c\u8ba9\u5de5\u7a0b\u5e08\u4ee5\u53caDBA\u4eec\u66f4\u5bb9\u6613\u7528MyCat\u5b9e\u73b0\u4e00\u4e9b\u9ad8\u7ea7\u6570\u636e\u5206\u6790\u5904\u7406\u529f\u80fd\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/img.ptcms.csdn.net\/article\/201507\/16\/55a755acb49da_middle.jpg?_=59623\" alt=\"\" \/><b>\u4f5c\u8005\uff1a<\/b>\u738b\u91d1\u5251<\/p>\n<p><b>\u7b80\u4ecb\uff1a<\/b><a href=\"http:\/\/blog.csdn.net\/dreamcode\" target=\"_blank\" rel=\"noopener\">CSDN\u535a\u5ba2\u8ba4\u8bc1\u4e13\u5bb6<\/a>\uff0c\u5f00\u6e90\u6570\u636e\u5e93\u4e2d\u95f4\u4ef6Mycat\u6838\u5fc3\u5f00\u53d1\u6210\u5458\u3002\u4ece\u4e8b\u8f6f\u4ef6\u5de5\u4f5c10\u5e74\u3002\u73b0\u5728\u5929\u72ee\u96c6\u56e2\u62c5\u4efb\u9ad8\u7ea7DBA\u5de5\u7a0b\u5e08\uff0c\u8d1f\u8d23\u516c\u53f8\u7535\u5b50\u5546\u52a1\u7f51\u7ad9\u6570\u636e\u5e93\u8bbe\u8ba1\u4e0e\u4f18\u5316\u3001\u6570\u636e\u5e93\u67b6\u6784\u89c4\u5212\u53ca\u90e8\u7f72\u89c4\u8303\u5236\u5b9a\u3001\u6838\u5fc3\u5e94\u7528\u7684\u8f6f\u4ef6\u8bbe\u8ba1\u4e0e\u5f00\u53d1\u7b49\u5de5\u4f5c\u3002<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u6458\u8981\uff1aMyCat\u622a\u81f3\u52302015\u5e744\u6708\uff0c\u4fdd\u5b88\u4f30\u8ba1\u5df2\u7ecf\u6709\u8d85\u8fc760\u4e2a\u9879\u76ee\u5728\u4f7f\u7528\uff0c\u4e3b\u8981\u5e94\u7528\u5728\u7535\u4fe1\u9886\u57df\u3001\u4e92\u8054\u7f51\u9879\u76ee\uff0c\u5927\u90e8\u5206\u662f\u4ea4\u6613\u548c\u7ba1\u7406\u7cfb\u7edf\uff0c\u5c11\u91cf\u662f\u4fe1\u606f\u7cfb\u7edf\u3002\u6bd4\u8f83\u5927\u7684\u7cfb\u7edf\u4e2d\uff0c\u6570\u636e\u89c4\u6a21\u5355\u8868\u5355\u670830\u4ebf\u3002\u672c\u6587\u5e26\u4f60\u5168\u9762\u4e86\u89e3MyCat\u3002 \u4e3a\u4ec0\u4e48\u9700\u8981MyCat\uff1f \u867d\u7136\u4e91\u8ba1\u7b97\u65f6\u4ee3\uff0c\u4f20\u7edf\u6570\u636e\u5e93\u5b58\u5728\u7740\u5148\u5929\u6027\u7684\u5f0a\u7aef\uff0c\u4f46\u662fNoSQL\u6570\u636e\u5e93\u53c8\u65e0\u6cd5\u5c06\u5176\u66ff\u4ee3\u3002\u5982\u679c\u4f20\u7edf\u6570\u636e\u6613\u4e8e\u6269\u5c55\uff0c\u53ef\u5207\u5206\uff0c\u5c31\u53ef\u4ee5\u907f\u514d\u5355\u673a\uff08\u5355\u5e93\uff09\u7684\u6027\u80fd\u7f3a\u9677\u3002 MyCat\u7684\u76ee\u6807\u5c31\u662f\uff1a\u4f4e\u6210\u672c\u5730\u5c06\u73b0\u6709\u7684\u5355\u673a\u6570\u636e\u5e93\u548c\u5e94\u7528\u5e73\u6ed1\u8fc1\u79fb\u5230\u201c\u4e91\u201d\u7aef\uff0c\u89e3\u51b3\u6570\u636e\u5b58\u50a8\u548c\u4e1a\u52a1\u89c4\u6a21\u8fc5\u901f\u589e\u957f\u60c5\u51b5\u4e0b\u7684\u6570\u636e\u74f6\u9888\u95ee\u9898\u30022014\u5e74MyCat\u9996\u6b21\u5728\u4e0a\u6d77\u7684\u300a\u4e2d\u534e\u67b6\u6784\u5e08\u300b\u5927\u4f1a\u4e0a\u5bf9\u5916\u5ba3\u8bb2\u5f15\u53d1\u56f4\u89c2\uff0c\u66f4\u591a\u7684\u4eba\u53c2\u4e0e\u8fdb\u6765\uff0c\u968f\u540e\u8d8a\u6765\u8d8a\u591a\u7684\u9879\u76ee\u91c7\u7528\u4e86MyCat\u3002 MyCat\u622a\u81f3\u52302015\u5e744\u6708\uff0c\u4fdd\u5b88\u4f30\u8ba1\u5df2\u7ecf\u6709\u8d85\u8fc760\u4e2a\u9879\u76ee\u5728\u4f7f\u7528\uff0c\u4e3b\u8981\u5e94\u7528\u5728\u7535\u4fe1\u9886\u57df\u3001\u4e92\u8054\u7f51\u9879\u76ee\uff0c\u5927\u90e8\u5206\u662f\u4ea4\u6613\u548c\u7ba1\u7406\u7cfb\u7edf\uff0c\u5c11\u91cf\u662f\u4fe1\u606f\u7cfb\u7edf\u3002\u6bd4\u8f83\u5927\u7684\u7cfb\u7edf\u4e2d\uff0c\u6570\u636e\u89c4\u6a21\u5355\u8868\u5355\u670830\u4ebf\u3002 MyCat\u662f\u4ec0\u4e48\uff1f 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MyCat\u53d1\u5c55\u5230\u76ee\u524d\u7684\u7248\u672c\uff0c\u5df2\u7ecf\u4e0d\u662f\u4e00\u4e2a\u5355\u7eaf\u7684MySQL\u4ee3\u7406\u4e86\uff0c\u5b83\u7684\u540e\u7aef\u53ef\u4ee5\u652f\u6301MySQL\u3001SQL Server\u3001Oracle\u3001DB2\u3001PostgreSQL\u7b49\u4e3b\u6d41\u6570\u636e\u5e93\uff0c\u4e5f\u652f\u6301MongoDB\u8fd9\u79cd\u65b0\u578bNoSQL\u65b9\u5f0f\u7684\u5b58\u50a8\uff0c\u672a\u6765\u8fd8\u4f1a\u652f\u6301\u66f4\u591a\u7c7b\u578b\u7684\u5b58\u50a8\u3002\u800c\u5728\u6700\u7ec8\u7528\u6237\u770b\u6765\uff0c\u65e0\u8bba\u662f\u90a3\u79cd\u5b58\u50a8\u65b9\u5f0f\uff0c\u5728MyCat\u91cc\uff0c\u90fd\u662f\u4e00\u4e2a\u4f20\u7edf\u7684\u6570\u636e\u5e93\u8868\uff0c\u652f\u6301\u6807\u51c6\u7684SQL\u8bed\u53e5\u8fdb\u884c\u6570\u636e\u7684\u64cd\u4f5c\uff0c\u8fd9\u6837\u4e00\u6765\uff0c\u5bf9\u524d\u7aef\u4e1a\u52a1\u7cfb\u7edf\u6765\u8bf4\uff0c\u53ef\u4ee5\u5927\u5e45\u964d\u4f4e\u5f00\u53d1\u96be\u5ea6\uff0c\u63d0\u5347\u5f00\u53d1\u901f\u5ea6 \u56fe1 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