{"id":5379,"date":"2020-07-30T00:01:00","date_gmt":"2020-07-29T16:01:00","guid":{"rendered":"http:\/\/39.97.231.10\/?p=5379"},"modified":"2020-07-30T00:01:00","modified_gmt":"2020-07-29T16:01:00","slug":"mysql-8-0-%e6%96%b0%e7%89%b9%e6%80%a7%e5%ae%8c%e6%95%b4%e6%b1%87%e6%80%bb","status":"publish","type":"post","link":"http:\/\/www.weijing.co\/?p=5379","title":{"rendered":"MySQL 8.0 \u65b0\u7279\u6027\u5b8c\u6574\u6c47\u603b"},"content":{"rendered":"<div>\n<div>\n\u672c\u6587\u6574\u7406\u6c47\u603b\u4e86 MySQL 8.0 \u7248\u672c\u7684\u65b0\u7279\u6027\uff0c\u65b0\u529f\u80fd\uff0c\u5982\u4e0b\uff1a\n<\/div>\n<\/div>\n<div>\n<div>\n<h4>\u4e00\u3001\u529f\u80fd\u589e\u5f3a<\/h4>\n<h5>1.1 \u7cfb\u7edf\u8868\u66f4\u6362\u4e3aInnoDB\u5f15\u64ce<\/h5>\n<p>\u7cfb\u7edf\u8868\u5168\u90e8\u6362\u6210\u4e8b\u52a1\u578b\u7684innodb\u8868\uff0c\u9ed8\u8ba4\u7684MySQL\u5b9e\u4f8b\u5c06\u4e0d\u5305\u542b\u4efb\u4f55MyISAM\u8868\uff0c\u9664\u975e\u624b\u52a8\u521b\u5efaMyISAM\u8868\u3002<\/p>\n<h5>1.2 DDL\u539f\u5b50\u5316<\/h5>\n<p>InnoDB\u8868\u7684DDL\u652f\u6301\u4e8b\u52a1\u5b8c\u6574\u6027\uff0c\u8981\u4e48\u6210\u529f\u8981\u4e48\u56de\u6eda\uff0c\u5c06DDL\u64cd\u4f5c\u56de\u6eda\u65e5\u5fd7\u5199\u5165\u5230data dictionary \u6570\u636e\u5b57\u5178\u8868 mysql.innodb_ddl_log \u4e2d\u7528\u4e8e\u56de\u6eda\u64cd\u4f5c\uff0c\u8be5\u8868\u662f\u9690\u85cf\u7684\u8868\uff0c\u901a\u8fc7show tables\u65e0\u6cd5\u770b\u5230\u3002\u901a\u8fc7\u8bbe\u7f6e\u53c2\u6570\uff0c\u53ef\u5c06ddl\u64cd\u4f5c\u65e5\u5fd7\u6253\u5370\u8f93\u51fa\u5230mysql\u9519\u8bef\u65e5\u5fd7\u4e2d\u3002<br \/>\nmysql&gt; set global log_error_verbosity=3;<br \/>\nmysql&gt; set global innodb_print_ddl_logs=1;<\/p>\n<h5>1.3 CTE(Common Table Expression)<\/h5>\n<p>CTE(Common Table Expression)\u53ef\u4ee5\u8ba4\u4e3a\u662f\u6d3e\u751f\u8868(derived table)\u7684\u66ff\u4ee3\uff0c\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\uff0cCTE\u7b80\u5316\u4e86\u590d\u6742\u7684join\u67e5\u8be2\u548c\u5b50\u67e5\u8be2\uff0c\u53e6\u5916CTE\u53ef\u4ee5\u5f88\u65b9\u4fbf\u5730\u5b9e\u73b0\u9012\u5f52\u67e5\u8be2\uff0c\u63d0\u9ad8\u4e86SQL\u7684\u53ef\u8bfb\u6027\u548c\u6267\u884c\u6027\u80fd\u3002CTE\u662fANSI SQL 99\u6807\u51c6\u7684\u4e00\u90e8\u5206\uff0c\u5728MySQL 8.0.1\u7248\u672c\u88ab\u5f15\u5165\u3002<br \/>\n\u8be6\u7ec6\u5185\u5bb9\u89c1\u94fe\u63a5\uff1a<\/p>\n<ul>\n<li><a href=\\\"https:\/\/mytecdb.com\/blogDetail.php?id=75\\\">MySQL 8.0 \u65b0\u7279\u6027 CTE(Common Table Expression)<\/a><\/li>\n<li><a href=\\\"https:\/\/mytecdb.com\/blogDetail.php?id=87\\\">MySQL 8.0 CTE \u9012\u5f52\u67e5\u8be2<\/a><\/li>\n<\/ul>\n<h5>1.4 Clone\u63d2\u4ef6<\/h5>\n<p>MySQL 8.0 clone\u63d2\u4ef6\u63d0\u4f9b\u4ece\u4e00\u4e2a\u5b9e\u4f8b\u514b\u9686\u51fa\u53e6\u5916\u4e00\u4e2a\u5b9e\u4f8b\u7684\u529f\u80fd\uff0c\u514b\u9686\u529f\u80fd\u63d0\u4f9b\u4e86\u66f4\u6709\u6548\u7684\u65b9\u5f0f\u6765\u5feb\u901f\u521b\u5efaMySQL\u5b9e\u4f8b\uff0c\u642d\u5efa\u4e3b\u4ece\u590d\u5236\u548c\u7ec4\u590d\u5236\u3002<br \/>\n\u8be6\u7ec6\u5185\u5bb9\u89c1\u94fe\u63a5\uff1a<\/p>\n<ul>\n<li><a href=\\\"https:\/\/mytecdb.com\/blogDetail.php?id=59\\\">MySQL 8.0 \u514b\u9686(clone)\u63d2\u4ef6\u5feb\u901f\u642d\u5efa\u4e3b\u4ece\u590d\u5236<\/a><\/li>\n<li><a href=\\\"https:\/\/mytecdb.com\/blogDetail.php?id=61\\\">MySQL 8.0 \u514b\u9686(clone)\u63d2\u4ef6\u5feb\u901f\u6dfb\u52a0\u7ec4\u590d\u5236MGR\u8282\u70b9<\/a><\/li>\n<\/ul>\n<h5>1.5 \u76f4\u65b9\u56fe<\/h5>\n<p>\u76f4\u65b9\u56fe\u7edf\u8ba1\u4e86\u8868\u4e2d\u67d0\u4e9b\u5b57\u6bb5\u7684\u6570\u636e\u5206\u5e03\u60c5\u51b5\uff0c\u4e3a\u4f18\u5316\u9009\u62e9\u9ad8\u6548\u7684\u6267\u884c\u8ba1\u5212\u63d0\u4f9b\u53c2\u8003\uff0c\u76f4\u65b9\u56fe\u4e0e\u7d22\u5f15\u6709\u7740\u672c\u8d28\u7684\u533a\u522b\uff0c\u7ef4\u62a4\u4e00\u4e2a\u7d22\u5f15\u6709\u4ee3\u4ef7\uff0c\u6bcf\u4e00\u6b21\u7684insert\u3001update\u3001delete\u90fd\u4f1a\u9700\u8981\u66f4\u65b0\u7d22\u5f15\uff0c\u4f1a\u5bf9\u6027\u80fd\u6709\u4e00\u5b9a\u7684\u5f71\u54cd\uff0c\u800c\u76f4\u65b9\u56fe\u5219\u5c0f\u5f88\u591a\u3002<\/p>\n<h5>1.6 \u8d44\u6e90\u7ec4<\/h5>\n<p>MySQL 8.0\u65b0\u589e\u4e86\u4e00\u4e2a\u8d44\u6e90\u7ec4\u529f\u80fd\uff0c\u7528\u4e8e\u8c03\u63a7\u7ebf\u7a0b\u4f18\u5148\u7ea7\u4ee5\u53ca\u7ed1\u5b9aCPU\u6838\u3002MySQL\u7528\u6237\u9700\u8981\u6709 RESOURCE_GROUP_ADMIN\u6743\u9650\u624d\u80fd\u521b\u5efa\u3001\u4fee\u6539\u3001\u5220\u9664\u8d44\u6e90\u7ec4\u3002\u5728Linux\u73af\u5883\u4e0b\uff0cMySQL\u8fdb\u7a0b\u9700\u8981\u6709 CAP_SYS_NICE \u6743\u9650\u624d\u80fd\u4f7f\u7528\u8d44\u6e90\u7ec4\u5b8c\u6574\u529f\u80fd\u3002<\/p>\n<h5>1.7 \u89d2\u8272\u7ba1\u7406<\/h5>\n<p>\u89d2\u8272\u53ef\u4ee5\u8ba4\u4e3a\u662f\u4e00\u4e9b\u6743\u9650\u7684\u96c6\u5408\uff0c\u4e3a\u7528\u6237\u8d4b\u4e88\u7edf\u4e00\u7684\u89d2\u8272\uff0c\u6743\u9650\u7684\u4fee\u6539\u76f4\u63a5\u901a\u8fc7\u89d2\u8272\u6765\u8fdb\u884c\uff0c\u65e0\u9700\u4e3a\u6bcf\u4e2a\u7528\u6237\u5355\u72ec\u6388\u6743\u3002<\/p>\n<h5>1.8 \u4e0d\u53ef\u89c1\u7d22\u5f15<\/h5>\n<p>\u4f7f\u7528INVISIBLE\u5173\u952e\u5b57\u5728\u521b\u5efa\u8868\u6216\u8005\u8fdb\u884c\u8868\u53d8\u66f4\u4e2d\u8bbe\u7f6e\u7d22\u5f15\u662f\u5426\u53ef\u89c1\u3002\u7d22\u5f15\u4e0d\u53ef\u89c1\u53ea\u662f\u5728\u67e5\u8be2\u65f6\u4f18\u5316\u5668\u4e0d\u4f7f\u7528\u8be5\u7d22\u5f15\uff0c\u5373\u4f7f\u4f7f\u7528force index\uff0c\u4f18\u5316\u5668\u4e5f\u4e0d\u4f1a\u4f7f\u7528\u8be5\u7d22\u5f15\uff0c\u540c\u65f6\u4f18\u5316\u5668\u4e5f\u4e0d\u4f1a\u62a5\u7d22\u5f15\u4e0d\u5b58\u5728\u7684\u9519\u8bef\uff0c\u56e0\u4e3a\u7d22\u5f15\u4ecd\u7136\u771f\u5b9e\u5b58\u5728\uff0c\u5728\u5fc5\u8981\u65f6\uff0c\u4e5f\u53ef\u4ee5\u5feb\u901f\u7684\u6062\u590d\u6210\u53ef\u89c1\u3002<\/p>\n<h5>1.9 SET_VAR \u8bed\u6cd5<\/h5>\n<p>\u5728sql\u8bed\u6cd5\u4e2d\u589e\u52a0SET_VAR\u8bed\u6cd5\uff0c\u52a8\u6001\u8c03\u6574\u90e8\u5206\u53c2\u6570\uff0c\u6709\u5229\u4e8e\u63d0\u5347\u8bed\u53e5\u6027\u80fd\u3002<\/p>\n<pre>select \/*+ SET_VAR(sort_buffer_size = 16M) *\/ id from test order id ;\ninsert \/*+ SET_VAR(foreign_key_checks=OFF) *\/ into test(name) values(1);\n<\/pre>\n<h5>1.10 \u53c2\u6570\u4fee\u6539\u6301\u4e45\u5316<\/h5>\n<p>MySQL 8.0\u7248\u672c\u652f\u6301\u5728\u7ebf\u4fee\u6539\u5168\u5c40\u53c2\u6570\u5e76\u6301\u4e45\u5316\uff0c\u901a\u8fc7\u52a0\u4e0aPERSIST\u5173\u952e\u5b57\uff0c\u53ef\u4ee5\u5c06\u4fee\u6539\u7684\u53c2\u6570\u6301\u4e45\u5316\u5230\u65b0\u7684\u914d\u7f6e\u6587\u4ef6\uff08mysqld-auto.cnf\uff09\u4e2d\uff0c\u91cd\u542fMySQL\u65f6\uff0c\u53ef\u4ee5\u4ece\u8be5\u914d\u7f6e\u6587\u4ef6\u83b7\u53d6\u5230\u6700\u65b0\u7684\u914d\u7f6e\u53c2\u6570\u3002<br \/>\n\u4f8b\u5982\u6267\u884c\uff1aset PERSIST expire_logs_days=10 ;<br \/>\n\u7cfb\u7edf\u4f1a\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u751f\u6210\u4e00\u4e2a\u5305\u542bjson\u683c\u5f0f\u7684 mysqld-auto.cnf \u7684\u6587\u4ef6\uff0c\u683c\u5f0f\u5316\u540e\u5982\u4e0b\u6240\u793a\uff0c\u5f53 my.cnf \u548c mysqld-auto.cnf \u540c\u65f6\u5b58\u5728\u65f6\uff0c\u540e\u8005\u5177\u6709\u66f4\u9ad8\u4f18\u5148\u7ea7\u3002<\/p>\n<h5>1.11 innodb select for update\u8df3\u8fc7\u9501\u7b49\u5f85<\/h5>\n<p>select &#8230; for update\uff0cselect &#8230; for share(8.0\u65b0\u589e\u8bed\u6cd5) \u6dfb\u52a0 NOWAIT\u3001SKIP LOCKED\u8bed\u6cd5\uff0c\u8df3\u8fc7\u9501\u7b49\u5f85\uff0c\u6216\u8005\u8df3\u8fc7\u9501\u5b9a\u3002<br \/>\n\u57285.7\u53ca\u4e4b\u524d\u7684\u7248\u672c\uff0cselect&#8230;for update\uff0c\u5982\u679c\u83b7\u53d6\u4e0d\u5230\u9501\uff0c\u4f1a\u4e00\u76f4\u7b49\u5f85\uff0c\u76f4\u5230innodb_lock_wait_timeout\u8d85\u65f6\u3002<br \/>\n\u57288.0\u7248\u672c\uff0c\u901a\u8fc7\u6dfb\u52a0nowait\uff0cskip locked\u8bed\u6cd5\uff0c\u80fd\u591f\u7acb\u5373\u8fd4\u56de\u3002\u5982\u679c\u67e5\u8be2\u7684\u884c\u5df2\u7ecf\u52a0\u9501\uff0c\u90a3\u4e48nowait\u4f1a\u7acb\u5373\u62a5\u9519\u8fd4\u56de\uff0c\u800cskip locked\u4e5f\u4f1a\u7acb\u5373\u8fd4\u56de\uff0c\u53ea\u662f\u8fd4\u56de\u7684\u7ed3\u679c\u4e2d\u4e0d\u5305\u542b\u88ab\u9501\u5b9a\u7684\u884c\u3002<\/p>\n<h5>1.12 \u65b0\u589e\u964d\u5e8f\u7d22\u5f15<\/h5>\n<p>MySQL\u5728\u8bed\u6cd5\u4e0a\u5f88\u65e9\u5c31\u5df2\u7ecf\u652f\u6301\u964d\u5e8f\u7d22\u5f15\uff0c\u4f46\u5b9e\u9645\u4e0a\u521b\u5efa\u7684\u4ecd\u7136\u662f\u5347\u5e8f\u7d22\u5f15\uff0c\u5982\u4e0bMySQL 5.7 \u6240\u793a\uff0cc2\u5b57\u6bb5\u964d\u5e8f\uff0c\u4f46\u662f\u4eceshow create table\u770bc2\u4ecd\u7136\u662f\u5347\u5e8f\u30028.0\u53ef\u4ee5\u770b\u5230\uff0cc2\u5b57\u6bb5\u964d\u5e8f\u3002<\/p>\n<h5>1.13 group by \u4e0d\u518d\u9690\u5f0f\u6392\u5e8f<\/h5>\n<p>mysql 8.0 \u5bf9\u4e8egroup by \u5b57\u6bb5\u4e0d\u518d\u9690\u5f0f\u6392\u5e8f\uff0c\u5982\u9700\u8981\u6392\u5e8f\uff0c\u5fc5\u987b\u663e\u5f0f\u52a0\u4e0aorder by \u5b50\u53e5\u3002<\/p>\n<h5>1.14 \u81ea\u589e\u53d8\u91cf\u6301\u4e45\u5316<\/h5>\n<p>\u57288.0\u4e4b\u524d\u7684\u7248\u672c\uff0c\u81ea\u589e\u4e3b\u952eAUTO_INCREMENT\u7684\u503c\u5982\u679c\u5927\u4e8emax(primary key)+1\uff0c\u5728MySQL\u91cd\u542f\u540e\uff0c\u4f1a\u91cd\u7f6eAUTO_INCREMENT=max(primary key)+1\uff0c\u8fd9\u79cd\u73b0\u8c61\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u4f1a\u5bfc\u81f4\u4e1a\u52a1\u4e3b\u952e\u51b2\u7a81\u6216\u8005\u5176\u4ed6\u96be\u4ee5\u53d1\u73b0\u7684\u95ee\u9898\u3002\u81ea\u589e\u4e3b\u952e\u91cd\u542f\u91cd\u7f6e\u7684\u95ee\u9898\u5f88\u65e9\u5c31\u88ab\u53d1\u73b0(<a href=\\\"https:\/\/bugs.mysql.com\/bug.php?id=199\\\">https:\/\/bugs.mysql.com\/bug.php?id=199<\/a>)\uff0c\u4e00\u76f4\u52308.0\u624d\u88ab\u89e3\u51b3\uff0c8.0\u7248\u672c\u5c06\u4f1a\u5bf9AUTO_INCREMENT\u503c\u8fdb\u884c\u6301\u4e45\u5316\uff0cMySQL\u91cd\u542f\u540e\uff0c\u8be5\u503c\u5c06\u4e0d\u4f1a\u6539\u53d8\u3002<\/p>\n<h5>1.15 binlog\u65e5\u5fd7\u4e8b\u52a1\u538b\u7f29<\/h5>\n<p>MySQL 8.0.20 \u7248\u672c\u589e\u52a0\u4e86binlog\u65e5\u5fd7\u4e8b\u52a1\u538b\u7f29\u529f\u80fd\uff0c\u5c06\u4e8b\u52a1\u4fe1\u606f\u4f7f\u7528zstd\u7b97\u6cd5\u8fdb\u884c\u538b\u7f29\uff0c\u7136\u540e\u518d\u5199\u5165binlog\u65e5\u5fd7\u6587\u4ef6\uff0c\u8fd9\u79cd\u88ab\u538b\u7f29\u540e\u7684\u4e8b\u52a1\u4fe1\u606f\uff0c\u5728binlog\u4e2d\u5bf9\u5e94\u4e3a\u4e00\u4e2a\u65b0\u7684event\u7c7b\u578b\uff0c\u53eb\u505aTransaction_payload_event\u3002<br \/>\n\u8be6\u7ec6\u5185\u5bb9\u89c1\u94fe\u63a5\uff1a<br \/>\n<a href=\\\"https:\/\/mytecdb.com\/blogDetail.php?id=131\\\">MySQL 8.0 binlog\u65e5\u5fd7\u4e8b\u52a1\u538b\u7f29<\/a><\/p>\n<h5>1.16 \u5206\u533a\u8868\u6539\u8fdb<\/h5>\n<p>MySQL 8.0 \u5bf9\u4e8e\u5206\u533a\u8868\u529f\u80fd\u8fdb\u884c\u4e86\u8f83\u5927\u7684\u4fee\u6539\uff0c\u5728 8.0 \u4e4b\u524d\uff0c\u5206\u533a\u8868\u5728Server\u5c42\u5b9e\u73b0\uff0c\u652f\u6301\u591a\u79cd\u5b58\u50a8\u5f15\u64ce\uff0c\u4ece 8.0 \u7248\u672c\u5f00\u59cb\uff0c\u5206\u533a\u8868\u529f\u80fd\u79fb\u5230\u5f15\u64ce\u5c42\u5b9e\u73b0\uff0c\u76ee\u524dMySQL 8.0 \u7248\u672c\u53ea\u6709InnoDB\u5b58\u50a8\u5f15\u64ce\u652f\u6301\u5206\u533a\u8868\u3002<br \/>\n\u8be6\u7ec6\u5185\u5bb9\u89c1\u94fe\u63a5\uff1a<br \/>\n<a href=\\\"https:\/\/mytecdb.com\/blogDetail.php?id=135\\\">MySQL 8.0 \u5206\u533a\u8868\u7684\u6539\u8fdb<\/a><\/p>\n<h5>1.17 \u81ea\u52a8\u53c2\u6570\u8bbe\u7f6e<\/h5>\n<p>\u65b0\u589einnodb_dedicated_server\u53c2\u6570\uff0c\u80fd\u591f\u8ba9InnoDB\u6839\u636e\u670d\u52a1\u5668\u4e0a\u68c0\u6d4b\u5230\u7684\u5185\u5b58\u5927\u5c0f\u81ea\u52a8\u914d\u7f6einnodb_buffer_pool_size\uff0cinnodb_log_file_size\uff0cinnodb_flush_method\u4e09\u4e2a\u53c2\u6570\u3002<\/p>\n<h5>1.18 \u7a97\u53e3\u51fd\u6570<\/h5>\n<p>MySQL 8.0 \u7248\u672c\u5f00\u59cb\u652f\u6301\u7a97\u53e3\u51fd\u6570\uff0c\u4e3b\u6d41\u5173\u7cfb\u578b\u6570\u636e\u5e93\uff0c\u6bd4\u5982Oralce\uff0c PostgreSQL\u7b49\u90fd\u652f\u6301\u7a97\u53e3\u6570\u636e\u529f\u80fd\uff0c\u7a97\u53e3\u51fd\u6570\u5bf9\u4e8e\u6570\u636e\u5206\u6790\u5904\u7406\u5177\u6709\u91cd\u8981\u4f5c\u7528\u3002<br \/>\n<a href=\\\"https:\/\/mytecdb.com\/blogDetail.php?id=172\\\">MySQL 8.0 \u7a97\u53e3\u51fd\u6570(window functions)<\/a><\/p>\n<h4>\u4e8c\u3001\u6027\u80fd\u63d0\u9ad8<\/h4>\n<h5>2.1 \u57fa\u4e8e\u7ade\u4e89\u611f\u77e5\u7684\u4e8b\u52a1\u8c03\u5ea6(CATS)<\/h5>\n<p>MySQL \u5728 8.0.3 \u7248\u672c\u5f15\u5165\u4e86\u65b0\u7684\u4e8b\u52a1\u8c03\u5ea6\u7b97\u6cd5\uff0c\u57fa\u4e8e\u7ade\u4e89\u611f\u77e5\u7684\u4e8b\u52a1\u8c03\u5ea6\uff0cContention-Aware Transaction Scheduling\uff0c\u7b80\u79f0CATS\u3002\u5728CATS\u7b97\u6cd5\u4e4b\u524d\uff0cMySQL\u4f7f\u7528FIFO\u7b97\u6cd5\uff0c\u5148\u5230\u7684\u4e8b\u52a1\u5148\u83b7\u5f97\u9501\uff0c\u5982\u679c\u53d1\u751f\u9501\u7b49\u5f85\uff0c\u5219\u6309\u7167FIFO\u7b97\u6cd5\u8fdb\u884c\u6392\u961f\u3002CATS\u76f8\u6bd4FIFO\u66f4\u52a0\u590d\u6742\uff0c\u4e5f\u66f4\u52a0\u806a\u660e\uff0c\u5728\u9ad8\u8d1f\u8f7d\u3001\u9ad8\u4e89\u7528\u7684\u573a\u666f\u4e0b\uff0c\u6027\u80fd\u63d0\u5347\u663e\u8457\u3002<br \/>\n\u8be6\u7ec6\u5185\u5bb9\u89c1\u94fe\u63a5\uff1a<br \/>\n<a href=\\\"https:\/\/mytecdb.com\/blogDetail.php?id=134\\\">MySQL 8.0 \u7ade\u4e89\u611f\u77e5\u7684\u4e8b\u52a1\u8c03\u5ea6(CATS)<\/a><\/p>\n<h5>2.2 \u57fa\u4e8eWriteSet\u7684\u5e76\u884c\u590d\u5236<\/h5>\n<p>MySQL 8.0 \u7248\u672c\u5f15\u5165\u4e86\u4e00\u4e2a\u65b0\u7684\u673a\u5236 WriteSet\uff0c\u6765\u8ffd\u8e2a\u4e8b\u52a1\u4e4b\u95f4\u7684\u4f9d\u8d56\u6027\uff0c\u8fd9\u4e2a\u7279\u6027\u88ab\u7528\u4e8e\u4f18\u5316\u4ece\u5e93\u5e94\u7528binlog\u7684\u901f\u5ea6\uff0c\u5728\u4e3b\u5e93\u5e76\u53d1\u8f83\u4f4e\u7684\u573a\u666f\u4e0b\uff0c\u80fd\u591f\u663e\u8457\u63d0\u9ad8\u4ece\u5e93\u56de\u653ebinlog\u7684\u901f\u5ea6\uff0c\u57fa\u4e8eWriteSet \u7684\u5e76\u884c\u590d\u5236\u65b9\u6848\uff0c\u5f7b\u5e95\u89e3\u51b3\u4e86MySQL\u590d\u5236\u5ef6\u8fdf\u95ee\u9898\u3002<\/p>\n<h5>2.3 JSON\u7279\u6027\u589e\u5f3a<\/h5>\n<p>MySQL 8 \u5927\u5e45\u6539\u8fdb\u4e86\u5bf9 JSON \u7684\u652f\u6301\uff0c\u6dfb\u52a0\u4e86\u57fa\u4e8e\u8def\u5f84\u67e5\u8be2\u53c2\u6570\u4ece JSON \u5b57\u6bb5\u4e2d\u62bd\u53d6\u6570\u636e\u7684 JSON_EXTRACT() \u51fd\u6570\uff0c\u4ee5\u53ca\u7528\u4e8e\u5c06\u6570\u636e\u5206\u522b\u7ec4\u5408\u5230 JSON \u6570\u7ec4\u548c\u5bf9\u8c61\u4e2d\u7684 JSON_ARRAYAGG() \u548c JSON_OBJECTAGG() \u805a\u5408\u51fd\u6570\u3002<br \/>\n\u5728\u4e3b\u4ece\u590d\u5236\u4e2d\uff0c\u65b0\u589e\u53c2\u6570 binlog_row_value_options\uff0c\u63a7\u5236JSON\u6570\u636e\u7684\u4f20\u8f93\u65b9\u5f0f\uff0c\u5141\u8bb8\u5bf9\u4e8eJson\u7c7b\u578b\u90e8\u5206\u4fee\u6539\uff0c\u5728binlog\u4e2d\u53ea\u8bb0\u5f55\u4fee\u6539\u7684\u90e8\u5206\uff0c\u51cf\u5c11json\u5927\u6570\u636e\u5728\u53ea\u6709\u5c11\u91cf\u4fee\u6539\u7684\u60c5\u51b5\u4e0b\uff0c\u5bf9\u8d44\u6e90\u7684\u5360\u7528\u3002<\/p>\n<h5>2.4 \u7a7a\u95f4\u6570\u636e\u7c7b\u578b\u589e\u5f3a<\/h5>\n<p>MySQL 8 \u5927\u5e45\u6539\u8fdb\u4e86\u7a7a\u95f4\u6570\u636e\u7c7b\u578b\u548c\u51fd\u6570\uff0c\u652f\u6301\u66f4\u591a\u7684\u7a7a\u95f4\u5206\u6790\u51fd\u6570\u548c\u7a7a\u95f4\u7c7b\u578b\u5bf9\u8c61\uff0c\u7a7a\u95f4\u5206\u6790\u529f\u80fd\u548c\u6027\u80fd\u5f97\u5230\u5927\u5e45\u63d0\u5347\u3002<\/p>\n<h5>2.5. doublewrite\u6539\u8fdb<\/h5>\n<p>\u5728MySQL 8.0.20 \u7248\u672c\u4e4b\u524d\uff0cdoublewrite \u5b58\u50a8\u533a\u4f4d\u4e8e\u7cfb\u7edf\u8868\u7a7a\u95f4\uff0c\u4ece 8.0.20 \u7248\u672c\u5f00\u59cb\uff0cdoublewrite \u6709\u81ea\u5df1\u72ec\u7acb\u7684\u8868\u7a7a\u95f4\u6587\u4ef6\uff0c\u8fd9\u79cd\u53d8\u66f4\uff0c\u80fd\u591f\u964d\u4f4edoublewrite\u7684\u5199\u5165\u5ef6\u8fdf\uff0c\u589e\u52a0\u541e\u5410\u91cf\uff0c\u4e3a\u8bbe\u7f6edoublewrite\u6587\u4ef6\u7684\u5b58\u653e\u4f4d\u7f6e\u63d0\u4f9b\u4e86\u66f4\u9ad8\u7684\u7075\u6d3b\u6027\u3002<br \/>\n\u8be6\u7ec6\u5185\u5bb9\u89c1\u94fe\u63a5\uff1a<br \/>\n<a href=\\\"https:\/\/mytecdb.com\/blogDetail.php?id=132\\\">MySQL 8.0 doublewrite \u6539\u8fdb<\/a><\/p>\n<h5>2.6 hash join<\/h5>\n<p>MySQL 8.0.18 \u7248\u672c\u5f15\u5165 hash join \u529f\u80fd\uff0c\u5bf9\u4e8e\u6ca1\u6709\u8d70\u7d22\u5f15\u7684\u7b49\u503c join \u8fde\u63a5\u53ef\u4ee5\u4f7f\u7528 hash join \u8fdb\u884c\u4f18\u5316\u30028.0.20 \u7248\u672c\u5bf9 hash join \u8fdb\u884c\u4e86\u52a0\u5f3a\uff0c\u5373\u4f7f join \u8fde\u63a5\u6ca1\u6709\u4f7f\u7528\u7b49\u503c\u6761\u4ef6\u4e5f\u53ef\u4ee5\u4f7f\u7528 hash join \u4f18\u5316\uff0c\u539f\u6765\u4f7f\u7528 BNL \u7b97\u6cd5\u7684 join \u8fde\u63a5\u5c06\u5168\u90e8\u7531 hash join \u4ee3\u66ff\u3002<br \/>\n<a href=\\\"https:\/\/mytecdb.com\/blogDetail.php?id=175\\\">MySQL 8.0 hash join<\/a><\/p>\n<h4>\u4e09\u3001\u5b89\u5168\u6027\u589e\u5f3a<\/h4>\n<h5>3.1 redo log \u548c undo log\u52a0\u5bc6<\/h5>\n<p>\u589e\u52a0\u4ee5\u4e0b\u4e24\u4e2a\u53c2\u6570\uff0c\u7528\u4e8e\u63a7\u5236redo\u3001undo\u65e5\u5fd7\u7684\u52a0\u5bc6\u3002<\/p>\n<ul>\n<li>innodb_undo_log_encrypt<\/li>\n<li>innodb_undo_log_encrypt<\/li>\n<\/ul>\n<h5>3.2 \u9ed8\u8ba4\u5bc6\u7801\u8ba4\u8bc1\u63d2\u4ef6<\/h5>\n<p>MySQL 8.0.4 \u7248\u672c\u4fee\u6539\u4e86\u9ed8\u8ba4\u7684\u8eab\u4efd\u8ba4\u8bc1\u63d2\u4ef6\uff0c\u4ece\u8001\u7684mysql_native_password\u63d2\u4ef6\u53d8\u4e3a\u65b0\u7684caching_sha2_password\uff0c\u5e76\u5c06\u5176\u4f5c\u4e3a\u9ed8\u8ba4\u7684\u8eab\u4efd\u8ba4\u8bc1\u673a\u5236\uff0c\u540c\u65f6\u5ba2\u6237\u7aef\u5bf9\u5e94\u7684libmysqlclient\u4e5f\u9ed8\u8ba4\u4f7f\u7528\u65b0\u7684\u8ba4\u8bc1\u63d2\u4ef6\u3002<\/p>\n<h5>3.3 \u5bc6\u7801\u8fc7\u671f\uff0c\u5386\u53f2\u5bc6\u7801\u4f7f\u7528\u89c4\u5219<\/h5>\n<p>\u8bbe\u7f6e\u5386\u53f2\u5bc6\u7801\u68c0\u6d4b\u89c4\u5219\uff0c\u9632\u6b62\u53cd\u590d\u91cd\u7528\u65e7\u5bc6\u7801\u3002<\/p>\n<ul>\n<li>password_history<\/li>\n<li>password_reuse_interval<\/li>\n<\/ul>\n<p>\u53cc\u5bc6\u7801\u673a\u5236\uff0c\u4fee\u6539\u5bc6\u7801\u65f6\uff0c\u521b\u5efa\u65b0\u7684\u5bc6\u7801\uff0c\u540c\u65f6\u65e7\u7684\u5bc6\u7801\u4e5f\u53ef\u4ee5\u4f7f\u7528\uff0c\u4fdd\u7559\u4e00\u5b9a\u7684\u7f13\u51b2\u65f6\u95f4\u8fdb\u884c\u68c0\u67e5\u786e\u8ba4\u3002<br \/>\n\u5f53\u4fee\u6539\u4e00\u4e2a\u8d26\u6237\u5bc6\u7801\u65f6\uff0c\u9700\u8981\u53bb\u9a8c\u8bc1\u5f53\u524d\u7684\u5bc6\u7801\uff0c\u901a\u8fc7\u53c2\u6570password_require_current\u6765\u63a7\u5236\uff0c\u9ed8\u8ba4\u5173\u95ed\uff0c\u5f53\u6253\u5f00\u8be5\u9009\u9879\u65f6\uff0c\u5982\u679c\u8981\u4fee\u6539\u8d26\u6237\u5bc6\u7801\uff0c\u5fc5\u987b\u8981\u63d0\u4f9b\u5f53\u524d\u7684\u5bc6\u7801\u624d\u5141\u8bb8\u4fee\u6539\u3002\n<\/p><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u6587\u6574\u7406\u6c47\u603b\u4e86 MySQL 8.0 \u7248\u672c\u7684\u65b0\u7279\u6027\uff0c\u65b0\u529f\u80fd\uff0c\u5982\u4e0b\uff1a \u4e00\u3001\u529f\u80fd\u589e\u5f3a 1.1 \u7cfb\u7edf\u8868\u66f4\u6362\u4e3aInnoD &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"http:\/\/www.weijing.co\/?p=5379\"> <span class=\"screen-reader-text\">MySQL 8.0 \u65b0\u7279\u6027\u5b8c\u6574\u6c47\u603b<\/span> \u67e5\u770b\u5168\u6587 &raquo;<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":""},"categories":[90,88],"tags":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"mailpoet_newsletter_max":false,"woocommerce_thumbnail":false,"woocommerce_single":false,"woocommerce_gallery_thumbnail":false,"shop_catalog":false,"shop_single":false,"shop_thumbnail":false},"uagb_author_info":{"display_name":"weijing","author_link":"http:\/\/www.weijing.co\/?author=4"},"uagb_comment_info":0,"uagb_excerpt":"\u672c\u6587\u6574\u7406\u6c47\u603b\u4e86 MySQL 8.0 \u7248\u672c\u7684\u65b0\u7279\u6027\uff0c\u65b0\u529f\u80fd\uff0c\u5982\u4e0b\uff1a \u4e00\u3001\u529f\u80fd\u589e\u5f3a 1.1 \u7cfb\u7edf\u8868\u66f4\u6362\u4e3aInnoD&hellip;","_links":{"self":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/5379"}],"collection":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5379"}],"version-history":[{"count":0,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/5379\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5379"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5379"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5379"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}