{"id":2997,"date":"2016-11-30T20:35:34","date_gmt":"2016-11-30T12:35:34","guid":{"rendered":"http:\/\/ixyzero.com\/blog\/?p=2997"},"modified":"2016-11-30T20:35:34","modified_gmt":"2016-11-30T12:35:34","slug":"collectmysql%e7%9a%84%e5%ad%98%e5%82%a8%e8%bf%87%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/2997.html","title":{"rendered":"[collect]MySQL\u7684\u5b58\u50a8\u8fc7\u7a0b"},"content":{"rendered":"<p>=Start=<\/p>\n<h4>\u7f18\u7531\uff1a<\/h4>\n<p>\u5de5\u4f5c\u9700\u8981\uff0c\u5b66\u4e60\u9700\u8981<\/p>\n<h4>\u6b63\u6587\uff1a<\/h4>\n<p>MySQL \u5b58\u50a8\u8fc7\u7a0b(Stored Procedure) \u662f\u901a\u8fc7\u7ed9\u5b9a\u7684\u8bed\u6cd5\u683c\u5f0f\u7f16\u5199\u81ea\u5b9a\u4e49\u7684\u6570\u636e\u5e93API\uff0c<strong>\u5305\u542b\u4e00\u7cfb\u5217SQL\u8bed\u53e5\u7684\u96c6\u5408\uff0c\u5b8c\u6210\u4e00\u4e2a\u590d\u6742\u7684\u529f\u80fd<\/strong>\u3002\u8fd9\u4e2aAPI\u53ef\u4ee5\u53cd\u590d\u4f7f\u7528\uff0c\u6267\u884c\u6548\u7387\u4e5f\u5f88\u9ad8\u3002<\/p>\n<p>\u529f\u80fd\u4e0a\u6709\u70b9\u50cffunction\uff0c\u4f46\u662f\u548cfunction\u8fd8\u662f\u6709\u4e9b\u533a\u522b\u3002<\/p>\n<p>\u5b58\u50a8\u8fc7\u7a0b\u7684\u53c2\u6570\u6709\u4e09\u79cd\u7c7b\u578b\uff1a<\/p>\n<ul>\n<li><code>IN<\/code>\uff1a\u8f93\u5165\u53c2\u6570\u3002\u5728\u8c03\u7528\u5b58\u50a8\u8fc7\u7a0b\u65f6\u6307\u5b9a\uff0c\u9ed8\u8ba4\u672a\u6307\u5b9a\u7c7b\u578b\u65f6\u5219\u662f\u6b64\u7c7b\u578b\u3002<\/li>\n<li><strong><code>OUT<\/code>\uff1a\u8f93\u51fa\u53c2\u6570\u3002\u5728\u5b58\u50a8\u8fc7\u7a0b\u91cc\u53ef\u4ee5\u88ab\u6539\u53d8\uff0c\u5e76\u4e14\u53ef\u8fd4\u56de<\/strong>\u3002<\/li>\n<li><code>INOUT<\/code>\uff1a\u8f93\u5165\u8f93\u51fa\u53c2\u6570\u3002IN \u548c OUT \u7684\u7ed3\u5408\u3002<\/li>\n<\/ul>\n<p>(\u5173\u4e8eIN\u548cOUT\u7684\u533a\u522b\uff0c\u4e2a\u4eba\u7406\u89e3IN\u6bd4\u8f83\u50cfC\/C++\u4e2d\u7684\u503c\u4f20\u9012\uff0cOUT\u50cf\u5f15\u7528\u4f20\u9012)<\/p>\n<p>\u4e00\u4e2a\u57fa\u672c\u7684\u683c\u5f0f\uff1a<\/p>\n<div class=\"highlight\">\n<pre class=\"lang text\"><code class=\"language-text\">DELIMITER \/\/\nDROP PROCEDURE IF EXISTS usp_demo;\nCREATE PROCEDURE usp_demo(IN param1 INT,...)\nBEGIN\n    -- Do SQL Operation\nEND \/\/\nDELIMITER ;\n<\/code><\/pre>\n<\/div>\n<p>\u4e00\u822c\u4f1a\u5728\u5b58\u50a8\u8fc7\u7a0b\u5f00\u59cb\u65f6\u5c06\u7ed3\u675f\u7b26\u6539\u4e3a\u5176\u5b83\u5b57\u7b26\uff0c\u5728\u7ed3\u675f\u65f6\u6539\u56de\u539f\u6765\u7684\u3002<\/p>\n<p>\u539f\u56e0\uff1a<\/p>\n<blockquote><p>Because we want to pass the stored procedure to the server as a whole rather than letting mysql tool to interpret each statement at a time. Following the\u00a0<code>END<\/code>\u00a0keyword, we use the delimiter\u00a0<code>\/\/<\/code>\u00a0to indicate the end of the stored procedure.<\/p><\/blockquote>\n<p>(\u6458\u81ea\uff1a<a class=\"external-link\" href=\"http:\/\/www.mysqltutorial.org\/getting-started-with-mysql-stored-procedures.aspx\" target=\"_blank\" rel=\"nofollow\">Getting Started with MySQL Stored Procedures<\/a>)<\/p>\n<p>\u7136\u540e\u5b9a\u4e49\u5b58\u50a8\u8fc7\u7a0b, \u53c2\u6570\u53ef\u6709\u53ef\u65e0, \u5c31\u548c\u7f16\u7801\u5199\u51fd\u6570\u4e00\u6837, \u5b9a\u4e49\u51e0\u4e2a\u53c2\u6570, \u8c03\u7528\u65f6\u5c31\u5199\u51e0\u4e2a\u53c2\u6570.<\/p>\n<p>\u7136\u540e\u4ee5<code>BEGIN<\/code>\u5f00\u59cb, \u4ee5<code>END<\/code>\u7ed3\u675f. \u91cc\u9762\u662f\u4e00\u7cfb\u5217\u7684SQL\u8bed\u53e5, \u5e76\u4e14\u8fd8\u63d0\u4f9b\u4e86\u7ed3\u6784\u63a7\u5236\u8bed\u53e5, \u6bd4\u5982\u00a0<code>IF<\/code>,\u00a0<code>WHILE<\/code>,\u00a0<code>CASE<\/code>\u7b49\u7b49, \u53ef\u4ee5\u5b8c\u6210\u590d\u6742\u7684\u64cd\u4f5c.<\/p>\n<p>\u53e6\u5916, \u5b9a\u4e49\u5b58\u50a8\u8fc7\u7a0b, \u4ee5<code>usp_<\/code>\u524d\u7f00\u662f\u533a\u522b\u7cfb\u7edf\u5b58\u50a8\u8fc7\u7a0b\u548c\u7528\u6237\u81ea\u5b9a\u4e49\u5b58\u50a8\u8fc7\u7a0b\u7684<a class=\"external-link\" href=\"http:\/\/www.oschina.net\/translate\/create-and-call-mysql-stored-procedure-database-sql-example-tutorial\" target=\"_blank\" rel=\"nofollow\">\u6700\u4f73\u5b9e\u8df5<\/a>.<\/p>\n<p><strong>\u5b9a\u4e49\u5b58\u50a8\u8fc7\u7a0b\u540e, \u901a\u8fc7<code>CALL<\/code>\u547d\u4ee4\u8c03\u7528<\/strong>:<\/p>\n<div class=\"highlight\">\n<pre class=\"lang text\"><code class=\"language-text\">CALL &lt;usp_name&gt;;\n<\/code><\/pre>\n<\/div>\n<p><code>DECLARE<\/code>\u00a0\u58f0\u660e\u5c40\u90e8\u53d8\u91cf:<\/p>\n<div class=\"highlight\">\n<pre class=\"lang text\"><code class=\"language-text\">DECLARE var_name,[var_name...] data_type DEFAULT default_value\n<\/code><\/pre>\n<\/div>\n<p>\u5982:<\/p>\n<div class=\"highlight\">\n<pre class=\"lang text\"><code class=\"language-text\">DECLARE a, b, c INT DEFAULT 5;\n<\/code><\/pre>\n<\/div>\n<p><code>SET<\/code>\u00a0\u5bf9\u5df2\u58f0\u660e\u7684\u53d8\u91cf\u8d4b\u503c\u6216\u91cd\u65b0\u8d4b\u503c.<\/p>\n<p><code>SELECT<\/code>\u00a0\u663e\u793a\u53d8\u91cf;\u00a0<code>SELECT var into out_var<\/code>\u00a0\u5c06\u53d8\u91cf\u503c\u5199\u5165OUT\u53c2\u6570<\/p>\n<p>\u5982:<\/p>\n<div class=\"highlight\">\n<pre class=\"lang text\"><code class=\"language-text\">DELIMITER \/\/\nDROP PROCEDURE IF EXISTS usp_demo;\nCREATE PROCEDURE usp_demo(OUT num INT)\nBEGIN\n    DECLARE myvar INT;\n    SET myvar = (SELECT id FROM users LIMIT 1);\n    SELECT myvar into num;\nEND \/\/\nDELIMITER ;\n\nmysql&gt; set @a=1;\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql&gt; call usp_demo(@a);\nQuery OK, 1 row affected (0.00 sec)\n\nmysql&gt; select @a;\n+------+\n| @a   |\n+------+\n| 3938 |\n+------+\n1 row in set (0.00 sec)\n<\/code><\/pre>\n<\/div>\n<p>\u7b80\u5355\u4f8b\u5b50:<\/p>\n<div class=\"highlight\">\n<pre class=\"lang text\"><code class=\"language-text\">DELIMITER \/\/\nDROP PROCEDURE IF EXISTS usp_demo;\nCREATE PROCEDURE usp_demo(IN num INT)\nBEGIN\n    select num;\n    set num = 100;\n    select num;\nEND \/\/\nDELIMITER ;\n\nmysql&gt; CALL usp_demo(1);\n+------+\n| num  |\n+------+\n|    1 |\n+------+\n1 row in set (0.00 sec)\n\n+------+\n| num  |\n+------+\n|  100 |\n+------+\n1 row in set (0.00 sec)\n\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql&gt; select @a;\n+------+\n| @a   |\n+------+\n|  5   |\n+------+\n1 row in set (0.00 sec)\n<\/code><\/pre>\n<\/div>\n<div class=\"highlight\">\n<pre class=\"lang text\"><code class=\"language-text\">mysql&gt; set @a = 5;\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql&gt; CALL usp_demo(@a);\n+------+\n| num  |\n+------+\n|    5 |\n+------+\n1 row in set (0.00 sec)\n\n+------+\n| num  |\n+------+\n|  100 |\n+------+\n1 row in set (0.00 sec)\n\nQuery OK, 0 rows affected (0.00 sec)\n<\/code><\/pre>\n<\/div>\n<div class=\"highlight\">\n<pre class=\"lang text\"><code class=\"language-text\">DELIMITER \/\/\nDROP PROCEDURE IF EXISTS usp_demo;\nCREATE PROCEDURE usp_demo(OUT num INT)\nBEGIN\n    set num = 100;\n    select num;\nEND \/\/\nDELIMITER ;\n\nmysql&gt; set @a = 5;\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql&gt; CALL usp_demo(@a);\n+------+\n| num  |\n+------+\n|  100 |\n+------+\n1 row in set (0.00 sec)\n\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql&gt; select @a;\n+------+\n| @a   |\n+------+\n|  100 |\n+------+\n1 row in set (0.00 sec)\n<\/code><\/pre>\n<\/div>\n<p>\u5176\u5b83\u547d\u4ee4:<\/p>\n<ul>\n<li><code>SHOW PROCEDURE STATUS<\/code>\u00a0<strong>\u5217\u51fa\u6240\u6709\u5b58\u50a8\u8fc7\u7a0b<\/strong><\/li>\n<li><code>SHOW CREATE PROCEDURE &lt;sp_name&gt;<\/code>\u00a0<strong>\u67e5\u770b\u4e00\u4e2a\u5df2\u5b58\u5728\u7684\u5b58\u50a8\u8fc7\u7a0b\u7684\u4fe1\u606f<\/strong><\/li>\n<\/ul>\n<p>\u53c2\u8003:<\/p>\n<ul>\n<li><a class=\"external-link\" href=\"http:\/\/www.mysqltutorial.org\/mysql-stored-procedure-tutorial.aspx\" target=\"_blank\" rel=\"nofollow\">MySQL Stored Procedure<\/a><\/li>\n<li><a class=\"external-link\" href=\"http:\/\/code.tutsplus.com\/articles\/an-introduction-to-stored-procedures-in-mysql-5--net-17843\" target=\"_blank\" rel=\"nofollow\">An Introduction to Stored Procedures in MySQL5<\/a><\/li>\n<\/ul>\n<hr \/>\n<p><a class=\"external-link\" href=\"http:\/\/dev.mysql.com\/doc\/refman\/5.1\/en\/events.html\" target=\"_blank\" rel=\"nofollow\">\u4e8b\u4ef6(Event)<\/a>, \u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e9b\u4efb\u52a1\u8c03\u5ea6.<\/p>\n<p>\u9996\u5148\u9700\u8981\u5f00\u542f\u4e8b\u4ef6\u8c03\u5ea6\u7684\u652f\u6301:<\/p>\n<div class=\"highlight\">\n<pre class=\"lang text\"><code class=\"language-text\">SET GLOBAL event_scheduler = 1;\n<\/code><\/pre>\n<\/div>\n<p><a class=\"external-link\" href=\"http:\/\/dev.mysql.com\/doc\/refman\/5.1\/en\/create-event.html\" target=\"_blank\" rel=\"nofollow\">\u521b\u5efa\u8bed\u6cd5<\/a>:<\/p>\n<div class=\"highlight\">\n<pre class=\"lang text\"><code class=\"language-text\">CREATE EVENT [IF NOT EXISTS] &lt;event_name&gt;\nON SCHEDULE &lt;schedule&gt;\nDO\n&lt;event_body&gt;;\n<\/code><\/pre>\n<\/div>\n<p>\u5176\u5b83\u547d\u4ee4:<\/p>\n<ul>\n<li><code>SHOW EVENTS<\/code>\u00a0<strong>\u5217\u51fa\u6240\u6709\u4e8b\u4ef6<\/strong><\/li>\n<li><code>SHOW CREATE EVENT &lt;event_name&gt;<\/code>\u00a0<strong>\u67e5\u770b\u4e00\u4e2a\u5df2\u5b58\u5728\u7684\u4e8b\u4ef6\u7684\u4fe1\u606f<\/strong><\/li>\n<\/ul>\n<p>\u53c2\u8003:<\/p>\n<ul>\n<li><a class=\"external-link\" href=\"http:\/\/www.mysqltutorial.org\/mysql-triggers\/working-mysql-scheduled-event\/\" target=\"_blank\" rel=\"nofollow\">Working with MySQL Scheduled Event<\/a><\/li>\n<\/ul>\n<hr \/>\n<p>\u4e00\u4e2a\u5b58\u50a8\u8fc7\u7a0b\u914d\u5408\u4e8b\u4ef6\u7684\u4f8b\u5b50\uff1a<\/p>\n<p><strong>\u4f7f\u7528\u4e8b\u4ef6\uff0c\u6bcf\u534a\u5c0f\u65f6\u8c03\u7528\u5b58\u50a8\u8fc7\u7a0b\uff0c\u5b58\u50a8\u8fc7\u7a0b\u662f\u4e00\u4e2aWHILE\u5faa\u73af\uff0c\u4e00\u76f4\u5220\u96642\u4e2a\u5c0f\u65f6\u4e4b\u524d\u7684\u6570\u636e\uff0c\u6bcf\u6b21\u5220\u96641000\u6761\u3002<\/strong><\/p>\n<div class=\"highlight\">\n<pre class=\"lang text\"><code class=\"language-text\">-- \u5b9a\u4e49\u5b58\u50a8\u8fc7\u7a0b\nDELIMITER \/\/\nDROP PROCEDURE IF EXISTS usp_del_user;\nCREATE PROCEDURE usp_del_user(IN expire_interval INT, IN delete_per_count INT)\n-- expire_interval: the unit is hour\n-- delete_per_count: specify the count do every delete operation\nBEGIN\n    WHILE EXISTS (select 1 from users where ts &lt; DATE_SUB(NOW(), INTERVAL expire_interval HOUR)) DO\n        delete from users order by ts limit delete_per_count;\n    END WHILE;\nEND \/\/\nDELIMITER ;\n\n-- \u5b9a\u4e49\u4e8b\u4ef6, \u8c03\u7528\u5b58\u50a8\u8fc7\u7a0b\nDROP EVENT IF EXISTS del_user;\nCREATE EVENT del_user\nON SCHEDULE EVERY 30 MINUTE\nDO\nCALL usp_del_user(2, 1000)\n<\/code><\/pre>\n<\/div>\n<hr \/>\n<p>\u5728\u672c\u5730\u6d4b\u8bd5\u521b\u5efa\u5b58\u50a8\u8fc7\u7a0b\u7684\u65f6\u5019\uff0c\u9047\u5230\u8fd9\u4e2a\u62a5\u9519\uff1a<\/p>\n<blockquote><p>ERROR 1548 (HY000): Cannot load from mysql.proc. The table is probably corrupted<\/p><\/blockquote>\n<p>\u5e94\u8be5\u662fmysql\u5347\u7ea7\u540e\u6709\u4e9b\u8868\u683c\u7684\u4fe1\u606f\u9700\u8981\u76f8\u5e94\u5347\u7ea7\uff0c\u4fee\u590d\uff1a<\/p>\n<div class=\"highlight\">\n<pre class=\"lang text\"><code class=\"language-text\">sudo mysql_upgrade -uroot -p\n<\/code><\/pre>\n<\/div>\n<hr \/>\n<p>MySQL \u8f93\u51fa\u65f6\u7684<code>\\G<\/code><\/p>\n<p>\u6709\u65f6\u4f7f\u7528<code>SHOW<\/code>\u8f93\u51fa\u4e00\u4e9b\u4fe1\u606f\u8868\u683c\u65f6\uff0c\u9650\u5236\u4e8e\u5c4f\u5e55\u7684\u5bbd\u5ea6\uff0c\u8868\u683c\u4f1a\u6bd4\u8f83\u6df7\u4e71\u3002\u52a0\u4e0a<code>\\G<\/code>\u540e\u663e\u793a\u6548\u679c\u5982\uff1a<\/p>\n<div class=\"highlight\">\n<pre class=\"lang text\"><code class=\"language-text\">mysql&gt; show events\\G;\n*************************** 1. row ***************************\n                  Db: testsp\n                Name: delete_user\n             Definer: root@localhost\n           Time zone: SYSTEM\n                Type: RECURRING\n          Execute at: NULL\n      Interval value: 5\n      Interval field: SECOND\n              Starts: 2015-03-26 17:26:27\n                Ends: NULL\n              Status: ENABLED\n          Originator: 1\ncharacter_set_client: utf8\ncollation_connection: utf8_general_ci\n  Database Collation: utf8_general_ci\n1 row in set (0.00 sec)\n<\/code><\/pre>\n<\/div>\n<p>\u8fd9\u79cd\u5de6\u53f3\u7684\u7ed3\u6784\u770b\u4e0a\u53bb\u5c31\u4f1a\u6bd4\u8f83\u7f8e\u89c2\u3002<\/p>\n<p><span style=\"color: #ff0000;\"><strong>\u539f\u6587\u94fe\u63a5<\/strong><\/span>\uff1a<a class=\"external-link\" href=\"https:\/\/blog.tankywoo.com\/2015\/04\/01\/mysql-stored-procedure.html\" target=\"_blank\" rel=\"nofollow\">https:\/\/blog.tankywoo.com\/2015\/04\/01\/mysql-stored-procedure.html<\/a><\/p>\n<p>=END=<\/p>\n","protected":false},"excerpt":{"rendered":"<p>=Start= \u7f18\u7531\uff1a \u5de5\u4f5c\u9700\u8981\uff0c\u5b66\u4e60\u9700\u8981 \u6b63\u6587\uff1a MySQL \u5b58\u50a8\u8fc7\u7a0b(Stored Procedure)  [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,23],"tags":[689,16,33],"class_list":["post-2997","post","type-post","status-publish","format-standard","hentry","category-database","category-knowledgebase-2","tag-delimiter","tag-mysql","tag-stored-procedure"],"views":2622,"_links":{"self":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/2997","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/comments?post=2997"}],"version-history":[{"count":0,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/2997\/revisions"}],"wp:attachment":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/media?parent=2997"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/categories?post=2997"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/tags?post=2997"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}