{"id":60821,"date":"2024-10-13T06:05:16","date_gmt":"2024-10-12T22:05:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60821\/"},"modified":"2024-10-13T06:05:16","modified_gmt":"2024-10-12T22:05:16","slug":"db2%e6%95%b8%e6%93%9a%e5%ba%ab%e7%82%ba%e5%96%ae%e5%80%8b%e6%9c%83%e8%a9%b1%e9%8e%96%e5%ae%9a%e6%8a%80%e5%b7%a7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60821\/","title":{"rendered":"DB2\u6578\u64da\u5eab\u70ba\u55ae\u500b\u6703\u8a71\u9396\u5b9a\u6280\u5de7"},"content":{"rendered":"<h1 id=\"db2%e6%95%b8%e6%93%9a%e5%ba%ab%e7%82%ba%e5%96%ae%e5%80%8b%e6%9c%83%e8%a9%b1%e9%8e%96%e5%ae%9a%e6%8a%80%e5%b7%a7-rweMZiANlr\">DB2\u6578\u64da\u5eab\u70ba\u55ae\u500b\u6703\u8a71\u9396\u5b9a\u6280\u5de7<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u9396\u5b9a\u662f\u4e00\u500b\u81f3\u95dc\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u591a\u7528\u6236\u74b0\u5883\u6642\u3002IBM\u7684DB2\u6578\u64da\u5eab\u7cfb\u7d71\u63d0\u4f9b\u4e86\u591a\u7a2e\u9396\u5b9a\u6a5f\u5236\uff0c\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u672c\u6587\u5c07\u63a2\u8a0eDB2\u6578\u64da\u5eab\u4e2d\u70ba\u55ae\u500b\u6703\u8a71\u9396\u5b9a\u7684\u6280\u5de7\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u66f4\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u5eab\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e9%8e%96%e5%ae%9a%ef%bc%9f-rweMZiANlr\">\u4ec0\u9ebc\u662f\u9396\u5b9a\uff1f<\/h2>\n<p>\u9396\u5b9a\u662f\u6307\u5728\u6578\u64da\u5eab\u4e2d\u5c0d\u7279\u5b9a\u8cc7\u6e90\uff08\u5982\u884c\u3001\u8868\u6216\u9801\u9762\uff09\u65bd\u52a0\u7684\u63a7\u5236\uff0c\u4ee5\u9632\u6b62\u5176\u4ed6\u6703\u8a71\u540c\u6642\u8a2a\u554f\u8a72\u8cc7\u6e90\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u767c\u751f\u3002DB2\u652f\u6301\u591a\u7a2e\u9396\u5b9a\u985e\u578b\uff0c\u5305\u62ec\u5171\u4eab\u9396\u548c\u6392\u4ed6\u9396\u3002<\/p>\n<h2 id=\"db2%e4%b8%ad%e7%9a%84%e9%8e%96%e5%ae%9a%e9%a1%9e%e5%9e%8b-rweMZiANlr\">DB2\u4e2d\u7684\u9396\u5b9a\u985e\u578b<\/h2>\n<ul>\n<li><strong>\u5171\u4eab\u9396\uff08S Lock\uff09<\/strong>: \u5141\u8a31\u591a\u500b\u6703\u8a71\u540c\u6642\u8b80\u53d6\u6578\u64da\uff0c\u4f46\u4e0d\u5141\u8a31\u4fee\u6539\u3002<\/li>\n<li><strong>\u6392\u4ed6\u9396\uff08X Lock\uff09<\/strong>: \u53ea\u5141\u8a31\u4e00\u500b\u6703\u8a71\u5c0d\u6578\u64da\u9032\u884c\u8b80\u53d6\u548c\u4fee\u6539\uff0c\u5176\u4ed6\u6703\u8a71\u7121\u6cd5\u8a2a\u554f\u3002<\/li>\n<li><strong>\u610f\u5411\u9396\uff08Intent Lock\uff09<\/strong>: \u7528\u65bc\u6307\u793a\u4e00\u500b\u6703\u8a71\u5e0c\u671b\u5728\u66f4\u4f4e\u5c64\u7d1a\u4e0a\u7372\u5f97\u9396\u5b9a\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%96%ae%e5%80%8b%e6%9c%83%e8%a9%b1%e9%8e%96%e5%ae%9a%e7%9a%84%e6%8a%80%e5%b7%a7-rweMZiANlr\">\u55ae\u500b\u6703\u8a71\u9396\u5b9a\u7684\u6280\u5de7<\/h2>\n<p>\u5728DB2\u4e2d\uff0c\u70ba\u4e86\u63d0\u9ad8\u6027\u80fd\u548c\u6578\u64da\u4e00\u81f4\u6027\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6280\u5de7\u4f86\u5be6\u73fe\u55ae\u500b\u6703\u8a71\u9396\u5b9a\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8%e9%a1%af%e5%bc%8f%e9%8e%96%e5%ae%9a-rweMZiANlr\">1. \u4f7f\u7528\u986f\u5f0f\u9396\u5b9a<\/h3>\n<p>\u986f\u5f0f\u9396\u5b9a\u5141\u8a31\u958b\u767c\u8005\u5728\u9700\u8981\u6642\u624b\u52d5\u63a7\u5236\u9396\u5b9a\u3002\u9019\u53ef\u4ee5\u901a\u904eSQL\u8a9e\u53e5\u4f86\u5be6\u73fe\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre><code>LOCK TABLE my_table IN EXCLUSIVE MODE;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u5c0d\u8868\u201cmy_table\u201d\u65bd\u52a0\u6392\u4ed6\u9396\uff0c\u78ba\u4fdd\u5176\u4ed6\u6703\u8a71\u7121\u6cd5\u8a2a\u554f\u8a72\u8868\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e8%a1%8c%e7%b4%9a%e9%8e%96%e5%ae%9a-rweMZiANlr\">2. \u4f7f\u7528\u884c\u7d1a\u9396\u5b9a<\/h3>\n<p>\u884c\u7d1a\u9396\u5b9a\u53ef\u4ee5\u6e1b\u5c11\u9396\u5b9a\u7bc4\u570d\uff0c\u5f9e\u800c\u63d0\u9ad8\u4e26\u767c\u6027\u80fd\u3002DB2\u652f\u6301\u884c\u7d1a\u9396\u5b9a\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u65b9\u5f0f\u5be6\u73fe\uff1a<\/p>\n<pre><code>UPDATE my_table SET column1 = 'value' WHERE id = 1;<\/code><\/pre>\n<p>\u5728\u57f7\u884c\u66f4\u65b0\u64cd\u4f5c\u6642\uff0cDB2\u6703\u81ea\u52d5\u5c0d\u7b26\u5408\u689d\u4ef6\u7684\u884c\u65bd\u52a0\u6392\u4ed6\u9396\u3002<\/p>\n<h3 id=\"3-%e8%a8%ad%e7%bd%ae%e9%8e%96%e5%ae%9a%e8%b6%85%e6%99%82-rweMZiANlr\">3. \u8a2d\u7f6e\u9396\u5b9a\u8d85\u6642<\/h3>\n<p>\u70ba\u4e86\u907f\u514d\u6b7b\u9396\u60c5\u6cc1\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8a2d\u7f6e\u9396\u5b9a\u8d85\u6642\u3002\u9019\u6a23\uff0c\u5982\u679c\u4e00\u500b\u6703\u8a71\u5728\u6307\u5b9a\u6642\u9593\u5167\u7121\u6cd5\u7372\u5f97\u9396\u5b9a\uff0c\u5247\u6703\u81ea\u52d5\u653e\u68c4\u64cd\u4f5c\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u8a2d\u7f6e\u8d85\u6642\uff1a<\/p>\n<pre><code>SET LOCK TIMEOUT 10;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u9396\u5b9a\u8d85\u6642\u8a2d\u7f6e\u70ba10\u79d2\u3002<\/p>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8%e4%ba%8b%e5%8b%99%e6%8e%a7%e5%88%b6-rweMZiANlr\">4. \u4f7f\u7528\u4e8b\u52d9\u63a7\u5236<\/h3>\n<p>\u5728DB2\u4e2d\uff0c\u4f7f\u7528\u4e8b\u52d9\u63a7\u5236\u53ef\u4ee5\u6709\u6548\u7ba1\u7406\u9396\u5b9a\u3002\u958b\u767c\u8005\u61c9\u8a72\u5728\u4e8b\u52d9\u958b\u59cb\u6642\u7372\u53d6\u9396\u5b9a\uff0c\u4e26\u5728\u4e8b\u52d9\u7d50\u675f\u6642\u91cb\u653e\u9396\u5b9a\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>BEGIN;\nUPDATE my_table SET column1 = 'value' WHERE id = 1;\nCOMMIT;<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5728\u4e8b\u52d9\u5b8c\u6210\u4e4b\u524d\uff0c\u9396\u5b9a\u4e0d\u6703\u88ab\u91cb\u653e\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-rweMZiANlr\">\u7d50\u8ad6<\/h2>\n<p>\u5728DB2\u6578\u64da\u5eab\u4e2d\uff0c\u70ba\u55ae\u500b\u6703\u8a71\u9396\u5b9a\u7684\u6280\u5de7\u5c0d\u65bc\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u63d0\u9ad8\u6027\u80fd\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u4f7f\u7528\u986f\u5f0f\u9396\u5b9a\u3001\u884c\u7d1a\u9396\u5b9a\u3001\u8a2d\u7f6e\u9396\u5b9a\u8d85\u6642\u4ee5\u53ca\u6709\u6548\u7684\u4e8b\u52d9\u63a7\u5236\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u66f4\u597d\u5730\u7ba1\u7406\u6578\u64da\u5eab\u64cd\u4f5c\uff0c\u907f\u514d\u6f5b\u5728\u7684\u554f\u984c\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bcDB2\u6578\u64da\u5eab\u7684\u9396\u5b9a\u6a5f\u5236\u6709\u9032\u4e00\u6b65\u7684\u8208\u8da3\uff0c\u6216\u5e0c\u671b\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u548c<code><a href=\"https:\/\/server.hk\">\u96f2\u4f3a\u670d\u5668<\/a><\/code>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8a73\u7d30\u8cc7\u6599\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22DB2\u6578\u64da\u5eab\u4e2d\u7684\u55ae\u500b\u6703\u8a71\u9396\u5b9a\u6280\u5de7\uff0c\u63d0\u5347\u6027\u80fd\u8207\u6578\u64da\u4e00\u81f4\u6027\uff0c\u78ba\u4fdd\u9ad8\u6548\u7684\u6578\u64da\u7ba1\u7406\u8207\u64cd\u4f5c\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-60821","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60821","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=60821"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60821\/revisions"}],"predecessor-version":[{"id":60822,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60821\/revisions\/60822"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60821"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60821"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60821"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}