{"id":96084,"date":"2024-10-20T06:28:16","date_gmt":"2024-10-19T22:28:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96084\/"},"modified":"2024-10-20T06:28:17","modified_gmt":"2024-10-19T22:28:17","slug":"oracle%e6%8f%90%e7%a4%ba%e8%b3%87%e6%ba%90%e6%ad%a3%e5%bf%99%ef%bc%8c%e9%9c%80%e6%8c%87%e5%ae%9anowait%e7%9a%84%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/96084\/","title":{"rendered":"Oracle\u63d0\u793a\u201c\u8cc7\u6e90\u6b63\u5fd9\uff0c\u9700\u6307\u5b9anowait\u201d\u7684\u89e3\u6c7a\u65b9\u6848"},"content":{"rendered":"<h1 id=\"oracle%e6%8f%90%e7%a4%ba%e8%b3%87%e6%ba%90%e6%ad%a3%e5%bf%99%ef%bc%8c%e9%9c%80%e6%8c%87%e5%ae%9anowait%e7%9a%84%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-PXKIZCFatH\">Oracle\u63d0\u793a\u201c\u8cc7\u6e90\u6b63\u5fd9\uff0c\u9700\u6307\u5b9anowait\u201d\u7684\u89e3\u6c7a\u65b9\u6848<\/h1>\n<p>\u5728\u4f7f\u7528Oracle\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u53ef\u80fd\u6703\u9047\u5230\u201c\u8cc7\u6e90\u6b63\u5fd9\uff0c\u9700\u6307\u5b9anowait\u201d\u7684\u63d0\u793a\u3002\u9019\u901a\u5e38\u8868\u793a\u7576\u524d\u8acb\u6c42\u7684\u8cc7\u6e90\u6b63\u5728\u88ab\u5176\u4ed6\u4e8b\u52d9\u4f54\u7528\uff0c\u5c0e\u81f4\u8acb\u6c42\u7121\u6cd5\u7acb\u5373\u5b8c\u6210\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u63a2\u8a0e\u8a72\u554f\u984c\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"%e5%95%8f%e9%a1%8c%e5%8e%9f%e5%9b%a0-PXKIZCFatH\">\u554f\u984c\u539f\u56e0<\/h2>\n<p>\u7576\u4e00\u500b\u4e8b\u52d9\u8a66\u5716\u8a2a\u554f\u4e00\u500b\u88ab\u5176\u4ed6\u4e8b\u52d9\u9396\u5b9a\u7684\u8cc7\u6e90\u6642\uff0cOracle\u6578\u64da\u5eab\u6703\u8fd4\u56de\u201c\u8cc7\u6e90\u6b63\u5fd9\uff0c\u9700\u6307\u5b9anowait\u201d\u7684\u932f\u8aa4\u3002\u9019\u7a2e\u60c5\u6cc1\u901a\u5e38\u767c\u751f\u5728\u4ee5\u4e0b\u5e7e\u7a2e\u60c5\u6cc1\u4e0b\uff1a<\/p>\n<ul>\n<li><strong>\u884c\u9396\u5b9a\uff1a<\/strong>\u7576\u4e00\u500b\u4e8b\u52d9\u6b63\u5728\u66f4\u65b0\u67d0\u4e00\u884c\u6642\uff0c\u5176\u4ed6\u4e8b\u52d9\u7121\u6cd5\u540c\u6642\u5c0d\u8a72\u884c\u9032\u884c\u64cd\u4f5c\u3002<\/li>\n<li><strong>\u8868\u9396\u5b9a\uff1a<\/strong>\u5982\u679c\u4e00\u500b\u4e8b\u52d9\u5c0d\u6574\u500b\u8868\u9032\u884c\u4e86\u9396\u5b9a\uff0c\u5176\u4ed6\u4e8b\u52d9\u5c07\u7121\u6cd5\u8a2a\u554f\u8a72\u8868\u3002<\/li>\n<li><strong>\u6b7b\u9396\uff1a<\/strong>\u7576\u5169\u500b\u6216\u591a\u500b\u4e8b\u52d9\u4e92\u76f8\u7b49\u5f85\u5c0d\u65b9\u91cb\u653e\u8cc7\u6e90\u6642\uff0c\u6703\u5c0e\u81f4\u6b7b\u9396\u60c5\u6cc1\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-PXKIZCFatH\">\u89e3\u6c7a\u65b9\u6848<\/h2>\n<p>\u70ba\u4e86\u89e3\u6c7a\u201c\u8cc7\u6e90\u6b63\u5fd9\uff0c\u9700\u6307\u5b9anowait\u201d\u7684\u554f\u984c\uff0c\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8nowait%e9%81%b8%e9%a0%85-PXKIZCFatH\">1. \u4f7f\u7528NOWAIT\u9078\u9805<\/h3>\n<p>\u5728SQL\u67e5\u8a62\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528NOWAIT\u9078\u9805\u4f86\u907f\u514d\u7b49\u5f85\u9396\u5b9a\u7684\u8cc7\u6e90\u3002\u9019\u6a23\uff0c\u5982\u679c\u8cc7\u6e90\u88ab\u9396\u5b9a\uff0cOracle\u5c07\u7acb\u5373\u8fd4\u56de\u932f\u8aa4\uff0c\u800c\u4e0d\u662f\u7b49\u5f85\u8cc7\u6e90\u91cb\u653e\u3002<\/p>\n<pre><code>SELECT * FROM your_table WHERE your_condition FOR UPDATE NOWAIT;<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u67e5\u8a62\u5c07\u5728\u8cc7\u6e90\u88ab\u9396\u5b9a\u6642\u7acb\u5373\u8fd4\u56de\u932f\u8aa4\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6839\u64da\u9700\u8981\u9032\u884c\u76f8\u61c9\u7684\u8655\u7406\u3002<\/p>\n<h3 id=\"2-%e6%aa%a2%e6%9f%a5%e9%8e%96%e5%ae%9a%e6%83%85%e6%b3%81-PXKIZCFatH\">2. \u6aa2\u67e5\u9396\u5b9a\u60c5\u6cc1<\/h3>\n<p>\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u6aa2\u67e5\u7576\u524d\u7684\u9396\u5b9a\u60c5\u6cc1\uff0c\u9019\u6709\u52a9\u65bc\u8b58\u5225\u54ea\u4e9b\u4e8b\u52d9\u6b63\u5728\u4f54\u7528\u8cc7\u6e90\uff1a<\/p>\n<pre><code>SELECT * FROM v$locked_object;<\/code><\/pre>\n<p>\u9019\u5c07\u986f\u793a\u7576\u524d\u88ab\u9396\u5b9a\u7684\u5c0d\u8c61\u53ca\u5176\u76f8\u95dc\u4fe1\u606f\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u627e\u5230\u554f\u984c\u7684\u6839\u6e90\u3002<\/p>\n<h3 id=\"3-%e5%84%aa%e5%8c%96%e4%ba%8b%e5%8b%99-PXKIZCFatH\">3. \u512a\u5316\u4e8b\u52d9<\/h3>\n<p>\u512a\u5316\u4e8b\u52d9\u7684\u8a2d\u8a08\u53ef\u4ee5\u6e1b\u5c11\u9396\u5b9a\u7684\u6301\u6709\u6642\u9593\u3002\u4f8b\u5982\uff0c\u5c07\u4e8b\u52d9\u7684\u7bc4\u570d\u7e2e\u5c0f\uff0c\u907f\u514d\u9577\u6642\u9593\u6301\u6709\u9396\u5b9a\uff0c\u9019\u6a23\u53ef\u4ee5\u964d\u4f4e\u8cc7\u6e90\u7af6\u722d\u7684\u53ef\u80fd\u6027\u3002<\/p>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8%e9%87%8d%e8%a9%a6%e6%a9%9f%e5%88%b6-PXKIZCFatH\">4. \u4f7f\u7528\u91cd\u8a66\u6a5f\u5236<\/h3>\n<p>\u5728\u61c9\u7528\u7a0b\u5e8f\u4e2d\u5be6\u73fe\u91cd\u8a66\u6a5f\u5236\uff0c\u7576\u9047\u5230\u201c\u8cc7\u6e90\u6b63\u5fd9\u201d\u7684\u932f\u8aa4\u6642\uff0c\u53ef\u4ee5\u7a0d\u5f8c\u91cd\u8a66\u8a72\u64cd\u4f5c\u3002\u9019\u6a23\u53ef\u4ee5\u63d0\u9ad8\u64cd\u4f5c\u7684\u6210\u529f\u7387\u3002<\/p>\n<pre><code>BEGIN\n    -- \u5617\u8a66\u57f7\u884c\u64cd\u4f5c\nEXCEPTION\n    WHEN OTHERS THEN\n        IF SQLCODE = -54 THEN\n            -- \u932f\u8aa4\u4ee3\u78bc -54 \u8868\u793a\u8cc7\u6e90\u6b63\u5fd9\n            -- \u5be6\u73fe\u91cd\u8a66\u908f\u8f2f\n        END IF;\nEND;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-PXKIZCFatH\">\u7e3d\u7d50<\/h2>\n<p>\u5728Oracle\u6578\u64da\u5eab\u4e2d\u9047\u5230\u201c\u8cc7\u6e90\u6b63\u5fd9\uff0c\u9700\u6307\u5b9anowait\u201d\u7684\u63d0\u793a\u6642\uff0c\u4e86\u89e3\u5176\u539f\u56e0\u53ca\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u4f7f\u7528NOWAIT\u9078\u9805\u3001\u6aa2\u67e5\u9396\u5b9a\u60c5\u6cc1\u3001\u512a\u5316\u4e8b\u52d9\u4ee5\u53ca\u5be6\u73fe\u91cd\u8a66\u6a5f\u5236\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u9019\u4e00\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u904b\u884c\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u7a69\u5b9a\u6027\u548c\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u6c7aOracle\u63d0\u793a\u201c\u8cc7\u6e90\u6b63\u5fd9\uff0c\u9700\u6307\u5b9anowait\u201d\u7684\u554f\u984c\uff0c\u63d0\u4f9b\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u8207\u6700\u4f73\u5be6\u8e10\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-96084","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96084","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=96084"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96084\/revisions"}],"predecessor-version":[{"id":96085,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96084\/revisions\/96085"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96084"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96084"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96084"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}