{"id":223,"date":"2024-06-18T11:15:09","date_gmt":"2024-06-18T03:15:09","guid":{"rendered":"http:\/\/zhaoyanqi.cn\/?p=223"},"modified":"2024-06-18T11:15:10","modified_gmt":"2024-06-18T03:15:10","slug":"mysql%e8%a7%a6%e5%8f%91%e5%99%a8","status":"publish","type":"post","link":"https:\/\/zhaoyanqi.cn\/?p=223","title":{"rendered":"mysql\u89e6\u53d1\u5668"},"content":{"rendered":"\n

\u89e6\u53d1\u5668\u6982\u5ff5<\/h3>\n\n\n\n

\u4f7f\u7528\u89e6\u53d1\u5668\u53ef\u4ee5\u5b9a\u5236\u7528\u6237\u5bf9\u8868\u8fdb\u884c\u3010\u589e\u3001\u5220\u3001\u6539\u3011\u64cd\u4f5c\u65f6\u524d\u540e\u7684\u884c\u4e3a\uff0c\u6ce8\u610f\uff1a\u6ca1\u6709\u67e5\u8be2\u3002<\/p>\n\n\n\n

\u89e6\u53d1\u5668\u76f8\u5173\u547d\u4ee4<\/h3>\n\n\n\n

\u4e00 \u521b\u5efa\u89e6\u53d1\u5668<\/h4>\n\n\n\n
# \u63d2\u5165\u524d\nCREATE TRIGGER tri_before_insert_tb1 BEFORE INSERT ON tb1 FOR EACH ROW\nBEGIN\n    ...\nEND\n\n# \u63d2\u5165\u540e\nCREATE TRIGGER tri_after_insert_tb1 AFTER INSERT ON tb1 FOR EACH ROW\nBEGIN\n    ...\nEND\n\n# \u5220\u9664\u524d\nCREATE TRIGGER tri_before_delete_tb1 BEFORE DELETE ON tb1 FOR EACH ROW\nBEGIN\n    ...\nEND\n\n# \u5220\u9664\u540e\nCREATE TRIGGER tri_after_delete_tb1 AFTER DELETE ON tb1 FOR EACH ROW\nBEGIN\n    ...\nEND\n\n# \u66f4\u65b0\u524d\nCREATE TRIGGER tri_before_update_tb1 BEFORE UPDATE ON tb1 FOR EACH ROW\nBEGIN\n    ...\nEND\n\n# \u66f4\u65b0\u540e\nCREATE TRIGGER tri_after_update_tb1 AFTER UPDATE ON tb1 FOR EACH ROW\nBEGIN\n    ...\nEND<\/code><\/pre>\n\n\n\n
\u4e8c \u4f7f\u7528\u89e6\u53d1\u5668\u7684\u4f8b\u5b50<\/h4>\n\n\n\n
\u51c6\u5907\u8868<\/h5>\n\n\n\n
CREATE TABLE cmd (\n    id INT PRIMARY KEY AUTO_INCREMENT,\n    USER CHAR (32),\n    priv CHAR (10),\n    cmd CHAR (64),\n    sub_time DATETIME, -- \u63d0\u4ea4\u65f6\u95f4\n    success ENUM ('yes', 'no') -- 0\u4ee3\u8868\u6267\u884c\u5931\u8d25\n);\n\nCREATE TABLE errlog (\n    id INT PRIMARY KEY AUTO_INCREMENT,\n    err_cmd CHAR (64),\n    err_time DATETIME\n);<\/code><\/pre>\n\n\n\n
\u521b\u5efa\u89e6\u53d1\u5668<\/h5>\n\n\n\n
DELIMITER \/\/\nCREATE TRIGGER tri_after_insert_cmd AFTER INSERT ON cmd FOR EACH ROW\nBEGIN\n    IF NEW.success = 'no' THEN -- \u7b49\u503c\u5224\u65ad\u53ea\u6709\u4e00\u4e2a\u7b49\u53f7\n        INSERT INTO errlog(err_cmd, err_time) VALUES(NEW.cmd, NEW.sub_time); -- \u5fc5\u987b\u52a0\u5206\u53f7\n    END IF; -- \u5fc5\u987b\u52a0\u5206\u53f7\nEND\/\/\nDELIMITER ;<\/code><\/pre>\n\n\n\n
\u7279\u522b\u8bf4\u660e<\/strong>\uff1aNEW\u8868\u793a\u5373\u5c06\u63d2\u5165\u7684\u6570\u636e\u884c\uff0cOLD\u8868\u793a\u5373\u5c06\u5220\u9664\u7684\u6570\u636e\u884c\u3002<\/p>\n\n\n\n
\u6d4b\u8bd5\u89e6\u53d1\u5668<\/h5>\n\n\n\n
# \u5f80\u8868cmd\u4e2d\u63d2\u5165\u8bb0\u5f55\uff0c\u89e6\u53d1\u89e6\u53d1\u5668\uff0c\u6839\u636eIF\u7684\u6761\u4ef6\u51b3\u5b9a\u662f\u5426\u63d2\u5165\u9519\u8bef\u65e5\u5fd7\nINSERT INTO cmd (USER, priv, cmd, sub_time, success) VALUES\n('egon','0755','ls -l \/etc',NOW(),'yes'),\n('egon','0755','cat \/etc\/passwd',NOW(),'no'),\n('egon','0755','useradd xxx',NOW(),'no'),\n('egon','0755','ps aux',NOW(),'yes');\n\n# \u67e5\u8be2\u9519\u8bef\u65e5\u5fd7\uff0c\u53d1\u73b0\u6709\u4e24\u6761\nmysql> SELECT * FROM errlog;\n+----+-----------------+---------------------+\n| id | err_cmd         | err_time            |\n+----+-----------------+---------------------+\n|  1 | cat \/etc\/passwd | 2017-09-14 22:18:48 |\n|  2 | useradd xxx     | 2017-09-14 22:18:48 |\n+----+-----------------+---------------------+\n2 rows in set (0.00 sec)<\/code><\/pre>\n\n\n\n
\u4e09 \u5220\u9664\u89e6\u53d1\u5668<\/h4>\n\n\n\n
DROP TRIGGER tri_after_insert_cmd;<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u89e6\u53d1\u5668\u6982\u5ff5 \u4f7f\u7528\u89e6\u53d1\u5668\u53ef\u4ee5\u5b9a\u5236\u7528\u6237\u5bf9\u8868\u8fdb\u884c\u3010\u589e\u3001\u5220\u3001\u6539\u3011\u64cd\u4f5c\u65f6\u524d\u540e\u7684\u884c\u4e3a\uff0c\u6ce8\u610f\uff1a\u6ca1\u6709\u67e5\u8be2\u3002 \u89e6\u53d1\u5668\u76f8\u5173\u547d\u4ee4 \u4e00 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,12],"tags":[],"class_list":["post-223","post","type-post","status-publish","format-standard","hentry","category-mysql","category-sql"],"_links":{"self":[{"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=\/wp\/v2\/posts\/223","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=223"}],"version-history":[{"count":1,"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=\/wp\/v2\/posts\/223\/revisions"}],"predecessor-version":[{"id":224,"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=\/wp\/v2\/posts\/223\/revisions\/224"}],"wp:attachment":[{"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=223"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=223"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=223"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}