{"Entry":{"collection":"sql","key":"drop-event-trigger","name":"DROP EVENT TRIGGER","aliases":["dropeventtrigger"],"metadata":{"aliases":["dropeventtrigger"],"changed_in":[],"changes":[{"from":"9.2","purpose_changed":false,"renamed":null,"sections":{"added":[],"changed":[],"removed":[]},"status":"added","synopsis":null,"to":"9.3"},{"from":"9.5","purpose_changed":false,"renamed":null,"sections":{"added":[],"changed":["parameters"],"removed":[]},"status":"changed","synopsis":null,"to":"9.6"},{"from":"11","purpose_changed":false,"renamed":null,"sections":{"added":[],"changed":["parameters"],"removed":[]},"status":"changed","synopsis":null,"to":"12"},{"from":"16","purpose_changed":false,"renamed":null,"sections":{"added":[],"changed":["parameters"],"removed":[]},"status":"changed","synopsis":null,"to":"17"},{"from":"18","purpose_changed":false,"renamed":null,"sections":{"added":[],"changed":["parameters"],"removed":[]},"status":"changed","synopsis":null,"to":"19"}],"content_hash":"f60dfe21c875d19c4532682fa99f1997ee8e8c47fb7e8ff03fbc6e79ab78354e","editorial":{},"first_version":"9.3","group":"trigger","imported_at":"2026-09-30T17:43:38.342182+08:00","last_version":"20","name":"DROP EVENT TRIGGER","object":"EVENT TRIGGER","position":6003,"present_in":["9.3","9.4","9.5","9.6","10","11","12","13","14","15","16","17","18","19","20"],"purpose":"remove an event trigger","purpose_zh":"","related":["create-event-trigger","alter-event-trigger"],"slug":"drop-event-trigger","source_rev":"a709ab85","synopsis":"DROP EVENT TRIGGER [ IF EXISTS ] name [ CASCADE | RESTRICT ]","verb":"DROP"}},"Definition":{"Collection":"sql","Key":"drop-event-trigger","SourceDatabase":"center","Version":"18","SourceTable":"sqlcmd","SourceKey":"drop-event-trigger","SourceRevision":"a709ab85","Facts":{"anchor":"SQL-DROPEVENTTRIGGER","file":"sql-dropeventtrigger.html","lang":"en","name":"DROP EVENT TRIGGER","purpose":"remove an event trigger","purpose_zh":"","related":["create-event-trigger","alter-event-trigger"],"sections":[{"html":"\u003cp\u003e\u003ccode class=\"command\"\u003eDROP EVENT TRIGGER\u003c/code\u003e removes an existing event trigger. To execute this command, the current user must be the owner of the event trigger.\u003c/p\u003e","key":"description","title":"Description"},{"html":"\u003cdiv class=\"variablelist\"\u003e\u003cdl class=\"variablelist\"\u003e\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"literal\"\u003eIF EXISTS\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\u003cdd\u003e\u003cp\u003eDo not throw an error if the event trigger does not exist. A notice is issued in this case.\u003c/p\u003e\u003c/dd\u003e\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003cem class=\"replaceable\"\u003e\u003ccode\u003ename\u003c/code\u003e\u003c/em\u003e\u003c/span\u003e\u003c/dt\u003e\u003cdd\u003e\u003cp\u003eThe name of the event trigger to remove.\u003c/p\u003e\u003c/dd\u003e\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"literal\"\u003eCASCADE\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\u003cdd\u003e\u003cp\u003eAutomatically drop objects that depend on the trigger, and in turn all objects that depend on those objects (see \u003ca href=\"/docs/18/ddl-depend.html\" title=\"5.15. Dependency Tracking\"\u003eSection 5.15\u003c/a\u003e).\u003c/p\u003e\u003c/dd\u003e\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"literal\"\u003eRESTRICT\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\u003cdd\u003e\u003cp\u003eRefuse to drop the trigger if any objects depend on it. This is the default.\u003c/p\u003e\u003c/dd\u003e\u003c/dl\u003e\u003c/div\u003e","key":"parameters","title":"Parameters"},{"html":"\u003cp\u003eDestroy the trigger \u003ccode class=\"literal\"\u003esnitch\u003c/code\u003e:\u003c/p\u003e\u003cpre class=\"programlisting\"\u003eDROP EVENT TRIGGER snitch;\n\u003c/pre\u003e","key":"examples","title":"Examples"},{"html":"\u003cp\u003eThere is no \u003ccode class=\"command\"\u003eDROP EVENT TRIGGER\u003c/code\u003e statement in the SQL standard.\u003c/p\u003e","key":"compatibility","title":"Compatibility"},{"html":"\u003cspan class=\"simplelist\"\u003e\u003ca href=\"/wiki/sql/create-event-trigger/?v=18\" title=\"CREATE EVENT TRIGGER\"\u003e\u003cspan class=\"refentrytitle\"\u003eCREATE EVENT TRIGGER\u003c/span\u003e\u003c/a\u003e, \u003ca href=\"/wiki/sql/alter-event-trigger/?v=18\" title=\"ALTER EVENT TRIGGER\"\u003e\u003cspan class=\"refentrytitle\"\u003eALTER EVENT TRIGGER\u003c/span\u003e\u003c/a\u003e\u003c/span\u003e","key":"see_also","title":"See Also"}],"sections_same_as":"","slug":"18","synopsis_html":"DROP EVENT TRIGGER [ IF EXISTS ] \u003cem class=\"replaceable\"\u003e\u003ccode\u003ename\u003c/code\u003e\u003c/em\u003e [ CASCADE | RESTRICT ]","synopsis_text":"DROP EVENT TRIGGER [ IF EXISTS ] name [ CASCADE | RESTRICT ]"},"ManualEvidence":{},"MeasuredEvidence":{}},"Text":{"Collection":"sql","Key":"drop-event-trigger","SourceDatabase":"pgweb","Version":"18","Locale":"zh-Hans","Title":"DROP EVENT TRIGGER","Summary":"移除一个事件触发器","BodyHTML":"\u003cpre\u003eDROP EVENT TRIGGER [ IF EXISTS ] name [ CASCADE | RESTRICT ]\u003c/pre\u003e\u003csection\u003e\u003ch2\u003e描述\u003c/h2\u003e\u003cp\u003e\u003ccode\u003eDROP EVENT TRIGGER\u003c/code\u003e移除一个现有的事件触发器。要执行此命令，当前用户必须是该事件触发器的所有者。\u003c/p\u003e\u003c/section\u003e\u003csection\u003e\u003ch2\u003e参数\u003c/h2\u003e\u003cdiv\u003e\u003cdl\u003e\u003cdt\u003e\u003cspan\u003e\u003ccode\u003eIF EXISTS\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\u003cdd\u003e\u003cp\u003e如果该事件触发器不存在，则不要抛出错误。这种情况下会发出一个提示。\u003c/p\u003e\u003c/dd\u003e\u003cdt\u003e\u003cspan\u003e\u003cem\u003e\u003ccode\u003ename\u003c/code\u003e\u003c/em\u003e\u003c/span\u003e\u003c/dt\u003e\u003cdd\u003e\u003cp\u003e要移除的事件触发器名称。\u003c/p\u003e\u003c/dd\u003e\u003cdt\u003e\u003cspan\u003e\u003ccode\u003eCASCADE\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\u003cdd\u003e\u003cp\u003e自动删除依赖于该触发器的对象，以及进一步依赖于这些对象的所有对象（参见\u003ca href=\"/docs/18/ddl-depend.html\" rel=\"nofollow\"\u003e第 5.15 节\u003c/a\u003e）。\u003c/p\u003e\u003c/dd\u003e\u003cdt\u003e\u003cspan\u003e\u003ccode\u003eRESTRICT\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\u003cdd\u003e\u003cp\u003e如果有任何对象依赖于该触发器，则拒绝删除它。这是默认值。\u003c/p\u003e\u003c/dd\u003e\u003c/dl\u003e\u003c/div\u003e\u003c/section\u003e\u003csection\u003e\u003ch2\u003e示例\u003c/h2\u003e\u003cp\u003e销毁事件触发器\u003ccode\u003esnitch\u003c/code\u003e：\u003c/p\u003e\u003cpre\u003eDROP EVENT TRIGGER snitch;\n\u003c/pre\u003e\u003c/section\u003e\u003csection\u003e\u003ch2\u003e兼容性\u003c/h2\u003e\u003cp\u003eSQL 标准中没有\u003ccode\u003eDROP EVENT TRIGGER\u003c/code\u003e语句。\u003c/p\u003e\u003c/section\u003e\u003csection\u003e\u003ch2\u003e另见\u003c/h2\u003e\u003cspan\u003e\u003ca href=\"/wiki/sql/create-event-trigger/?v=18\" title=\"CREATE EVENT TRIGGER\" rel=\"nofollow\"\u003e\u003cspan\u003eCREATE EVENT TRIGGER\u003c/span\u003e\u003c/a\u003e, \u003ca href=\"/wiki/sql/alter-event-trigger/?v=18\" title=\"ALTER EVENT TRIGGER\" rel=\"nofollow\"\u003e\u003cspan\u003eALTER EVENT TRIGGER\u003c/span\u003e\u003c/a\u003e\u003c/span\u003e\u003c/section\u003e","SourceRevision":"1b5ca64c","ContentHash":"117cb2eb97cde7727195a8f421ceeeee95eba65d0269254390880b6a59e1bd69","Payload":{"purpose_zh":"移除一个事件触发器","sections":[{"html":"\u003cp\u003e\u003ccode class=\"command\"\u003eDROP EVENT TRIGGER\u003c/code\u003e移除一个现有的事件触发器。要执行此命令，当前用户必须是该事件触发器的所有者。\u003c/p\u003e","key":"description","title":"描述"},{"html":"\u003cdiv class=\"variablelist\"\u003e\u003cdl class=\"variablelist\"\u003e\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"literal\"\u003eIF EXISTS\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\u003cdd\u003e\u003cp\u003e如果该事件触发器不存在，则不要抛出错误。这种情况下会发出一个提示。\u003c/p\u003e\u003c/dd\u003e\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003cem class=\"replaceable\"\u003e\u003ccode\u003ename\u003c/code\u003e\u003c/em\u003e\u003c/span\u003e\u003c/dt\u003e\u003cdd\u003e\u003cp\u003e要移除的事件触发器名称。\u003c/p\u003e\u003c/dd\u003e\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"literal\"\u003eCASCADE\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\u003cdd\u003e\u003cp\u003e自动删除依赖于该触发器的对象，以及进一步依赖于这些对象的所有对象（参见\u003ca href=\"/docs/18/ddl-depend.html\" title=\"5.15. 依赖跟踪\"\u003e第 5.15 节\u003c/a\u003e）。\u003c/p\u003e\u003c/dd\u003e\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"literal\"\u003eRESTRICT\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\u003cdd\u003e\u003cp\u003e如果有任何对象依赖于该触发器，则拒绝删除它。这是默认值。\u003c/p\u003e\u003c/dd\u003e\u003c/dl\u003e\u003c/div\u003e","key":"parameters","title":"参数"},{"html":"\u003cp\u003e销毁事件触发器\u003ccode class=\"literal\"\u003esnitch\u003c/code\u003e：\u003c/p\u003e\u003cpre class=\"programlisting\"\u003eDROP EVENT TRIGGER snitch;\n\u003c/pre\u003e","key":"examples","title":"示例"},{"html":"\u003cp\u003eSQL 标准中没有\u003ccode class=\"command\"\u003eDROP EVENT TRIGGER\u003c/code\u003e语句。\u003c/p\u003e","key":"compatibility","title":"兼容性"},{"html":"\u003cspan class=\"simplelist\"\u003e\u003ca href=\"/wiki/sql/create-event-trigger/?v=18\" title=\"CREATE EVENT TRIGGER\"\u003e\u003cspan class=\"refentrytitle\"\u003eCREATE EVENT TRIGGER\u003c/span\u003e\u003c/a\u003e, \u003ca href=\"/wiki/sql/alter-event-trigger/?v=18\" title=\"ALTER EVENT TRIGGER\"\u003e\u003cspan class=\"refentrytitle\"\u003eALTER EVENT TRIGGER\u003c/span\u003e\u003c/a\u003e\u003c/span\u003e","key":"see_also","title":"另见"}],"sections_same_as":"","synopsis_html":"DROP EVENT TRIGGER [ IF EXISTS ] \u003cem class=\"replaceable\"\u003e\u003ccode\u003ename\u003c/code\u003e\u003c/em\u003e [ CASCADE | RESTRICT ]","synopsis_text":"DROP EVENT TRIGGER [ IF EXISTS ] name [ CASCADE | RESTRICT ]"}},"RequestedLocale":"zh-Hans","Fallback":false,"Versions":["10","11","12","13","14","15","16","17","18","19","20","9.3","9.4","9.5","9.6"],"Locales":["en","zh-Hans"],"Signatures":null,"Spellings":null,"SQLState":null,"Evidence":null}