{"Entry":{"collection":"sql","key":"drop-operator","name":"DROP OPERATOR","aliases":["dropoperator"],"metadata":{"aliases":["dropoperator"],"changed_in":["7.1","7.3","7.4","8.0","8.2","9.0","10","14"],"changes":[{"from":"6.4","purpose_changed":false,"renamed":null,"sections":{"added":[],"changed":["description","usage"],"removed":[]},"status":"changed","synopsis":null,"to":"6.5"},{"from":"7.0","purpose_changed":false,"renamed":{"from_file":"sql-dropoperator.htm","to_file":"sql-dropoperator.html"},"sections":{"added":[],"changed":["description","usage"],"removed":[]},"status":"changed","synopsis":{"added":["DROP OPERATOR id ( lefttype | NONE , righttype | NONE )"],"removed":["DROP OPERATOR id ( type | NONE [,...] 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]"]},"to":"14"},{"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":"e2a1f2bfe794db3952895281ff4c51d414063918ba10e39928b8e4dd2ebbe2ac","editorial":{},"first_version":"6.4","group":"type","imported_at":"2026-09-30T17:43:37.534842+08:00","last_version":"20","name":"DROP OPERATOR","object":"OPERATOR","position":3013,"present_in":["6.4","6.5","7.0","7.1","7.2","7.3","7.4","8.0","8.1","8.2","8.3","8.4","9.0","9.1","9.2","9.3","9.4","9.5","9.6","10","11","12","13","14","15","16","17","18","19","20"],"purpose":"remove an operator","purpose_zh":"","related":["create-operator","alter-operator"],"slug":"drop-operator","source_rev":"a709ab85","synopsis":"DROP OPERATOR [ IF EXISTS ] name ( { left_type | NONE } , right_type ) [, ...] [ CASCADE | RESTRICT ]","verb":"DROP"}},"Definition":{"Collection":"sql","Key":"drop-operator","SourceDatabase":"center","Version":"18","SourceTable":"sqlcmd","SourceKey":"drop-operator","SourceRevision":"a709ab85","Facts":{"anchor":"SQL-DROPOPERATOR","file":"sql-dropoperator.html","lang":"en","name":"DROP OPERATOR","purpose":"remove an operator","purpose_zh":"","related":["create-operator","alter-operator"],"sections":[{"html":"\u003cp\u003e\u003ccode class=\"command\"\u003eDROP OPERATOR\u003c/code\u003e drops an existing operator from the database system. To execute this command you must be the owner of the operator.\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 operator 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 (optionally schema-qualified) of an existing operator.\u003c/p\u003e\u003c/dd\u003e\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003cem class=\"replaceable\"\u003e\u003ccode\u003eleft_type\u003c/code\u003e\u003c/em\u003e\u003c/span\u003e\u003c/dt\u003e\u003cdd\u003e\u003cp\u003eThe data type of the operator's left operand; write \u003ccode class=\"literal\"\u003eNONE\u003c/code\u003e if the operator has no left operand.\u003c/p\u003e\u003c/dd\u003e\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003cem class=\"replaceable\"\u003e\u003ccode\u003eright_type\u003c/code\u003e\u003c/em\u003e\u003c/span\u003e\u003c/dt\u003e\u003cdd\u003e\u003cp\u003eThe data type of the operator's right operand.\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 operator (such as views using it), 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 operator 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\u003eRemove the power operator \u003ccode class=\"literal\"\u003ea^b\u003c/code\u003e for type \u003ccode class=\"type\"\u003einteger\u003c/code\u003e:\u003c/p\u003e\u003cpre class=\"programlisting\"\u003eDROP OPERATOR ^ (integer, integer);\n\u003c/pre\u003e\u003cp\u003eRemove the bitwise-complement prefix operator \u003ccode class=\"literal\"\u003e~b\u003c/code\u003e for type \u003ccode class=\"type\"\u003ebit\u003c/code\u003e:\u003c/p\u003e\u003cpre class=\"programlisting\"\u003eDROP OPERATOR ~ (none, bit);\n\u003c/pre\u003e\u003cp\u003eRemove multiple operators in one command:\u003c/p\u003e\u003cpre class=\"programlisting\"\u003eDROP OPERATOR ~ (none, bit), ^ (integer, integer);\n\u003c/pre\u003e","key":"examples","title":"Examples"},{"html":"\u003cp\u003eThere is no \u003ccode class=\"command\"\u003eDROP OPERATOR\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-operator/?v=18\" title=\"CREATE OPERATOR\"\u003e\u003cspan class=\"refentrytitle\"\u003eCREATE OPERATOR\u003c/span\u003e\u003c/a\u003e, \u003ca href=\"/wiki/sql/alter-operator/?v=18\" title=\"ALTER OPERATOR\"\u003e\u003cspan class=\"refentrytitle\"\u003eALTER OPERATOR\u003c/span\u003e\u003c/a\u003e\u003c/span\u003e","key":"see_also","title":"See Also"}],"sections_same_as":"","slug":"18","synopsis_html":"DROP OPERATOR [ IF EXISTS ] \u003cem class=\"replaceable\"\u003e\u003ccode\u003ename\u003c/code\u003e\u003c/em\u003e ( { \u003cem class=\"replaceable\"\u003e\u003ccode\u003eleft_type\u003c/code\u003e\u003c/em\u003e | NONE } , \u003cem class=\"replaceable\"\u003e\u003ccode\u003eright_type\u003c/code\u003e\u003c/em\u003e ) [, ...] [ CASCADE | RESTRICT ]","synopsis_text":"DROP OPERATOR [ IF EXISTS ] name ( { left_type | NONE } , right_type ) [, ...] [ CASCADE | RESTRICT ]"},"ManualEvidence":{},"MeasuredEvidence":{}},"Text":{"Collection":"sql","Key":"drop-operator","SourceDatabase":"pgweb","Version":"18","Locale":"zh-Hans","Title":"DROP OPERATOR","Summary":"移除一个操作符","BodyHTML":"\u003cpre\u003eDROP OPERATOR [ IF EXISTS ] name ( { left_type | NONE } , right_type ) [, ...] [ CASCADE | RESTRICT ]\u003c/pre\u003e\u003csection\u003e\u003ch2\u003e描述\u003c/h2\u003e\u003cp\u003e\u003ccode\u003eDROP OPERATOR\u003c/code\u003e从数据库系统中删除一个现有操作符。要执行此命令，你必须是该操作符的拥有者。\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如果该操作符不存在，则不要抛出错误。这种情况下会发出一条提示。\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一个现有操作符的名称（可以是模式限定的）。\u003c/p\u003e\u003c/dd\u003e\u003cdt\u003e\u003cspan\u003e\u003cem\u003e\u003ccode\u003eleft_type\u003c/code\u003e\u003c/em\u003e\u003c/span\u003e\u003c/dt\u003e\u003cdd\u003e\u003cp\u003e该操作符左操作数的数据类型；如果该操作符没有左操作数，请写 \u003ccode\u003eNONE\u003c/code\u003e。\u003c/p\u003e\u003c/dd\u003e\u003cdt\u003e\u003cspan\u003e\u003cem\u003e\u003ccode\u003eright_type\u003c/code\u003e\u003c/em\u003e\u003c/span\u003e\u003c/dt\u003e\u003cdd\u003e\u003cp\u003e该操作符右操作数的数据类型。\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自动删除依赖于该操作符的对象（例如使用它的视图），以及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操作符，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要移除用于类型\u003ccode\u003einteger\u003c/code\u003e的幂操作符\u003ccode\u003ea^b\u003c/code\u003e：\u003c/p\u003e\u003cpre\u003eDROP OPERATOR ^ (integer, integer);\n\u003c/pre\u003e\u003cp\u003e要移除用于类型\u003ccode\u003ebit\u003c/code\u003e的按位取反前缀操作符\u003ccode\u003e~b\u003c/code\u003e：\u003c/p\u003e\u003cpre\u003eDROP OPERATOR ~ (none, bit);\n\u003c/pre\u003e\u003cp\u003e在一条命令中移除多个操作符：\u003c/p\u003e\u003cpre\u003eDROP OPERATOR ~ (none, bit), ^ (integer, integer);\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 OPERATOR\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-operator/?v=18\" title=\"CREATE OPERATOR\" rel=\"nofollow\"\u003e\u003cspan\u003eCREATE OPERATOR\u003c/span\u003e\u003c/a\u003e, \u003ca href=\"/wiki/sql/alter-operator/?v=18\" title=\"ALTER OPERATOR\" rel=\"nofollow\"\u003e\u003cspan\u003eALTER OPERATOR\u003c/span\u003e\u003c/a\u003e\u003c/span\u003e\u003c/section\u003e","SourceRevision":"1b5ca64c","ContentHash":"e059a2d59ba35b99686d91fa6115df792dfa393099d5c3f3815f98ef1ebce69e","Payload":{"purpose_zh":"移除一个操作符","sections":[{"html":"\u003cp\u003e\u003ccode class=\"command\"\u003eDROP OPERATOR\u003c/code\u003e从数据库系统中删除一个现有操作符。要执行此命令，你必须是该操作符的拥有者。\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如果该操作符不存在，则不要抛出错误。这种情况下会发出一条提示。\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一个现有操作符的名称（可以是模式限定的）。\u003c/p\u003e\u003c/dd\u003e\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003cem class=\"replaceable\"\u003e\u003ccode\u003eleft_type\u003c/code\u003e\u003c/em\u003e\u003c/span\u003e\u003c/dt\u003e\u003cdd\u003e\u003cp\u003e该操作符左操作数的数据类型；如果该操作符没有左操作数，请写 \u003ccode class=\"literal\"\u003eNONE\u003c/code\u003e。\u003c/p\u003e\u003c/dd\u003e\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003cem class=\"replaceable\"\u003e\u003ccode\u003eright_type\u003c/code\u003e\u003c/em\u003e\u003c/span\u003e\u003c/dt\u003e\u003cdd\u003e\u003cp\u003e该操作符右操作数的数据类型。\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自动删除依赖于该操作符的对象（例如使用它的视图），以及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操作符，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要移除用于类型\u003ccode class=\"type\"\u003einteger\u003c/code\u003e的幂操作符\u003ccode class=\"literal\"\u003ea^b\u003c/code\u003e：\u003c/p\u003e\u003cpre class=\"programlisting\"\u003eDROP OPERATOR ^ (integer, integer);\n\u003c/pre\u003e\u003cp\u003e要移除用于类型\u003ccode class=\"type\"\u003ebit\u003c/code\u003e的按位取反前缀操作符\u003ccode class=\"literal\"\u003e~b\u003c/code\u003e：\u003c/p\u003e\u003cpre class=\"programlisting\"\u003eDROP OPERATOR ~ (none, bit);\n\u003c/pre\u003e\u003cp\u003e在一条命令中移除多个操作符：\u003c/p\u003e\u003cpre class=\"programlisting\"\u003eDROP OPERATOR ~ (none, bit), ^ (integer, integer);\n\u003c/pre\u003e","key":"examples","title":"示例"},{"html":"\u003cp\u003eSQL 标准中没有\u003ccode class=\"command\"\u003eDROP OPERATOR\u003c/code\u003e语句。\u003c/p\u003e","key":"compatibility","title":"兼容性"},{"html":"\u003cspan class=\"simplelist\"\u003e\u003ca href=\"/wiki/sql/create-operator/?v=18\" title=\"CREATE OPERATOR\"\u003e\u003cspan class=\"refentrytitle\"\u003eCREATE OPERATOR\u003c/span\u003e\u003c/a\u003e, \u003ca href=\"/wiki/sql/alter-operator/?v=18\" title=\"ALTER OPERATOR\"\u003e\u003cspan class=\"refentrytitle\"\u003eALTER OPERATOR\u003c/span\u003e\u003c/a\u003e\u003c/span\u003e","key":"see_also","title":"另见"}],"sections_same_as":"","synopsis_html":"DROP OPERATOR [ IF EXISTS ] \u003cem class=\"replaceable\"\u003e\u003ccode\u003ename\u003c/code\u003e\u003c/em\u003e ( { \u003cem class=\"replaceable\"\u003e\u003ccode\u003eleft_type\u003c/code\u003e\u003c/em\u003e | NONE } , \u003cem class=\"replaceable\"\u003e\u003ccode\u003eright_type\u003c/code\u003e\u003c/em\u003e ) [, ...] [ CASCADE | RESTRICT ]","synopsis_text":"DROP OPERATOR [ IF EXISTS ] name ( { left_type | NONE } , right_type ) [, ...] [ CASCADE | RESTRICT ]"}},"RequestedLocale":"zh-Hans","Fallback":false,"Versions":["10","11","12","13","14","15","16","17","18","19","20","6.4","6.5","7.0","7.1","7.2","7.3","7.4","8.0","8.1","8.2","8.3","8.4","9.0","9.1","9.2","9.3","9.4","9.5","9.6"],"Locales":["en","zh-Hans"],"Signatures":null,"Spellings":null,"SQLState":null,"Evidence":null}