{"Entry":{"collection":"sql","key":"drop-foreign-data-wrapper","name":"DROP FOREIGN DATA WRAPPER","aliases":["dropforeigndatawrapper"],"metadata":{"aliases":["dropforeigndatawrapper"],"changed_in":["10"],"changes":[{"from":"8.3","purpose_changed":false,"renamed":null,"sections":{"added":[],"changed":[],"removed":[]},"status":"added","synopsis":null,"to":"8.4"},{"from":"9.5","purpose_changed":false,"renamed":null,"sections":{"added":[],"changed":["parameters"],"removed":[]},"status":"changed","synopsis":null,"to":"9.6"},{"from":"9.6","purpose_changed":false,"renamed":null,"sections":{"added":[],"changed":[],"removed":[]},"status":"changed","synopsis":{"added":["DROP FOREIGN DATA WRAPPER [ IF EXISTS ] name [, ...] [ CASCADE | RESTRICT 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WRAPPER","position":9002,"present_in":["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 a foreign-data wrapper","purpose_zh":"","related":["create-foreign-data-wrapper","alter-foreign-data-wrapper"],"repair_provenance":{"original_source_revision":"wiki-repair-20261023:ac5e179cc6e7add1362c0b69761f969e1fa52a1a554f50f24a9903d37bdc52d0","receipt_sha256":"ad2bca30878d077beafba9451358e8b36a0b439fb91c00c2a50d02581bd8891b","repair":"wiki-repair-20261023"},"slug":"drop-foreign-data-wrapper","source_rev":"wiki-repair-20261023:f2b5b00f870221f08e56f7b664be2463bcf73bde6b11a0700302fc2fe285e05a","synopsis":"DROP FOREIGN DATA WRAPPER [ IF EXISTS ] name [, ...] [ CASCADE | RESTRICT 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EXISTS\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\u003cdd\u003e\u003cp\u003e\n      如果该外部数据包装器不存在，则不要抛出错误。这种情况下会发出一个提示。\n     \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\n      一个现有外部数据包装器的名称。\n     \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\n      自动删除依赖于该外部数据包装器的对象（例如外部表和服务器），以及进一步依赖于这些对象的所有对象（参见\u003ca class=\"xref\" href=\"/zh/docs/18/ddl-depend.html\" title=\"5.15. 依赖跟踪\"\u003e第 5.15 节\u003c/a\u003e）。\n     \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\n      如果有任何对象依赖于该外部数据包装器，则拒绝删除它。这是默认值。\n     \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\n   删除外部数据包装器 \u003ccode class=\"literal\"\u003edbi\u003c/code\u003e：\n\u003c/p\u003e\u003cpre class=\"programlisting\"\u003e\nDROP FOREIGN DATA WRAPPER dbi;\n\u003c/pre\u003e\u003c/section\u003e\u003csection\u003e\u003ch2\u003e兼容性\u003c/h2\u003e\u003cp\u003e\n\u003ccode class=\"command\"\u003eDROP FOREIGN DATA WRAPPER\u003c/code\u003e 符合 ISO/IEC 9075-9（SQL/MED）。\u003ccode class=\"literal\"\u003eIF EXISTS\u003c/code\u003e 子句是 \u003cspan class=\"productname\"\u003ePostgreSQL\u003c/span\u003e 扩展。\n  \u003c/p\u003e\u003c/section\u003e\u003csection\u003e\u003ch2\u003e另见\u003c/h2\u003e\u003cspan class=\"simplelist\"\u003e\u003ca class=\"xref\" href=\"/zh/docs/18/sql-createforeigndatawrapper.html\" title=\"CREATE FOREIGN DATA WRAPPER\"\u003e\u003cspan class=\"refentrytitle\"\u003eCREATE FOREIGN DATA WRAPPER\u003c/span\u003e\u003c/a\u003e, \u003ca class=\"xref\" href=\"/zh/docs/18/sql-alterforeigndatawrapper.html\" title=\"ALTER FOREIGN DATA WRAPPER\"\u003e\u003cspan class=\"refentrytitle\"\u003eALTER FOREIGN DATA WRAPPER\u003c/span\u003e\u003c/a\u003e\u003c/span\u003e\u003c/section\u003e","file":"sql-dropforeigndatawrapper.html","lang":"en","name":"DROP FOREIGN DATA WRAPPER","purpose":"remove a foreign-data wrapper","purpose_zh":"移除一个外部数据包装器","related":["create-foreign-data-wrapper","alter-foreign-data-wrapper"],"sections":[{"html":"\u003cp\u003e\u003ccode class=\"command\"\u003eDROP FOREIGN DATA WRAPPER\u003c/code\u003e removes an existing foreign-data wrapper. To execute this command, the current user must be the owner of the foreign-data wrapper.\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 foreign-data wrapper 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 an existing foreign-data wrapper.\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 foreign-data wrapper (such as foreign tables and servers), 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 foreign-data wrapper 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\u003eDrop the foreign-data wrapper \u003ccode class=\"literal\"\u003edbi\u003c/code\u003e:\u003c/p\u003e\u003cpre class=\"programlisting\"\u003eDROP FOREIGN DATA WRAPPER dbi;\n\u003c/pre\u003e","key":"examples","title":"Examples"},{"html":"\u003cp\u003e\u003ccode class=\"command\"\u003eDROP FOREIGN DATA WRAPPER\u003c/code\u003e conforms to ISO/IEC 9075-9 (SQL/MED). 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To execute this command, the current user must be the owner of the foreign-data wrapper.\u003c/p\u003e\u003c/section\u003e\u003csection\u003e\u003ch2\u003eParameters\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\u003eDo not throw an error if the foreign-data wrapper does not exist. A notice is issued in this case.\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\u003eThe name of an existing foreign-data wrapper.\u003c/p\u003e\u003c/dd\u003e\u003cdt\u003e\u003cspan\u003e\u003ccode\u003eCASCADE\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\u003cdd\u003e\u003cp\u003eAutomatically drop objects that depend on the foreign-data wrapper (such as foreign tables and servers), and in turn all objects that depend on those objects (see \u003ca href=\"/docs/18/ddl-depend.html\" rel=\"nofollow\"\u003eSection 5.15\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\u003eRefuse to drop the foreign-data wrapper if any objects depend on it. This is the default.\u003c/p\u003e\u003c/dd\u003e\u003c/dl\u003e\u003c/div\u003e\u003c/section\u003e\u003csection\u003e\u003ch2\u003eExamples\u003c/h2\u003e\u003cp\u003eDrop the foreign-data wrapper \u003ccode\u003edbi\u003c/code\u003e:\u003c/p\u003e\u003cpre\u003eDROP FOREIGN DATA WRAPPER dbi;\n\u003c/pre\u003e\u003c/section\u003e\u003csection\u003e\u003ch2\u003eCompatibility\u003c/h2\u003e\u003cp\u003e\u003ccode\u003eDROP FOREIGN DATA WRAPPER\u003c/code\u003e conforms to ISO/IEC 9075-9 (SQL/MED). The \u003ccode\u003eIF EXISTS\u003c/code\u003e clause is a \u003cspan\u003ePostgreSQL\u003c/span\u003e extension.\u003c/p\u003e\u003c/section\u003e\u003csection\u003e\u003ch2\u003eSee Also\u003c/h2\u003e\u003cspan\u003e\u003ca href=\"/wiki/sql/create-foreign-data-wrapper/?v=18\" title=\"CREATE FOREIGN DATA WRAPPER\" rel=\"nofollow\"\u003e\u003cspan\u003eCREATE FOREIGN DATA WRAPPER\u003c/span\u003e\u003c/a\u003e, \u003ca href=\"/wiki/sql/alter-foreign-data-wrapper/?v=18\" title=\"ALTER FOREIGN DATA WRAPPER\" rel=\"nofollow\"\u003e\u003cspan\u003eALTER FOREIGN DATA WRAPPER\u003c/span\u003e\u003c/a\u003e\u003c/span\u003e\u003c/section\u003e","SourceRevision":"wiki-repair-20261023:f2b5b00f870221f08e56f7b664be2463bcf73bde6b11a0700302fc2fe285e05a","ContentHash":"7c71d4cdf6912c99a6653f54b77eff66e9e1246432bbb9d48de63efefe7bc2f2","Payload":{"related":["create-foreign-data-wrapper","alter-foreign-data-wrapper"],"sections":[{"html":"\u003cp\u003e\u003ccode class=\"command\"\u003eDROP FOREIGN DATA WRAPPER\u003c/code\u003e removes an existing foreign-data wrapper. To execute this command, the current user must be the owner of the foreign-data wrapper.\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 foreign-data wrapper 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 an existing foreign-data wrapper.\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 foreign-data wrapper (such as foreign tables and servers), 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 foreign-data wrapper 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\u003eDrop the foreign-data wrapper \u003ccode class=\"literal\"\u003edbi\u003c/code\u003e:\u003c/p\u003e\u003cpre class=\"programlisting\"\u003eDROP FOREIGN DATA WRAPPER dbi;\n\u003c/pre\u003e","key":"examples","title":"Examples"},{"html":"\u003cp\u003e\u003ccode class=\"command\"\u003eDROP FOREIGN DATA WRAPPER\u003c/code\u003e conforms to ISO/IEC 9075-9 (SQL/MED). 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