{"Entry":{"collection":"psql","key":"cmd-6c-6f-5f-65-78-70-6f-72-74","name":"\\lo_export","aliases":["\\lo_export"],"metadata":{"aliases":["\\lo_export"],"category":"Data transfer and large objects","content_hash":"61052022ada4493642cd069a0af901199ba0a2da9dae8f2b6e4e6ddeb08e57ec","imported_at":"2026-09-30T00:40:45.099385+08:00","name":"\\lo_export","name_zh":"","slug":"cmd-6c-6f-5f-65-78-70-6f-72-74","summary":"Reads the large object with OID loid from the database and writes it to filename . Note that this is subtly different from the server function lo_export , which acts with the permissions of the user that the database server runs as and on the server's file system."}},"Definition":{"Collection":"psql","Key":"cmd-6c-6f-5f-65-78-70-6f-72-74","SourceDatabase":"center","Version":"18","SourceTable":"psql_command","SourceKey":"cmd-6c-6f-5f-65-78-70-6f-72-74","SourceRevision":"ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8","Facts":{"command":"\\lo_export","comparison_data":{"definition":"Reads the large object with OID loid from the database and writes it to filename . Note that this is subtly different from the server function lo_export , which acts with the permissions of the user that the database server runs as and on the server's file system. Tip Use \\lo_list to find out the large object's OID .","modifiers":[],"signature":"\\lo_export loid filename","spellings":["\\lo_export"]},"comparison_hash":"7eb0e773a570c5f093a6b3f3d0cd2f095e978b96f1071d8b49412e804cf30eca","description":["Reads the large object with OID loid from the database and writes it to filename . Note that this is subtly different from the server function lo_export , which acts with the permissions of the user that the database server runs as and on the server's file system."],"facts":[{"label":"Client","value":"psql 18.6"},{"label":"Case-sensitive spelling","value":"\\lo_export"}],"manual_html":"\u003cdiv\u003e\u003cdl class=\"variablelist\"\u003e\u003cdt id=\"APP-PSQL-META-COMMAND-LO-EXPORT\"\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"literal\"\u003e\\lo_export \u003cem class=\"replaceable\"\u003e\u003ccode\u003eloid\u003c/code\u003e\u003c/em\u003e \u003cem class=\"replaceable\"\u003e\u003ccode\u003efilename\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003c/span\u003e \u003c/dt\u003e\u003cdd\u003e\n\u003cp\u003eReads the large object with OID \u003cem class=\"replaceable\"\u003e\u003ccode\u003eloid\u003c/code\u003e\u003c/em\u003e from the database and writes it to \u003cem class=\"replaceable\"\u003e\u003ccode\u003efilename\u003c/code\u003e\u003c/em\u003e. Note that this is subtly different from the server function \u003ccode class=\"function\"\u003elo_export\u003c/code\u003e, which acts with the permissions of the user that the database server runs as and on the server's file system.\u003c/p\u003e\n\u003cdiv class=\"tip\"\u003e\n\u003ch3 class=\"title\"\u003eTip\u003c/h3\u003e\n\u003cp\u003eUse \u003ccode class=\"command\"\u003e\\lo_list\u003c/code\u003e to find out the large object's OID.\u003c/p\u003e\n\u003c/div\u003e\n\u003c/dd\u003e\u003c/dl\u003e\u003c/div\u003e","manual_path":"app-psql.html#APP-PSQL-META-COMMAND-LO-EXPORT","modifiers":[],"related":[{"label":"psql command-line options and complete manual","url":"/wiki/tool/psql/?v=18"}],"release":{"channel":"stable","evidence_kind":"English manual and source declarations","label":"18.6","major":"18","manifest":{"index":"index.html","major":"18","pages":1148,"pdf":{"A4":{"built_at":"2026-09-26","bytes":15865106,"pages":3154,"sha256":"19512c405da53f9f7fcf0abba359223aa65f021be025bf3411381918f92e3190","url":"/files/documentation/pdf/18/postgresql-18-A4.pdf"},"US":{"built_at":"2026-09-26","bytes":15748059,"pages":3328,"sha256":"facbe6c229e598b872d3d98bef53308f46e06746006fa4590de9a7de9dd46319","url":"/files/documentation/pdf/18/postgresql-18-US.pdf"}},"release":"18.6","source_mode":"en SGML built with pinned official archive","source_sha256":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","source_url":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","svg_assets":3,"tree":"18"},"ref":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","revision":"ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8","source_sha256":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"},"sections":[],"signature":"\\lo_export loid filename","sources":[{"anchor":"APP-PSQL-META-COMMAND-LO-EXPORT","file":"app-psql.html","label":"18.6 English manual · app-psql.html","sha256":"fa2a1d39294b8854318e82e93f71272c645ed88150ecc2786c28902c3f32782c","url":"/docs/18/app-psql.html#APP-PSQL-META-COMMAND-LO-EXPORT"}],"spellings":["\\lo_export"],"tables":[{"columns":[{"key":"command","label":"Command"},{"key":"modifiers","label":"Documented suffix modifiers"}],"key":"spellings","rows":[{"command":{"text":"\\lo_export","url":"/wiki/psql/cmd-6c-6f-5f-65-78-70-6f-72-74/?v=18"},"modifiers":"None listed in this signature"}],"title":"Spellings in this manual definition"}]},"ManualEvidence":{"manual_path":"app-psql.html#APP-PSQL-META-COMMAND-LO-EXPORT","release":{"channel":"stable","evidence_kind":"English manual and source declarations","label":"18.6","major":"18","manifest":{"index":"index.html","major":"18","pages":1148,"pdf":{"A4":{"built_at":"2026-09-26","bytes":15865106,"pages":3154,"sha256":"19512c405da53f9f7fcf0abba359223aa65f021be025bf3411381918f92e3190","url":"/files/documentation/pdf/18/postgresql-18-A4.pdf"},"US":{"built_at":"2026-09-26","bytes":15748059,"pages":3328,"sha256":"facbe6c229e598b872d3d98bef53308f46e06746006fa4590de9a7de9dd46319","url":"/files/documentation/pdf/18/postgresql-18-US.pdf"}},"release":"18.6","source_mode":"en SGML built with pinned official archive","source_sha256":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","source_url":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","svg_assets":3,"tree":"18"},"ref":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","revision":"ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8","source_sha256":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"},"sources":[{"anchor":"APP-PSQL-META-COMMAND-LO-EXPORT","file":"app-psql.html","label":"18.6 English manual · app-psql.html","sha256":"fa2a1d39294b8854318e82e93f71272c645ed88150ecc2786c28902c3f32782c","url":"/docs/18/app-psql.html#APP-PSQL-META-COMMAND-LO-EXPORT"}]},"MeasuredEvidence":{}},"Text":{"Collection":"psql","Key":"cmd-6c-6f-5f-65-78-70-6f-72-74","SourceDatabase":"center","Version":"18","Locale":"en","Title":"\\lo_export","Summary":"Reads the large object with OID loid from the database and writes it to filename . Note that this is subtly different from the server function lo_export , which acts with the permissions of the user that the database server runs as and on the server's file system.","BodyHTML":"\u003cdiv\u003e\u003cdl\u003e\u003cdt id=\"APP-PSQL-META-COMMAND-LO-EXPORT\"\u003e\u003cspan\u003e\u003ccode\u003e\\lo_export \u003cem\u003e\u003ccode\u003eloid\u003c/code\u003e\u003c/em\u003e \u003cem\u003e\u003ccode\u003efilename\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003c/span\u003e \u003c/dt\u003e\u003cdd\u003e\n\u003cp\u003eReads the large object with OID \u003cem\u003e\u003ccode\u003eloid\u003c/code\u003e\u003c/em\u003e from the database and writes it to \u003cem\u003e\u003ccode\u003efilename\u003c/code\u003e\u003c/em\u003e. Note that this is subtly different from the server function \u003ccode\u003elo_export\u003c/code\u003e, which acts with the permissions of the user that the database server runs as and on the server\u0026#39;s file system.\u003c/p\u003e\n\u003cdiv\u003e\n\u003ch3\u003eTip\u003c/h3\u003e\n\u003cp\u003eUse \u003ccode\u003e\\lo_list\u003c/code\u003e to find out the large object\u0026#39;s OID.\u003c/p\u003e\n\u003c/div\u003e\n\u003c/dd\u003e\u003c/dl\u003e\u003c/div\u003e","SourceRevision":"ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8","ContentHash":"37adbfe2e470c64c4427c166e0d9c0d8f207f9610fbd09b191212d74d806ffa2","Payload":{"description":["Reads the large object with OID loid from the database and writes it to filename . Note that this is subtly different from the server function lo_export , which acts with the permissions of the user that the database server runs as and on the server's file system."],"manual_html":"\u003cdiv\u003e\u003cdl class=\"variablelist\"\u003e\u003cdt id=\"APP-PSQL-META-COMMAND-LO-EXPORT\"\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"literal\"\u003e\\lo_export \u003cem class=\"replaceable\"\u003e\u003ccode\u003eloid\u003c/code\u003e\u003c/em\u003e \u003cem class=\"replaceable\"\u003e\u003ccode\u003efilename\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003c/span\u003e \u003c/dt\u003e\u003cdd\u003e\n\u003cp\u003eReads the large object with OID \u003cem class=\"replaceable\"\u003e\u003ccode\u003eloid\u003c/code\u003e\u003c/em\u003e from the database and writes it to \u003cem class=\"replaceable\"\u003e\u003ccode\u003efilename\u003c/code\u003e\u003c/em\u003e. Note that this is subtly different from the server function \u003ccode class=\"function\"\u003elo_export\u003c/code\u003e, which acts with the permissions of the user that the database server runs as and on the server's file system.\u003c/p\u003e\n\u003cdiv class=\"tip\"\u003e\n\u003ch3 class=\"title\"\u003eTip\u003c/h3\u003e\n\u003cp\u003eUse \u003ccode class=\"command\"\u003e\\lo_list\u003c/code\u003e to find out the large object's OID.\u003c/p\u003e\n\u003c/div\u003e\n\u003c/dd\u003e\u003c/dl\u003e\u003c/div\u003e","related":[{"label":"psql command-line options and complete manual","url":"/wiki/tool/psql/?v=18"}],"sections":[],"tables":[{"columns":[{"key":"command","label":"Command"},{"key":"modifiers","label":"Documented suffix modifiers"}],"key":"spellings","rows":[{"command":{"text":"\\lo_export","url":"/wiki/psql/cmd-6c-6f-5f-65-78-70-6f-72-74/?v=18"},"modifiers":"None listed in this signature"}],"title":"Spellings in this manual definition"}]}},"RequestedLocale":"zh-Hans","Fallback":true,"Versions":["10","11","12","13","14","15","16","17","18","19","20"],"Locales":["en"],"Signatures":null,"Spellings":[{"Version":"18","Ordinal":0,"Command":"\\lo_export","Signature":"\\lo_export loid filename","Modifiers":[]}],"SQLState":null,"Evidence":null}
