{"Entry":{"collection":"protocol","key":"close-f","name":"Close","aliases":["Close","Byte1('C')"],"metadata":{"aliases":["Close","Byte1('C')"],"category":"Frontend messages","content_hash":"65fa478bdbeada13cc7a14fe9b60b60c07438d7841ef5324cc714b40e26a98aa","derived_content_hash":"5ce309646bef47ac250ae1f8678beeae38e1eeef855dfd667190cc0daa170f20","imported_at":"2026-09-30T00:40:44.531889+08:00","name":"Close","name_zh":"","slug":"close-f","summary":"Close is a frontend protocol message. Identifies the message as a Close command."}},"Definition":{"Collection":"protocol","Key":"close-f","SourceDatabase":"center","Version":"18","SourceTable":"protocol_message","SourceKey":"close-f","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","Facts":{"comparison_data":{"direction":"F","fields":[{"description":"Identifies the message as a Close command.","format":"Byte1('C')"},{"description":"Length of message contents in bytes, including self.","format":"Int32"},{"description":"' S ' to close a prepared statement; or ' P ' to close a portal.","format":"Byte1"},{"description":"The name of the prepared statement or portal to close (an empty string selects the unnamed prepared statement or portal).","format":"String"}]},"comparison_hash":"331535c9ff78c47123039e8ab20f75cd2fa1d73d7ed66e182bdf35bd3b8524f5","description":["Close is a frontend protocol message. Identifies the message as a Close command."],"description_zh":"Byte1('C') 将该消息标识为 Close 命令。 Int32 消息内容的长度（以字节为单位），包括其自身。 Byte1 “ S ”表示关闭预备语句；“ P ”表示关闭 portal。 String 要关闭的预备语句或 portal 的名称（空字符串选择未命名的预备语句或 portal）。","description_zh_html":"\u003cp\u003e协议消息 Close (F)。\u003c/p\u003e\u003ch3\u003e同版本中文手册定义\u003c/h3\u003e\u003cdd\u003e\u003cdiv class=\"variablelist\"\u003e\u003cdl class=\"variablelist\"\u003e\u003cdt\u003e\u003cspan class=\"term\"\u003eByte1('C')\u003c/span\u003e \u003c/dt\u003e\u003cdd\u003e\u003cp\u003e\n         将该消息标识为 Close 命令。\n        \u003c/p\u003e\u003c/dd\u003e\u003cdt\u003e\u003cspan class=\"term\"\u003eInt32\u003c/span\u003e \u003c/dt\u003e\u003cdd\u003e\u003cp\u003e\n         消息内容的长度（以字节为单位），包括其自身。\n        \u003c/p\u003e\u003c/dd\u003e\u003cdt\u003e\u003cspan class=\"term\"\u003eByte1\u003c/span\u003e \u003c/dt\u003e\u003cdd\u003e\u003cp\u003e\n         “\u003ccode class=\"literal\"\u003eS\u003c/code\u003e”表示关闭预备语句；“\u003ccode class=\"literal\"\u003eP\u003c/code\u003e”表示关闭 portal。\n        \u003c/p\u003e\u003c/dd\u003e\u003cdt\u003e\u003cspan class=\"term\"\u003eString\u003c/span\u003e \u003c/dt\u003e\u003cdd\u003e\u003cp\u003e\n         要关闭的预备语句或 portal 的名称（空字符串选择未命名的预备语句或 portal）。\n        \u003c/p\u003e\u003c/dd\u003e\u003c/dl\u003e\u003c/div\u003e\u003c/dd\u003e\u003cp\u003e\u003ca href=\"/zh/docs/18/protocol-message-formats.html#PROTOCOL-MESSAGE-FORMATS-CLOSE\"\u003e查看完整中文手册与上下文\u003c/a\u003e。\u003c/p\u003e","direction":"F","facts":[{"label":"Direction","value":"Frontend → backend"},{"label":"First wire field","value":"Byte1('C')"},{"label":"Field entries","value":"4"},{"label":"Documented flow contexts","value":"Extended Query"}],"facts_zh":[{"label":"方向","value":"前端 → 后端"},{"label":"首个线上协议字段","value":"Byte1('C')"},{"label":"字段条目","value":"4"},{"label":"手册中的交互阶段","value":"扩展查询"}],"fields":[{"description":"Identifies the message as a Close command.","format":"Byte1('C')"},{"description":"Length of message contents in bytes, including self.","format":"Int32"},{"description":"' S ' to close a prepared statement; or ' P ' to close a portal.","format":"Byte1"},{"description":"The name of the prepared statement or portal to close (an empty string selects the unnamed prepared statement or portal).","format":"String"}],"manual_html":"\u003cdl\u003e\u003cdd\u003e\n\u003cdiv class=\"variablelist\"\u003e\n\u003cdl class=\"variablelist\"\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003eByte1('C')\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eIdentifies the message as a Close command.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003eInt32\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eLength of message contents in bytes, including self.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003eByte1\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003e'\u003ccode class=\"literal\"\u003eS\u003c/code\u003e' to close a prepared statement; or '\u003ccode class=\"literal\"\u003eP\u003c/code\u003e' to close a portal.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003eString\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eThe name of the prepared statement or portal to close (an empty string selects the unnamed prepared statement or portal).\u003c/p\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003c/div\u003e\n\u003c/dd\u003e\u003c/dl\u003e","manual_path":"/docs/18/protocol-message-formats.html","related":[{"label":"Protocol flow and exchange examples","url":"/docs/18/protocol-flow.html"},{"label":"Protocol overview","url":"/docs/18/protocol-overview.html"},{"label":"Extended Query","url":"/docs/18/protocol-flow.html#PROTOCOL-FLOW-EXT-QUERY"}],"release":{"channel":"stable","label":"18.6","major":"18","ref":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","revision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"},"sections":[{"paragraphs":["The complete definition below retains repetition, counts and conditional fields. A numbered table row is a documented field definition, not a fixed byte offset. Integer encodings and flow rules follow the same-version protocol chapter."],"title":"Framing and repetition"}],"sections_zh":[{"paragraphs":["下方完整定义保留重复项、计数与条件字段。表格行号表示文档中的字段定义，并非固定字节偏移量。整数编码与交互流程以同版本协议章节为准。"],"title":"消息边界与重复字段"}],"signature":"Close (F)","sources":[{"label":"PostgreSQL 18 English manual","path":"protocol-message-formats.html","sha256":"53f37652ac2c089e30ada87d8aee7bdd0f26695b03f275302e526a807d2a1f23","url":"/docs/18/protocol-message-formats.html#PROTOCOL-MESSAGE-FORMATS-CLOSE"}],"tables":[{"columns":[{"key":"c0","label":"Position"},{"key":"c1","label":"Format"},{"key":"c2","label":"Meaning"}],"key":"fields","rows":[{"c0":"1","c1":"Byte1('C')","c2":"Identifies the message as a Close command."},{"c0":"2","c1":"Int32","c2":"Length of message contents in bytes, including self."},{"c0":"3","c1":"Byte1","c2":"' S ' to close a prepared statement; or ' P ' to close a portal."},{"c0":"4","c1":"String","c2":"The name of the prepared statement or portal to close (an empty string selects the unnamed prepared statement or portal)."}],"title":"Wire fields in documented order"}],"tables_zh":[{"columns":[{"key":"c0","label":"位置"},{"key":"c1","label":"格式"},{"key":"c2","label":"含义"}],"key":"fields","rows":[{"c0":"1","c1":"Byte1('C')","c2":"将该消息标识为 Close 命令。"},{"c0":"2","c1":"Int32","c2":"消息内容的长度（以字节为单位），包括其自身。"},{"c0":"3","c1":"Byte1","c2":"“ S ”表示关闭预备语句；“ P ”表示关闭 portal。"},{"c0":"4","c1":"字符串","c2":"要关闭的预备语句或 portal 的名称（空字符串选择未命名的预备语句或 portal）。"}],"title":"按手册顺序排列的线上协议字段"}],"zh_from":{"authored_translation":"source-derived-identity","body_sha256":"7ec97e0bdc9589892a04fe8dfeba466f8df86d421e98d7030b80aac666fbaa32","kind":"same-version-chinese-manual-with-source-derived-identity","manual":{"anchor":"PROTOCOL-MESSAGE-FORMATS-CLOSE","build_id":107,"extraction":"exact-definition","fragment_sha256":"3495ca8e5c51afd7f499301ac9772e81bd109ee22c7f94b8b9139510749c78ec","locale":"zh-Hans","page_key":"protocol-message-formats.html","source_hash":"0be0a37b38d80c96c157ca9fcfe9222995654664aad8136f7ac2b1b552f6753a","source_revision":"unknown:rendered-translation-baseline","translated_from_revision":null,"translation_revision":"git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:08e987a66af27b98444a8057c256314eafa13611a3fb9e888214fc436824244b","url":"/zh/docs/18/protocol-message-formats.html#PROTOCOL-MESSAGE-FORMATS-CLOSE","version":"18"},"runtime_rerun":false,"source_facts_revision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}},"ManualEvidence":{"manual_path":"/docs/18/protocol-message-formats.html","release":{"channel":"stable","label":"18.6","major":"18","ref":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","revision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"},"sources":[{"label":"PostgreSQL 18 English manual","path":"protocol-message-formats.html","sha256":"53f37652ac2c089e30ada87d8aee7bdd0f26695b03f275302e526a807d2a1f23","url":"/docs/18/protocol-message-formats.html#PROTOCOL-MESSAGE-FORMATS-CLOSE"}]},"MeasuredEvidence":{}},"Text":{"Collection":"protocol","Key":"close-f","SourceDatabase":"center","Version":"18","Locale":"en","Title":"Close","Summary":"Close is a frontend protocol message. Identifies the message as a Close command.","BodyHTML":"\u003cdl\u003e\u003cdd\u003e\n\u003cdiv\u003e\n\u003cdl\u003e\n\u003cdt\u003e\u003cspan\u003eByte1(\u0026#39;C\u0026#39;)\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eIdentifies the message as a Close command.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan\u003eInt32\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eLength of message contents in bytes, including self.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan\u003eByte1\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003e\u0026#39;\u003ccode\u003eS\u003c/code\u003e\u0026#39; to close a prepared statement; or \u0026#39;\u003ccode\u003eP\u003c/code\u003e\u0026#39; to close a portal.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan\u003eString\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eThe name of the prepared statement or portal to close (an empty string selects the unnamed prepared statement or portal).\u003c/p\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003c/div\u003e\n\u003c/dd\u003e\u003c/dl\u003e","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","ContentHash":"bb4ac35f7a0b75a4cd6d4dbe3d61091a806663fea758d1a6d48887f62f905f2b","Payload":{"description":["Close is a frontend protocol message. Identifies the message as a Close command."],"manual_html":"\u003cdl\u003e\u003cdd\u003e\n\u003cdiv class=\"variablelist\"\u003e\n\u003cdl class=\"variablelist\"\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003eByte1('C')\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eIdentifies the message as a Close command.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003eInt32\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eLength of message contents in bytes, including self.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003eByte1\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003e'\u003ccode class=\"literal\"\u003eS\u003c/code\u003e' to close a prepared statement; or '\u003ccode class=\"literal\"\u003eP\u003c/code\u003e' to close a portal.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003eString\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eThe name of the prepared statement or portal to close (an empty string selects the unnamed prepared statement or portal).\u003c/p\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003c/div\u003e\n\u003c/dd\u003e\u003c/dl\u003e","related":[{"label":"Protocol flow and exchange examples","url":"/docs/18/protocol-flow.html"},{"label":"Protocol overview","url":"/docs/18/protocol-overview.html"},{"label":"Extended Query","url":"/docs/18/protocol-flow.html#PROTOCOL-FLOW-EXT-QUERY"}],"sections":[{"paragraphs":["The complete definition below retains repetition, counts and conditional fields. A numbered table row is a documented field definition, not a fixed byte offset. Integer encodings and flow rules follow the same-version protocol chapter."],"title":"Framing and repetition"}],"tables":[{"columns":[{"key":"c0","label":"Position"},{"key":"c1","label":"Format"},{"key":"c2","label":"Meaning"}],"key":"fields","rows":[{"c0":"1","c1":"Byte1('C')","c2":"Identifies the message as a Close command."},{"c0":"2","c1":"Int32","c2":"Length of message contents in bytes, including self."},{"c0":"3","c1":"Byte1","c2":"' S ' to close a prepared statement; or ' P ' to close a portal."},{"c0":"4","c1":"String","c2":"The name of the prepared statement or portal to close (an empty string selects the unnamed prepared statement or portal)."}],"title":"Wire fields in documented order"}]}},"RequestedLocale":"en","Fallback":false,"Versions":["10","11","12","13","14","15","16","17","18","19","20"],"Locales":["en","zh-Hans"],"Signatures":null,"Spellings":null,"SQLState":null,"Evidence":null}