{"Entry":{"collection":"sqlstate","key":"HV000","name":"HV000","aliases":[],"metadata":{"aliases":[],"case_count":0,"class_code":"HV","condition_name":"fdw_error","condition_names":["fdw_error"],"content_hash":"95b4b485d55985d2891c2e8ba865dfc22cda8670ac612b3a4732a8210e4c93cc","depth":"reference","editorial_review":"reviewed","evidence_tier":"definition_only","imported_at":"2026-09-30T17:45:27.984334+08:00","introduced":null,"known_present_by":"9.1.0","macros":["ERRCODE_FDW_ERROR"],"name_zh":"外部数据包装器错误","present_in":["9.1","9.2","9.3","9.4","9.5","9.6","10","11","12","13","14","15","16","17","18","19"],"preview_in":["19"],"primary_macro":"ERRCODE_FDW_ERROR","removed":null,"runtime_verification":"not_run","severity_classes":["E"],"snippet_count":0,"source_rev":"english-manuals:955864d2bb9680d4dc0dc21453a0cdf05cc4bb860ca9ae74b50ede8b0a1393a4","sqlstate":"HV000","status":"active","summary_zh":"外部数据包装器的通用错误，需看包装器诊断。"}},"Definition":{"Collection":"sqlstate","Key":"HV000","SourceDatabase":"center","Version":"18","SourceTable":"sqlstate","SourceKey":"HV000","SourceRevision":"english-manuals:955864d2bb9680d4dc0dc21453a0cdf05cc4bb860ca9ae74b50ede8b0a1393a4","Facts":{"aliases":[],"class_name":"Foreign Data Wrapper Error (SQL/MED)","condition_name":"fdw_error","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"56dacf78e618ff0fd8c533e05db597b80d7ebbad7f8e512a888217d0640aa328","slug":"18"},"lang":"en","sqlstate":"HV000"},"ManualEvidence":{"doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"56dacf78e618ff0fd8c533e05db597b80d7ebbad7f8e512a888217d0640aa328","slug":"18"}},"MeasuredEvidence":{}},"Text":{"Collection":"sqlstate","Key":"HV000","SourceDatabase":"center","Version":"","Locale":"zh-Hans","Title":"HV000 — fdw_error（外部数据包装器错误）","Summary":"外部数据包装器的通用错误，需看包装器诊断。","BodyHTML":"\u003ch1\u003eHV000 — fdw_error（外部数据包装器错误）\u003c/h1\u003e\n\u003ch2\u003e速览 {#at-a-glance}\u003c/h2\u003e\n\u003cp\u003e\u003ccode\u003eHV000\u003c/code\u003e 是 SQL/MED 外部数据包装器（FDW）的通用错误条件，只说明错误位于 FDW 边界，不对应某一种远端故障、回调或重试策略。PostgreSQL 18.6 核心/contrib 扫描没有解析出直接的 \u003ccode\u003eERRCODE_FDW_ERROR\u003c/code\u003e 报告组，具体触发方式取决于安装的实现。\u003c/p\u003e\n\u003cp\u003e包装器回调可以报告自己的 SQLSTATE，访问另一系统的包装器也可能转发远端诊断。解释 \u003ccode\u003eHV000\u003c/code\u003e 前，应保留完整诊断、外部表、外部服务器、包装器名称与版本以及操作阶段。\u003c/p\u003e\n\u003ch2\u003e含义与范围 {#meaning}\u003c/h2\u003e\n\u003cp\u003e18.6 定义为 SQL/MED 专用 Class HV 中的 \u003ccode\u003eHV000 E ERRCODE_FDW_ERROR fdw_error\u003c/code\u003e。FDW API 提供规划、扫描、修改、导入和解释回调；执行器通过安装的包装器提供的 FDW routine 调用这些回调。条件集中定义而具体实现位于扩展，正是这个边界的结果。\u003c/p\u003e\n\u003cp\u003e\u003ccode\u003epostgres_fdw\u003c/code\u003e、\u003ccode\u003efile_fdw\u003c/code\u003e 和第三方 FDW 实现 FDW 回调 API。dblink 是独立的 contrib 客户端 API，访问另一 PostgreSQL 服务器时也可能使用 Class HV 代码，但它不是 FDW 回调实现。远端 SQLSTATE、libpq 连接错误和包装器本地错误可能出现在一次操作中，但不能互相替代。\u003c/p\u003e\n\u003ch2\u003e报文与诊断 {#messages}\u003c/h2\u003e\n\u003cp\u003e归档的 18.6 调用扫描没有解析出 \u003ccode\u003eHV000\u003c/code\u003e 的稳定核心报文变体。尽可能保留 \u003ccode\u003eC\u003c/code\u003e/SQLSTATE、\u003ccode\u003eS\u003c/code\u003e、\u003ccode\u003eV\u003c/code\u003e、\u003ccode\u003eM\u003c/code\u003e、\u003ccode\u003eD\u003c/code\u003e、\u003ccode\u003eH\u003c/code\u003e、\u003ccode\u003eW\u003c/code\u003e、\u003ccode\u003eF\u003c/code\u003e、\u003ccode\u003eL\u003c/code\u003e、\u003ccode\u003eR\u003c/code\u003e，以及包装器回调或远端命令；不能用“FDW error”概括实际报文。\u003c/p\u003e\n\u003ch2\u003e诊断 {#diagnosis}\u003c/h2\u003e\n\u003cp\u003e先确定阶段：规划、扫描初始化、取数、增删改、提交/回滚、模式导入或 \u003ccode\u003eEXPLAIN\u003c/code\u003e。再检查外部表和服务器选项、用户映射、包装器版本及远端日志。若是远端 PostgreSQL 包装器，要分别记录远端和本地 SQLSTATE；它们描述的是同一故障的不同层。\u003c/p\u003e\n\u003cp\u003e本次扫描覆盖 PostgreSQL 18.6 核心及自带 contrib 源码，不覆盖所有外部包装器、驱动、远端数据库或用户回调。\u003c/p\u003e\n\u003ch2\u003e处理 {#response}\u003c/h2\u003e\n\u003cp\u003e根据已确认的层次修复外部服务器或用户映射、包装器选项/回调契约、远端操作，或安装兼容的包装器版本。只有确认包装器是否已访问远端以及写操作是否可能提交后才重试；单独的 \u003ccode\u003eHV000\u003c/code\u003e 不能证明这两点。\u003c/p\u003e\n\u003ch2\u003e版本 {#versions}\u003c/h2\u003e\n\u003cp\u003e锁定目录在 9.1.0 已观察到 \u003ccode\u003eHV000\u003c/code\u003e，并存在于截至 18.6 的正式快照及 19 Beta 3 预览快照。pre-9 扫描的 7.4–8.4 定义文件未观察到它，这只是资料边界，不是精确引入版本。\u003c/p\u003e\n\u003ch2\u003e相关 {#related}\u003c/h2\u003e\n\u003cp\u003e比较 \u003ca href=\"/wiki/sqlstate/HV001/\" rel=\"nofollow\"\u003e\u003ccode\u003eHV001\u003c/code\u003e — \u003ccode\u003efdw_out_of_memory\u003c/code\u003e\u003c/a\u003e、\u003ca href=\"/wiki/sqlstate/HV002/\" rel=\"nofollow\"\u003e\u003ccode\u003eHV002\u003c/code\u003e — \u003ccode\u003efdw_dynamic_parameter_value_needed\u003c/code\u003e\u003c/a\u003e 和 \u003ca href=\"/wiki/sqlstate/HV00B/\" rel=\"nofollow\"\u003e\u003ccode\u003eHV00B\u003c/code\u003e — \u003ccode\u003efdw_invalid_handle\u003c/code\u003e\u003c/a\u003e。远端条件应按远端系统的 SQLSTATE 和诊断解释。\u003c/p\u003e\n\u003ch2\u003e来源 {#sources}\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/utils/errcodes.txt#L456-L477\" rel=\"nofollow\"\u003e\u003ccode\u003eerrcodes.txt\u003c/code\u003e\u003c/a\u003e — 18.6 固定定义，SHA-256 \u003ccode\u003e6e8de346643ba84aa3c9c6a73360acfc7b2dfb89162c06c08ce9bf5bcd5bbcba\u003c/code\u003e。\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/include/foreign/fdwapi.h#L24-L55\" rel=\"nofollow\"\u003e\u003ccode\u003efdwapi.h\u003c/code\u003e\u003c/a\u003e — 回调边界。\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/executor/nodeForeignscan.c#L40-L70\" rel=\"nofollow\"\u003e\u003ccode\u003enodeForeignscan.c\u003c/code\u003e\u003c/a\u003e — 执行器回调分发。\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#sources\" rel=\"nofollow\"\u003e结构化证据\u003c/a\u003e — 固定来源和有界调用扫描结果。\u003c/li\u003e\n\u003c/ul\u003e\n","SourceRevision":"english-manuals:955864d2bb9680d4dc0dc21453a0cdf05cc4bb860ca9ae74b50ede8b0a1393a4","ContentHash":"21d8678e08b00a2ac55e3ccad29789d733cf8f6ec67a1fc92e0a212b518a7da6","Payload":{"body_md":"# HV000 — fdw_error（外部数据包装器错误）\n\n## 速览 {#at-a-glance}\n\n`HV000` 是 SQL/MED 外部数据包装器（FDW）的通用错误条件，只说明错误位于 FDW 边界，不对应某一种远端故障、回调或重试策略。PostgreSQL 18.6 核心/contrib 扫描没有解析出直接的 `ERRCODE_FDW_ERROR` 报告组，具体触发方式取决于安装的实现。\n\n包装器回调可以报告自己的 SQLSTATE，访问另一系统的包装器也可能转发远端诊断。解释 `HV000` 前，应保留完整诊断、外部表、外部服务器、包装器名称与版本以及操作阶段。\n\n\n## 含义与范围 {#meaning}\n\n18.6 定义为 SQL/MED 专用 Class HV 中的 `HV000 E ERRCODE_FDW_ERROR fdw_error`。FDW API 提供规划、扫描、修改、导入和解释回调；执行器通过安装的包装器提供的 FDW routine 调用这些回调。条件集中定义而具体实现位于扩展，正是这个边界的结果。\n\n`postgres_fdw`、`file_fdw` 和第三方 FDW 实现 FDW 回调 API。dblink 是独立的 contrib 客户端 API，访问另一 PostgreSQL 服务器时也可能使用 Class HV 代码，但它不是 FDW 回调实现。远端 SQLSTATE、libpq 连接错误和包装器本地错误可能出现在一次操作中，但不能互相替代。\n\n## 报文与诊断 {#messages}\n\n归档的 18.6 调用扫描没有解析出 `HV000` 的稳定核心报文变体。尽可能保留 `C`/SQLSTATE、`S`、`V`、`M`、`D`、`H`、`W`、`F`、`L`、`R`，以及包装器回调或远端命令；不能用“FDW error”概括实际报文。\n\n## 诊断 {#diagnosis}\n\n先确定阶段：规划、扫描初始化、取数、增删改、提交/回滚、模式导入或 `EXPLAIN`。再检查外部表和服务器选项、用户映射、包装器版本及远端日志。若是远端 PostgreSQL 包装器，要分别记录远端和本地 SQLSTATE；它们描述的是同一故障的不同层。\n\n本次扫描覆盖 PostgreSQL 18.6 核心及自带 contrib 源码，不覆盖所有外部包装器、驱动、远端数据库或用户回调。\n\n## 处理 {#response}\n\n根据已确认的层次修复外部服务器或用户映射、包装器选项/回调契约、远端操作，或安装兼容的包装器版本。只有确认包装器是否已访问远端以及写操作是否可能提交后才重试；单独的 `HV000` 不能证明这两点。\n\n## 版本 {#versions}\n\n锁定目录在 9.1.0 已观察到 `HV000`，并存在于截至 18.6 的正式快照及 19 Beta 3 预览快照。pre-9 扫描的 7.4–8.4 定义文件未观察到它，这只是资料边界，不是精确引入版本。\n\n## 相关 {#related}\n\n比较 [`HV001` — `fdw_out_of_memory`](/wiki/sqlstate/HV001/)、[`HV002` — `fdw_dynamic_parameter_value_needed`](/wiki/sqlstate/HV002/) 和 [`HV00B` — `fdw_invalid_handle`](/wiki/sqlstate/HV00B/)。远端条件应按远端系统的 SQLSTATE 和诊断解释。\n\n## 来源 {#sources}\n\n- [`errcodes.txt`](https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/utils/errcodes.txt#L456-L477) — 18.6 固定定义，SHA-256 `6e8de346643ba84aa3c9c6a73360acfc7b2dfb89162c06c08ce9bf5bcd5bbcba`。\n- [`fdwapi.h`](https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/include/foreign/fdwapi.h#L24-L55) — 回调边界。\n- [`nodeForeignscan.c`](https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/executor/nodeForeignscan.c#L40-L70) — 执行器回调分发。\n- [结构化证据](#sources) — 固定来源和有界调用扫描结果。\n","description":"PostgreSQL SQLSTATE HV000 是 SQL/MED 外部数据包装器的通用错误条件。应先确认包装器回调和远端诊断，再决定恢复方式。","is_stale":false,"name":"外部数据包装器错误","sections":[{"anchor":"","heading":"","html":"\u0026lt;h1\u0026gt;HV000 — fdw_error（外部数据包装器错误）\u0026lt;/h1\u0026gt;"},{"anchor":"at-a-glance","heading":"速览","html":"\u003cp\u003e\u003ccode\u003eHV000\u003c/code\u003e 是 SQL/MED 外部数据包装器（FDW）的通用错误条件，只说明错误位于 FDW 边界，不对应某一种远端故障、回调或重试策略。PostgreSQL 18.6 核心/contrib 扫描没有解析出直接的 \u003ccode\u003eERRCODE_FDW_ERROR\u003c/code\u003e 报告组，具体触发方式取决于安装的实现。\u003c/p\u003e\n\u003cp\u003e包装器回调可以报告自己的 SQLSTATE，访问另一系统的包装器也可能转发远端诊断。解释 \u003ccode\u003eHV000\u003c/code\u003e 前，应保留完整诊断、外部表、外部服务器、包装器名称与版本以及操作阶段。\u003c/p\u003e"},{"anchor":"meaning","heading":"含义与范围","html":"\u003cp\u003e18.6 定义为 SQL/MED 专用 Class HV 中的 \u003ccode\u003eHV000 E ERRCODE_FDW_ERROR fdw_error\u003c/code\u003e。FDW API 提供规划、扫描、修改、导入和解释回调；执行器通过安装的包装器提供的 FDW routine 调用这些回调。条件集中定义而具体实现位于扩展，正是这个边界的结果。\u003c/p\u003e\n\u003cp\u003e\u003ccode\u003epostgres_fdw\u003c/code\u003e、\u003ccode\u003efile_fdw\u003c/code\u003e 和第三方 FDW 实现 FDW 回调 API。dblink 是独立的 contrib 客户端 API，访问另一 PostgreSQL 服务器时也可能使用 Class HV 代码，但它不是 FDW 回调实现。远端 SQLSTATE、libpq 连接错误和包装器本地错误可能出现在一次操作中，但不能互相替代。\u003c/p\u003e"},{"anchor":"messages","heading":"报文与诊断","html":"\u003cp\u003e归档的 18.6 调用扫描没有解析出 \u003ccode\u003eHV000\u003c/code\u003e 的稳定核心报文变体。尽可能保留 \u003ccode\u003eC\u003c/code\u003e/SQLSTATE、\u003ccode\u003eS\u003c/code\u003e、\u003ccode\u003eV\u003c/code\u003e、\u003ccode\u003eM\u003c/code\u003e、\u003ccode\u003eD\u003c/code\u003e、\u003ccode\u003eH\u003c/code\u003e、\u003ccode\u003eW\u003c/code\u003e、\u003ccode\u003eF\u003c/code\u003e、\u003ccode\u003eL\u003c/code\u003e、\u003ccode\u003eR\u003c/code\u003e，以及包装器回调或远端命令；不能用“FDW error”概括实际报文。\u003c/p\u003e"},{"anchor":"diagnosis","heading":"诊断","html":"\u003cp\u003e先确定阶段：规划、扫描初始化、取数、增删改、提交/回滚、模式导入或 \u003ccode\u003eEXPLAIN\u003c/code\u003e。再检查外部表和服务器选项、用户映射、包装器版本及远端日志。若是远端 PostgreSQL 包装器，要分别记录远端和本地 SQLSTATE；它们描述的是同一故障的不同层。\u003c/p\u003e\n\u003cp\u003e本次扫描覆盖 PostgreSQL 18.6 核心及自带 contrib 源码，不覆盖所有外部包装器、驱动、远端数据库或用户回调。\u003c/p\u003e"},{"anchor":"response","heading":"处理","html":"\u003cp\u003e根据已确认的层次修复外部服务器或用户映射、包装器选项/回调契约、远端操作，或安装兼容的包装器版本。只有确认包装器是否已访问远端以及写操作是否可能提交后才重试；单独的 \u003ccode\u003eHV000\u003c/code\u003e 不能证明这两点。\u003c/p\u003e"},{"anchor":"versions","heading":"版本","html":"\u003cp\u003e锁定目录在 9.1.0 已观察到 \u003ccode\u003eHV000\u003c/code\u003e，并存在于截至 18.6 的正式快照及 19 Beta 3 预览快照。pre-9 扫描的 7.4–8.4 定义文件未观察到它，这只是资料边界，不是精确引入版本。\u003c/p\u003e"},{"anchor":"related","heading":"相关","html":"\u003cp\u003e比较 \u003ca href=\"/wiki/sqlstate/HV001/\"\u003e\u003ccode\u003eHV001\u003c/code\u003e — \u003ccode\u003efdw_out_of_memory\u003c/code\u003e\u003c/a\u003e、\u003ca href=\"/wiki/sqlstate/HV002/\"\u003e\u003ccode\u003eHV002\u003c/code\u003e — \u003ccode\u003efdw_dynamic_parameter_value_needed\u003c/code\u003e\u003c/a\u003e 和 \u003ca href=\"/wiki/sqlstate/HV00B/\"\u003e\u003ccode\u003eHV00B\u003c/code\u003e — \u003ccode\u003efdw_invalid_handle\u003c/code\u003e\u003c/a\u003e。远端条件应按远端系统的 SQLSTATE 和诊断解释。\u003c/p\u003e"},{"anchor":"sources","heading":"来源","html":"\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/utils/errcodes.txt#L456-L477\"\u003e\u003ccode\u003eerrcodes.txt\u003c/code\u003e\u003c/a\u003e — 18.6 固定定义，SHA-256 \u003ccode\u003e6e8de346643ba84aa3c9c6a73360acfc7b2dfb89162c06c08ce9bf5bcd5bbcba\u003c/code\u003e。\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/include/foreign/fdwapi.h#L24-L55\"\u003e\u003ccode\u003efdwapi.h\u003c/code\u003e\u003c/a\u003e — 回调边界。\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/executor/nodeForeignscan.c#L40-L70\"\u003e\u003ccode\u003enodeForeignscan.c\u003c/code\u003e\u003c/a\u003e — 执行器回调分发。\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#sources\"\u003e结构化证据\u003c/a\u003e — 固定来源和有界调用扫描结果。\u003c/li\u003e\n\u003c/ul\u003e"}],"summary":"外部数据包装器的通用错误，需看包装器诊断。","title":"HV000 — fdw_error（外部数据包装器错误）","translation_source_rev":"2b5fd09742da60dca2bb9bce22d82335740702221fa0340b43b9c2d290be9be7"}},"RequestedLocale":"zh-Hans","Fallback":false,"Versions":["10","11","12","13","14","15","16","17","18","19","20","9.1","9.2","9.3","9.4","9.5","9.6"],"Locales":["en","zh-Hans"],"Signatures":null,"Spellings":null,"SQLState":{"aliases":[],"catalogue_notes":{"earliest_observed":"9.1.0","formal_scope":"9.0.0..18.6","latest_observed":"18.6","matrix_scope":["9.0.23","9.1.24","9.2.24","9.3.25","9.4.26","9.5.25","9.6.24","10.23","11.22","12.22","13.23","14.24","15.19","16.15","17.11","18.6"],"pre9_scope":{"formal_tag_count":191,"maximum_release":"8.4.22","minimum_release":"7.0.0","source_definition_count":153,"source_doc_count":153,"source_file_count":306,"source_scope":"7.4..8.4 definition files; 7.0..7.3 candidate-path source gap probes","source_tag_count":153},"pre9_status":"not_observed","preview_scope":["19beta3"]},"class":"HV","class_name":"Foreign Data Wrapper Error 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