{"Entry":{"collection":"sqlstate","key":"08P01","name":"08P01","aliases":[],"metadata":{"aliases":[],"case_count":1,"class_code":"08","condition_name":"protocol_violation","condition_names":["protocol_violation"],"content_hash":"993a102da18e455204ed243b2d2615c3dc6de79074be4a959d0b771ac5bc0fea","depth":"full","editorial_review":"reviewed","evidence_tier":"observed_runtime","imported_at":"2026-09-30T17:45:26.720356+08:00","introduced":null,"known_present_by":"7.4","macros":["ERRCODE_PROTOCOL_VIOLATION"],"name_zh":"协议违规","present_in":["9.0","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_PROTOCOL_VIOLATION","removed":null,"runtime_verification":"passed","severity_classes":["E"],"snippet_count":1,"source_rev":"english-manuals:cff3edb58e3a5379935f38c2fa5b82c967b8abd9d6a2f638625ec62be8b27d48","sqlstate":"08P01","status":"active","summary_zh":"前后端消息违反线路协议，通常是 FATAL。"}},"Definition":{"Collection":"sqlstate","Key":"08P01","SourceDatabase":"center","Version":"18","SourceTable":"sqlstate","SourceKey":"08P01","SourceRevision":"english-manuals:cff3edb58e3a5379935f38c2fa5b82c967b8abd9d6a2f638625ec62be8b27d48","Facts":{"aliases":[],"class_name":"Connection Exception","condition_name":"protocol_violation","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"56dacf78e618ff0fd8c533e05db597b80d7ebbad7f8e512a888217d0640aa328","slug":"18"},"lang":"en","sqlstate":"08P01"},"ManualEvidence":{"doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"56dacf78e618ff0fd8c533e05db597b80d7ebbad7f8e512a888217d0640aa328","slug":"18"}},"MeasuredEvidence":{}},"Text":{"Collection":"sqlstate","Key":"08P01","SourceDatabase":"center","Version":"","Locale":"zh-Hans","Title":"08P01 — 协议违规（protocol_violation）","Summary":"前后端消息违反线路协议，通常是 FATAL。","BodyHTML":"\u003ch1\u003e08P01 — 协议违规\u003c/h1\u003e\n\u003ch2\u003e速览 {#at-a-glance}\u003c/h2\u003e\n\u003cp\u003eSQLSTATE \u003ccode\u003e08P01\u003c/code\u003e 是 Class \u003ccode\u003e08\u003c/code\u003e 中的 \u003cstrong\u003eprotocol_violation\u003c/strong\u003e。\u003ccode\u003e08P01\u003c/code\u003e 表示前端/后端消息违反线路协议。选定原始 TCP 案例先完成启动并观察 ReadyForQuery（\u003ccode\u003eZ\u003c/code\u003e），再在合法帧中发送未知前端字节 \u003ccode\u003eY\u003c/code\u003e，收到 C=\u003ccode\u003e08P01\u003c/code\u003e、S=\u003ccode\u003eFATAL\u003c/code\u003e、主报文 \u003ccode\u003einvalid frontend message type 89\u003c/code\u003e，并在客户端关闭 socket 前读到服务器 EOF。\u003c/p\u003e\n\u003ch2\u003e含义 {#meaning}\u003c/h2\u003e\n\u003cp\u003e服务器协议解析器先接受启动交换，随后在派发 SQL 前拒绝未知的前端消息类型。选定路径为 FATAL \u003ccode\u003einvalid frontend message type 89\u003c/code\u003e，之后服务器发送 EOF；因此它是受影响 socket 的同步边界，不是 SQL 解析错误。\u003c/p\u003e\n\u003cp\u003e关键边界在于线路状态，而不是 SQL 文本。客户端可以已经到达 \u003ccode\u003eReadyForQuery\u003c/code\u003e，却在下一条消息中发送错误类型，选定案例正是如此；启动帧损坏或代理改变帧边界也可能更早失败，并且可能没有可用会话。选定运行覆盖未知消息分派分支；下面的固定源码证据还覆盖不同的 Bind 和 message-buffer 解析分支，其他传输故障必须依据自身的 ErrorResponse 或日志判断。\u003c/p\u003e\n\u003cp\u003e\u003ccode\u003e08P01\u003c/code\u003e 并不意味着固定的严重级别或 socket 结果。在固定的 extended-query 路径中，Bind 消息的 parameter-format 数量或参数数量不匹配时报告 \u003ccode\u003eERROR\u003c/code\u003e；顶层循环中止当前命令，等待协议规定的 \u003ccode\u003eSync\u003c/code\u003e，然后才继续下一个 \u003ccode\u003eReadyForQuery\u003c/code\u003e。固定的 message-buffer 读取器在缺少字节、字符串无效或报文尾部有数据时也使用 \u003ccode\u003eERROR\u003c/code\u003e。这些可恢复的协议错误不同于未知消息类型：后者是 \u003ccode\u003eFATAL\u003c/code\u003e 边界，因为服务器不能再信任消息同步状态。\u003c/p\u003e\n\u003ch2\u003e诊断 {#diagnosis}\u003c/h2\u003e\n\u003cp\u003e检查驱动或代理的协议版本、消息类型、帧长度、启动模式和连接所有权。选定证据中的 \u003ccode\u003ecollector\u003c/code\u003e 是收集原始协议 ErrorResponse（C/S/M 及服务器 EOF）的对象，不是 csvlog/jsonlog。服务器关闭产生 FATAL 的 socket，案例不会复用它；独立的运行器连接能执行 \u003ccode\u003eSELECT 1\u003c/code\u003e 并保持 \u003ccode\u003eIDLE\u003c/code\u003e。这是线路协议边界，不是 SQL 语法，也不是客户端自行创建的 SQLSTATE。\u003c/p\u003e\n\u003cp\u003e按阶段解释恢复：\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003e启动完成前没有会话级事务，驱动可能只有连接异常；如果服务器发过响应，应保留原始线路记录。\u003c/li\u003e\n\u003cli\u003e启动到达 \u003ccode\u003eZ\u003c/code\u003e 后，未知前端消息会在已建立后端中被拒绝，但选定分支是 \u003ccode\u003eFATAL\u003c/code\u003e，随后服务器关闭该 socket。即使客户端在协议失步前已经开始工作，也不能在这个 socket 上发送 \u003ccode\u003eROLLBACK\u003c/code\u003e。\u003c/li\u003e\n\u003cli\u003e经过连接池或代理时，要比较所有者实际发送的字节与服务器期望的协议版本和帧格式。另一条连接上的 \u003ccode\u003eSELECT 1\u003c/code\u003e 只证明可达，不证明在途请求已经提交。\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp\u003e先根据主报文识别分支，再选择恢复动作。\u003ccode\u003ebind message has ... parameter formats\u003c/code\u003e 和 \u003ccode\u003ebind message supplies ... parameters\u003c/code\u003e 指向 extended-query 数量契约；\u003ccode\u003eno data left in message\u003c/code\u003e、\u003ccode\u003einsufficient data left in message\u003c/code\u003e、\u003ccode\u003einvalid string in message\u003c/code\u003e 和 \u003ccode\u003einvalid message format\u003c/code\u003e 指向报文主体或边界损坏。这些源码定义的 \u003ccode\u003eERROR\u003c/code\u003e 变体在驱动仍能保持帧边界时可能通过 \u003ccode\u003eSync\u003c/code\u003e 恢复；带 \u003ccode\u003eFATAL\u003c/code\u003e 的 \u003ccode\u003einvalid frontend message type ...\u003c/code\u003e 则表示选定 socket 已经失效。\u003c/p\u003e\n\u003ch2\u003e处理 {#response}\u003c/h2\u003e\n\u003cp\u003e收到 \u003ccode\u003eFATAL\u003c/code\u003e 或服务器 EOF 时，关闭并丢弃受影响的 socket，修正协议或代理帧后重新连接。extended-query 的 \u003ccode\u003eERROR\u003c/code\u003e 应让驱动发送协议有效的 \u003ccode\u003eSync\u003c/code\u003e 并等待 \u003ccode\u003eReadyForQuery\u003c/code\u003e，然后检查事务状态；\u003ccode\u003eSync\u003c/code\u003e 不会回滚失败的显式事务，状态为 \u003ccode\u003eE\u003c/code\u003e 时仍须执行 \u003ccode\u003eROLLBACK\u003c/code\u003e 或回到有意建立的保存点。若非幂等请求在途中，重放前先核对结果。独立探针只证明新连接可用。\u003c/p\u003e\n\u003cp\u003e将选定案例视为会话终止分支：读到服务器 EOF 后建立新连接，并且只重做已核对且具幂等性的操作。如果违规发生在会话建立前，应先修正启动或代理配置。只有客户端解析器异常或 socket 关闭而没有服务器 \u003ccode\u003eC\u003c/code\u003e 字段，不能把事件标成 \u003ccode\u003e08P01\u003c/code\u003e。\u003c/p\u003e\n\u003cp\u003e不要自行拼接字节，也不要把事务当作已经提交。若驱动无法保持报文边界或不实现 Sync 契约，应丢弃连接并核对请求结果。这一源码流程不改变选定未知字节运行：该案例的 \u003ccode\u003eFATAL\u003c/code\u003e socket 必须丢弃。\u003c/p\u003e\n\u003ch2\u003e报文 {#messages}\u003c/h2\u003e\n\u003cp\u003e固定的协议解析路径以 \u003ccode\u003eFATAL\u003c/code\u003e 发出主报文 \u003ccode\u003einvalid frontend message type %d\u003c/code\u003e，其中字节数值是动态的。选定的 \u003ccode\u003eY\u003c/code\u003e 字节记录为 \u003ccode\u003e89\u003c/code\u003e。SQLSTATE 的依据是原始 ErrorResponse，而不是客户端异常。\u003c/p\u003e\n\u003cp\u003e其他固定源码分支以 \u003ccode\u003eERROR\u003c/code\u003e 发出以下主报文模板：\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ccode\u003ebind message has %d parameter formats but %d parameters\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003ebind message supplies %d parameters, but prepared statement \u0026#34;%s\u0026#34; requires %d\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003eno data left in message\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003einsufficient data left in message\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003einvalid string in message\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003einvalid message format\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp\u003e这些 Bind 和 message-buffer 变体在本页中是源码证据，不是新增运行观察，也不会全部终止 socket。\u003c/p\u003e\n\u003cp\u003e选定的线路顺序是：启动交换 → \u003ccode\u003eZ\u003c/code\u003e ReadyForQuery → 合法帧中的类型字节 \u003ccode\u003eY\u003c/code\u003e（十进制 \u003ccode\u003e89\u003c/code\u003e）→ ErrorResponse \u003ccode\u003eC=08P01\u003c/code\u003e、\u003ccode\u003eS=FATAL\u003c/code\u003e、\u003ccode\u003eM=invalid frontend message type 89\u003c/code\u003e → 服务器 EOF。collector 直接收集这些协议字段和 EOF，既不是 csvlog/jsonlog 记录，也不是后续独立探针。\u003c/p\u003e\n\u003ch2\u003e代表案例 {#case}\u003c/h2\u003e\n\u003cp\u003eSQL 探针用于检查独立连接。真实触发是运行器拥有的 TCP 握手后发送未知前端消息字节，不能只用 SQL 表达。\u003c/p\u003e\n\u003cpre\u003e\u003ccode\u003eSELECT 1;\n\u003c/code\u003e\u003c/pre\u003e\n\u003cp\u003e18.6 服务器记录为 C=\u003ccode\u003e08P01\u003c/code\u003e、S=\u003ccode\u003eFATAL\u003c/code\u003e、主报文 \u003ccode\u003einvalid frontend message type 89\u003c/code\u003e；启动到达 \u003ccode\u003eZ\u003c/code\u003e，服务器 EOF 断言为 \u003ccode\u003eTrue\u003c/code\u003e，独立探针返回 \u003ccode\u003e1\u003c/code\u003e，状态 \u003ccode\u003eIDLE\u003c/code\u003e。因此没有复用触发错误的连接。\u003c/p\u003e\n\u003cp\u003e可下载的案例与证据投影分别是 \u003ca href=\"#cases\" rel=\"nofollow\"\u003e\u003ccode\u003e08P01 案例 JSON\u003c/code\u003e\u003c/a\u003e 和 \u003ca href=\"#sources\" rel=\"nofollow\"\u003e\u003ccode\u003e作者证据\u003c/code\u003e\u003c/a\u003e。运行器清单为 \u003ccode\u003everify/cases/08P01/cases.json\u003c/code\u003e；发布前会将页面 SQL 与共享注册表比对。\u003c/p\u003e\n\u003ch2\u003e版本 {#versions}\u003c/h2\u003e\n\u003cp\u003e上面的生成事实表记录锁定的目录快照和最早观察到的定义。本页自然运行范围是 PostgreSQL 18.6 与 10.21，不能据此推断所有中间版本的行为。\u003c/p\u003e\n\u003ch2\u003e相关 {#related}\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"/wiki/sqlstate/08001/\" rel=\"nofollow\"\u003e\u003ccode\u003e08001\u003c/code\u003e — sqlclient_unable_to_establish_sqlconnection\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"/wiki/sqlstate/28000/\" rel=\"nofollow\"\u003e\u003ccode\u003e28000\u003c/code\u003e — invalid_authorization_specification\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003ch2\u003e来源 {#sources}\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ccode\u003esrc.protocol-invalid-frontend.18.6\u003c/code\u003e — \u003ccode\u003esrc/backend/tcop/postgres.c\u003c/code\u003e at \u003ccode\u003eREL_18_6\u003c/code\u003e commit \u003ccode\u003e724edf9bde9d356724ad384a2e196edc3c9f80f7\u003c/code\u003e; fixed blob SHA-256 \u003ccode\u003e9fb62275b1badf94d01ab351337b60410cd9b3ab1fe63fa9f23d6d2185a21061\u003c/code\u003e (\u003ca href=\"https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/tcop/postgres.c#L454-L456\" rel=\"nofollow\"\u003esource\u003c/a\u003e).\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003esrc.protocol-invalid-frontend.10.23\u003c/code\u003e — \u003ccode\u003esrc/backend/tcop/postgres.c\u003c/code\u003e at \u003ccode\u003eREL_10_23\u003c/code\u003e commit \u003ccode\u003e02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4\u003c/code\u003e; fixed blob SHA-256 \u003ccode\u003ebadfe30749794afa80a799dcdbd142fd4e4732ac1c913002d365549ae5313497\u003c/code\u003e (\u003ca href=\"https://github.com/postgres/postgres/blob/02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4/src/backend/tcop/postgres.c#L430-L432\" rel=\"nofollow\"\u003esource\u003c/a\u003e).\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003esrc.postgres-bind.10.23\u003c/code\u003e — \u003ccode\u003esrc/backend/tcop/postgres.c\u003c/code\u003e at \u003ccode\u003eREL_10_23\u003c/code\u003e commit \u003ccode\u003e02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4\u003c/code\u003e; fixed blob SHA-256 \u003ccode\u003ebadfe30749794afa80a799dcdbd142fd4e4732ac1c913002d365549ae5313497\u003c/code\u003e (\u003ca href=\"https://github.com/postgres/postgres/blob/02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4/src/backend/tcop/postgres.c#L1483-L1580\" rel=\"nofollow\"\u003esource\u003c/a\u003e).\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003esrc.pqformat.10.23\u003c/code\u003e — \u003ccode\u003esrc/backend/libpq/pqformat.c\u003c/code\u003e at \u003ccode\u003eREL_10_23\u003c/code\u003e commit \u003ccode\u003e02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4\u003c/code\u003e; fixed blob SHA-256 \u003ccode\u003e637923dbf2b9d9a0610350784f3b1d7d36a545cd8a6bd2cbe6272d9549873a91\u003c/code\u003e (\u003ca href=\"https://github.com/postgres/postgres/blob/02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4/src/backend/libpq/pqformat.c#L432-L682\" rel=\"nofollow\"\u003esource\u003c/a\u003e).\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003esrc.postgres-sync.10.23\u003c/code\u003e — \u003ccode\u003esrc/backend/tcop/postgres.c\u003c/code\u003e at \u003ccode\u003eREL_10_23\u003c/code\u003e commit \u003ccode\u003e02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4\u003c/code\u003e; fixed blob SHA-256 \u003ccode\u003ebadfe30749794afa80a799dcdbd142fd4e4732ac1c913002d365549ae5313497\u003c/code\u003e (\u003ca href=\"https://github.com/postgres/postgres/blob/02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4/src/backend/tcop/postgres.c#L3863-L3980\" rel=\"nofollow\"\u003esource\u003c/a\u003e).\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003esrc.calls.REL_18_6\u003c/code\u003e / \u003ccode\u003esrc.calls.REL_10_23\u003c/code\u003e — fixed local call scans, SHA-256 \u003ccode\u003e9ee8a0e81d8f0825c5c1ae45583439859a26e602bdd4ce2f2a62aa278867ccbf\u003c/code\u003e / \u003ccode\u003e00d16d3eb01b71ccf1b245c8f3102f9d0ec9f36fb02777b8dd1b99fcb263040c\u003c/code\u003e; these scans preserve the resolved call context used by the claims.\u003c/li\u003e\n\u003c/ul\u003e\n","SourceRevision":"english-manuals:cff3edb58e3a5379935f38c2fa5b82c967b8abd9d6a2f638625ec62be8b27d48","ContentHash":"5890ca233f61ccba1a1c86a7c5e445c7b19a55538bf8ffef11947bf18377c6b8","Payload":{"body_md":"# 08P01 — 协议违规\n\n## 速览 {#at-a-glance}\n\nSQLSTATE `08P01` 是 Class `08` 中的 **protocol_violation**。`08P01` 表示前端/后端消息违反线路协议。选定原始 TCP 案例先完成启动并观察 ReadyForQuery（`Z`），再在合法帧中发送未知前端字节 `Y`，收到 C=`08P01`、S=`FATAL`、主报文 `invalid frontend message type 89`，并在客户端关闭 socket 前读到服务器 EOF。\n\n\n## 含义 {#meaning}\n\n服务器协议解析器先接受启动交换，随后在派发 SQL 前拒绝未知的前端消息类型。选定路径为 FATAL `invalid frontend message type 89`，之后服务器发送 EOF；因此它是受影响 socket 的同步边界，不是 SQL 解析错误。\n\n关键边界在于线路状态，而不是 SQL 文本。客户端可以已经到达 `ReadyForQuery`，却在下一条消息中发送错误类型，选定案例正是如此；启动帧损坏或代理改变帧边界也可能更早失败，并且可能没有可用会话。选定运行覆盖未知消息分派分支；下面的固定源码证据还覆盖不同的 Bind 和 message-buffer 解析分支，其他传输故障必须依据自身的 ErrorResponse 或日志判断。\n\n`08P01` 并不意味着固定的严重级别或 socket 结果。在固定的 extended-query 路径中，Bind 消息的 parameter-format 数量或参数数量不匹配时报告 `ERROR`；顶层循环中止当前命令，等待协议规定的 `Sync`，然后才继续下一个 `ReadyForQuery`。固定的 message-buffer 读取器在缺少字节、字符串无效或报文尾部有数据时也使用 `ERROR`。这些可恢复的协议错误不同于未知消息类型：后者是 `FATAL` 边界，因为服务器不能再信任消息同步状态。\n\n## 诊断 {#diagnosis}\n\n检查驱动或代理的协议版本、消息类型、帧长度、启动模式和连接所有权。选定证据中的 `collector` 是收集原始协议 ErrorResponse（C/S/M 及服务器 EOF）的对象，不是 csvlog/jsonlog。服务器关闭产生 FATAL 的 socket，案例不会复用它；独立的运行器连接能执行 `SELECT 1` 并保持 `IDLE`。这是线路协议边界，不是 SQL 语法，也不是客户端自行创建的 SQLSTATE。\n\n按阶段解释恢复：\n\n- 启动完成前没有会话级事务，驱动可能只有连接异常；如果服务器发过响应，应保留原始线路记录。\n- 启动到达 `Z` 后，未知前端消息会在已建立后端中被拒绝，但选定分支是 `FATAL`，随后服务器关闭该 socket。即使客户端在协议失步前已经开始工作，也不能在这个 socket 上发送 `ROLLBACK`。\n- 经过连接池或代理时，要比较所有者实际发送的字节与服务器期望的协议版本和帧格式。另一条连接上的 `SELECT 1` 只证明可达，不证明在途请求已经提交。\n\n先根据主报文识别分支，再选择恢复动作。`bind message has ... parameter formats` 和 `bind message supplies ... parameters` 指向 extended-query 数量契约；`no data left in message`、`insufficient data left in message`、`invalid string in message` 和 `invalid message format` 指向报文主体或边界损坏。这些源码定义的 `ERROR` 变体在驱动仍能保持帧边界时可能通过 `Sync` 恢复；带 `FATAL` 的 `invalid frontend message type ...` 则表示选定 socket 已经失效。\n\n## 处理 {#response}\n\n收到 `FATAL` 或服务器 EOF 时，关闭并丢弃受影响的 socket，修正协议或代理帧后重新连接。extended-query 的 `ERROR` 应让驱动发送协议有效的 `Sync` 并等待 `ReadyForQuery`，然后检查事务状态；`Sync` 不会回滚失败的显式事务，状态为 `E` 时仍须执行 `ROLLBACK` 或回到有意建立的保存点。若非幂等请求在途中，重放前先核对结果。独立探针只证明新连接可用。\n\n将选定案例视为会话终止分支：读到服务器 EOF 后建立新连接，并且只重做已核对且具幂等性的操作。如果违规发生在会话建立前，应先修正启动或代理配置。只有客户端解析器异常或 socket 关闭而没有服务器 `C` 字段，不能把事件标成 `08P01`。\n\n不要自行拼接字节，也不要把事务当作已经提交。若驱动无法保持报文边界或不实现 Sync 契约，应丢弃连接并核对请求结果。这一源码流程不改变选定未知字节运行：该案例的 `FATAL` socket 必须丢弃。\n\n## 报文 {#messages}\n\n固定的协议解析路径以 `FATAL` 发出主报文 `invalid frontend message type %d`，其中字节数值是动态的。选定的 `Y` 字节记录为 `89`。SQLSTATE 的依据是原始 ErrorResponse，而不是客户端异常。\n\n其他固定源码分支以 `ERROR` 发出以下主报文模板：\n\n- `bind message has %d parameter formats but %d parameters`\n- `bind message supplies %d parameters, but prepared statement \"%s\" requires %d`\n- `no data left in message`\n- `insufficient data left in message`\n- `invalid string in message`\n- `invalid message format`\n\n这些 Bind 和 message-buffer 变体在本页中是源码证据，不是新增运行观察，也不会全部终止 socket。\n\n选定的线路顺序是：启动交换 → `Z` ReadyForQuery → 合法帧中的类型字节 `Y`（十进制 `89`）→ ErrorResponse `C=08P01`、`S=FATAL`、`M=invalid frontend message type 89` → 服务器 EOF。collector 直接收集这些协议字段和 EOF，既不是 csvlog/jsonlog 记录，也不是后续独立探针。\n\n## 代表案例 {#case}\n\n\nSQL 探针用于检查独立连接。真实触发是运行器拥有的 TCP 握手后发送未知前端消息字节，不能只用 SQL 表达。\n\n```sql\nSELECT 1;\n```\n\n\n18.6 服务器记录为 C=`08P01`、S=`FATAL`、主报文 `invalid frontend message type 89`；启动到达 `Z`，服务器 EOF 断言为 `True`，独立探针返回 `1`，状态 `IDLE`。因此没有复用触发错误的连接。\n\n可下载的案例与证据投影分别是 [`08P01 案例 JSON`](#cases) 和 [`作者证据`](#sources)。运行器清单为 `verify/cases/08P01/cases.json`；发布前会将页面 SQL 与共享注册表比对。\n\n## 版本 {#versions}\n\n上面的生成事实表记录锁定的目录快照和最早观察到的定义。本页自然运行范围是 PostgreSQL 18.6 与 10.21，不能据此推断所有中间版本的行为。\n\n## 相关 {#related}\n\n- [`08001` — sqlclient_unable_to_establish_sqlconnection](/wiki/sqlstate/08001/)\n- [`28000` — invalid_authorization_specification](/wiki/sqlstate/28000/)\n\n## 来源 {#sources}\n\n- `src.protocol-invalid-frontend.18.6` — `src/backend/tcop/postgres.c` at `REL_18_6` commit `724edf9bde9d356724ad384a2e196edc3c9f80f7`; fixed blob SHA-256 `9fb62275b1badf94d01ab351337b60410cd9b3ab1fe63fa9f23d6d2185a21061` ([source](https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/tcop/postgres.c#L454-L456)).\n- `src.protocol-invalid-frontend.10.23` — `src/backend/tcop/postgres.c` at `REL_10_23` commit `02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4`; fixed blob SHA-256 `badfe30749794afa80a799dcdbd142fd4e4732ac1c913002d365549ae5313497` ([source](https://github.com/postgres/postgres/blob/02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4/src/backend/tcop/postgres.c#L430-L432)).\n- `src.postgres-bind.10.23` — `src/backend/tcop/postgres.c` at `REL_10_23` commit `02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4`; fixed blob SHA-256 `badfe30749794afa80a799dcdbd142fd4e4732ac1c913002d365549ae5313497` ([source](https://github.com/postgres/postgres/blob/02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4/src/backend/tcop/postgres.c#L1483-L1580)).\n- `src.pqformat.10.23` — `src/backend/libpq/pqformat.c` at `REL_10_23` commit `02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4`; fixed blob SHA-256 `637923dbf2b9d9a0610350784f3b1d7d36a545cd8a6bd2cbe6272d9549873a91` ([source](https://github.com/postgres/postgres/blob/02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4/src/backend/libpq/pqformat.c#L432-L682)).\n- `src.postgres-sync.10.23` — `src/backend/tcop/postgres.c` at `REL_10_23` commit `02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4`; fixed blob SHA-256 `badfe30749794afa80a799dcdbd142fd4e4732ac1c913002d365549ae5313497` ([source](https://github.com/postgres/postgres/blob/02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4/src/backend/tcop/postgres.c#L3863-L3980)).\n- `src.calls.REL_18_6` / `src.calls.REL_10_23` — fixed local call scans, SHA-256 `9ee8a0e81d8f0825c5c1ae45583439859a26e602bdd4ce2f2a62aa278867ccbf` / `00d16d3eb01b71ccf1b245c8f3102f9d0ec9f36fb02777b8dd1b99fcb263040c`; these scans preserve the resolved call context used by the claims.\n","description":"PostgreSQL SQLSTATE 08P01（协议违规，protocol_violation）的源码证据、诊断与处理参考。","is_stale":false,"name":"协议违规","sections":[{"anchor":"","heading":"","html":"\u0026lt;h1\u0026gt;08P01 — 协议违规\u0026lt;/h1\u0026gt;"},{"anchor":"at-a-glance","heading":"速览","html":"\u003cp\u003eSQLSTATE \u003ccode\u003e08P01\u003c/code\u003e 是 Class \u003ccode\u003e08\u003c/code\u003e 中的 \u003cstrong\u003eprotocol_violation\u003c/strong\u003e。\u003ccode\u003e08P01\u003c/code\u003e 表示前端/后端消息违反线路协议。选定原始 TCP 案例先完成启动并观察 ReadyForQuery（\u003ccode\u003eZ\u003c/code\u003e），再在合法帧中发送未知前端字节 \u003ccode\u003eY\u003c/code\u003e，收到 C=\u003ccode\u003e08P01\u003c/code\u003e、S=\u003ccode\u003eFATAL\u003c/code\u003e、主报文 \u003ccode\u003einvalid frontend message type 89\u003c/code\u003e，并在客户端关闭 socket 前读到服务器 EOF。\u003c/p\u003e"},{"anchor":"meaning","heading":"含义","html":"\u003cp\u003e服务器协议解析器先接受启动交换，随后在派发 SQL 前拒绝未知的前端消息类型。选定路径为 FATAL \u003ccode\u003einvalid frontend message type 89\u003c/code\u003e，之后服务器发送 EOF；因此它是受影响 socket 的同步边界，不是 SQL 解析错误。\u003c/p\u003e\n\u003cp\u003e关键边界在于线路状态，而不是 SQL 文本。客户端可以已经到达 \u003ccode\u003eReadyForQuery\u003c/code\u003e，却在下一条消息中发送错误类型，选定案例正是如此；启动帧损坏或代理改变帧边界也可能更早失败，并且可能没有可用会话。选定运行覆盖未知消息分派分支；下面的固定源码证据还覆盖不同的 Bind 和 message-buffer 解析分支，其他传输故障必须依据自身的 ErrorResponse 或日志判断。\u003c/p\u003e\n\u003cp\u003e\u003ccode\u003e08P01\u003c/code\u003e 并不意味着固定的严重级别或 socket 结果。在固定的 extended-query 路径中，Bind 消息的 parameter-format 数量或参数数量不匹配时报告 \u003ccode\u003eERROR\u003c/code\u003e；顶层循环中止当前命令，等待协议规定的 \u003ccode\u003eSync\u003c/code\u003e，然后才继续下一个 \u003ccode\u003eReadyForQuery\u003c/code\u003e。固定的 message-buffer 读取器在缺少字节、字符串无效或报文尾部有数据时也使用 \u003ccode\u003eERROR\u003c/code\u003e。这些可恢复的协议错误不同于未知消息类型：后者是 \u003ccode\u003eFATAL\u003c/code\u003e 边界，因为服务器不能再信任消息同步状态。\u003c/p\u003e"},{"anchor":"diagnosis","heading":"诊断","html":"\u003cp\u003e检查驱动或代理的协议版本、消息类型、帧长度、启动模式和连接所有权。选定证据中的 \u003ccode\u003ecollector\u003c/code\u003e 是收集原始协议 ErrorResponse（C/S/M 及服务器 EOF）的对象，不是 csvlog/jsonlog。服务器关闭产生 FATAL 的 socket，案例不会复用它；独立的运行器连接能执行 \u003ccode\u003eSELECT 1\u003c/code\u003e 并保持 \u003ccode\u003eIDLE\u003c/code\u003e。这是线路协议边界，不是 SQL 语法，也不是客户端自行创建的 SQLSTATE。\u003c/p\u003e\n\u003cp\u003e按阶段解释恢复：\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003e启动完成前没有会话级事务，驱动可能只有连接异常；如果服务器发过响应，应保留原始线路记录。\u003c/li\u003e\n\u003cli\u003e启动到达 \u003ccode\u003eZ\u003c/code\u003e 后，未知前端消息会在已建立后端中被拒绝，但选定分支是 \u003ccode\u003eFATAL\u003c/code\u003e，随后服务器关闭该 socket。即使客户端在协议失步前已经开始工作，也不能在这个 socket 上发送 \u003ccode\u003eROLLBACK\u003c/code\u003e。\u003c/li\u003e\n\u003cli\u003e经过连接池或代理时，要比较所有者实际发送的字节与服务器期望的协议版本和帧格式。另一条连接上的 \u003ccode\u003eSELECT 1\u003c/code\u003e 只证明可达，不证明在途请求已经提交。\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp\u003e先根据主报文识别分支，再选择恢复动作。\u003ccode\u003ebind message has ... parameter formats\u003c/code\u003e 和 \u003ccode\u003ebind message supplies ... parameters\u003c/code\u003e 指向 extended-query 数量契约；\u003ccode\u003eno data left in message\u003c/code\u003e、\u003ccode\u003einsufficient data left in message\u003c/code\u003e、\u003ccode\u003einvalid string in message\u003c/code\u003e 和 \u003ccode\u003einvalid message format\u003c/code\u003e 指向报文主体或边界损坏。这些源码定义的 \u003ccode\u003eERROR\u003c/code\u003e 变体在驱动仍能保持帧边界时可能通过 \u003ccode\u003eSync\u003c/code\u003e 恢复；带 \u003ccode\u003eFATAL\u003c/code\u003e 的 \u003ccode\u003einvalid frontend message type ...\u003c/code\u003e 则表示选定 socket 已经失效。\u003c/p\u003e"},{"anchor":"response","heading":"处理","html":"\u003cp\u003e收到 \u003ccode\u003eFATAL\u003c/code\u003e 或服务器 EOF 时，关闭并丢弃受影响的 socket，修正协议或代理帧后重新连接。extended-query 的 \u003ccode\u003eERROR\u003c/code\u003e 应让驱动发送协议有效的 \u003ccode\u003eSync\u003c/code\u003e 并等待 \u003ccode\u003eReadyForQuery\u003c/code\u003e，然后检查事务状态；\u003ccode\u003eSync\u003c/code\u003e 不会回滚失败的显式事务，状态为 \u003ccode\u003eE\u003c/code\u003e 时仍须执行 \u003ccode\u003eROLLBACK\u003c/code\u003e 或回到有意建立的保存点。若非幂等请求在途中，重放前先核对结果。独立探针只证明新连接可用。\u003c/p\u003e\n\u003cp\u003e将选定案例视为会话终止分支：读到服务器 EOF 后建立新连接，并且只重做已核对且具幂等性的操作。如果违规发生在会话建立前，应先修正启动或代理配置。只有客户端解析器异常或 socket 关闭而没有服务器 \u003ccode\u003eC\u003c/code\u003e 字段，不能把事件标成 \u003ccode\u003e08P01\u003c/code\u003e。\u003c/p\u003e\n\u003cp\u003e不要自行拼接字节，也不要把事务当作已经提交。若驱动无法保持报文边界或不实现 Sync 契约，应丢弃连接并核对请求结果。这一源码流程不改变选定未知字节运行：该案例的 \u003ccode\u003eFATAL\u003c/code\u003e socket 必须丢弃。\u003c/p\u003e"},{"anchor":"messages","heading":"报文","html":"\u003cp\u003e固定的协议解析路径以 \u003ccode\u003eFATAL\u003c/code\u003e 发出主报文 \u003ccode\u003einvalid frontend message type %d\u003c/code\u003e，其中字节数值是动态的。选定的 \u003ccode\u003eY\u003c/code\u003e 字节记录为 \u003ccode\u003e89\u003c/code\u003e。SQLSTATE 的依据是原始 ErrorResponse，而不是客户端异常。\u003c/p\u003e\n\u003cp\u003e其他固定源码分支以 \u003ccode\u003eERROR\u003c/code\u003e 发出以下主报文模板：\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ccode\u003ebind message has %d parameter formats but %d parameters\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003ebind message supplies %d parameters, but prepared statement \"%s\" requires %d\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003eno data left in message\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003einsufficient data left in message\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003einvalid string in message\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003einvalid message format\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp\u003e这些 Bind 和 message-buffer 变体在本页中是源码证据，不是新增运行观察，也不会全部终止 socket。\u003c/p\u003e\n\u003cp\u003e选定的线路顺序是：启动交换 → \u003ccode\u003eZ\u003c/code\u003e ReadyForQuery → 合法帧中的类型字节 \u003ccode\u003eY\u003c/code\u003e（十进制 \u003ccode\u003e89\u003c/code\u003e）→ ErrorResponse \u003ccode\u003eC=08P01\u003c/code\u003e、\u003ccode\u003eS=FATAL\u003c/code\u003e、\u003ccode\u003eM=invalid frontend message type 89\u003c/code\u003e → 服务器 EOF。collector 直接收集这些协议字段和 EOF，既不是 csvlog/jsonlog 记录，也不是后续独立探针。\u003c/p\u003e"},{"anchor":"case","heading":"代表案例","html":"\u003cp\u003eSQL 探针用于检查独立连接。真实触发是运行器拥有的 TCP 握手后发送未知前端消息字节，不能只用 SQL 表达。\u003c/p\u003e\n\u003cpre\u003e\u003ccode class=\"language-sql\"\u003eSELECT 1;\n\u003c/code\u003e\u003c/pre\u003e\n\u003cp\u003e18.6 服务器记录为 C=\u003ccode\u003e08P01\u003c/code\u003e、S=\u003ccode\u003eFATAL\u003c/code\u003e、主报文 \u003ccode\u003einvalid frontend message type 89\u003c/code\u003e；启动到达 \u003ccode\u003eZ\u003c/code\u003e，服务器 EOF 断言为 \u003ccode\u003eTrue\u003c/code\u003e，独立探针返回 \u003ccode\u003e1\u003c/code\u003e，状态 \u003ccode\u003eIDLE\u003c/code\u003e。因此没有复用触发错误的连接。\u003c/p\u003e\n\u003cp\u003e可下载的案例与证据投影分别是 \u003ca href=\"#cases\"\u003e\u003ccode\u003e08P01 案例 JSON\u003c/code\u003e\u003c/a\u003e 和 \u003ca href=\"#sources\"\u003e\u003ccode\u003e作者证据\u003c/code\u003e\u003c/a\u003e。运行器清单为 \u003ccode\u003everify/cases/08P01/cases.json\u003c/code\u003e；发布前会将页面 SQL 与共享注册表比对。\u003c/p\u003e"},{"anchor":"versions","heading":"版本","html":"\u003cp\u003e上面的生成事实表记录锁定的目录快照和最早观察到的定义。本页自然运行范围是 PostgreSQL 18.6 与 10.21，不能据此推断所有中间版本的行为。\u003c/p\u003e"},{"anchor":"related","heading":"相关","html":"\u003cul\u003e\n\u003cli\u003e\u003ca href=\"/wiki/sqlstate/08001/\"\u003e\u003ccode\u003e08001\u003c/code\u003e — sqlclient_unable_to_establish_sqlconnection\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"/wiki/sqlstate/28000/\"\u003e\u003ccode\u003e28000\u003c/code\u003e — invalid_authorization_specification\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e"},{"anchor":"sources","heading":"来源","html":"\u003cul\u003e\n\u003cli\u003e\u003ccode\u003esrc.protocol-invalid-frontend.18.6\u003c/code\u003e — \u003ccode\u003esrc/backend/tcop/postgres.c\u003c/code\u003e at \u003ccode\u003eREL_18_6\u003c/code\u003e commit \u003ccode\u003e724edf9bde9d356724ad384a2e196edc3c9f80f7\u003c/code\u003e; fixed blob SHA-256 \u003ccode\u003e9fb62275b1badf94d01ab351337b60410cd9b3ab1fe63fa9f23d6d2185a21061\u003c/code\u003e (\u003ca href=\"https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/tcop/postgres.c#L454-L456\"\u003esource\u003c/a\u003e).\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003esrc.protocol-invalid-frontend.10.23\u003c/code\u003e — \u003ccode\u003esrc/backend/tcop/postgres.c\u003c/code\u003e at \u003ccode\u003eREL_10_23\u003c/code\u003e commit \u003ccode\u003e02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4\u003c/code\u003e; fixed blob SHA-256 \u003ccode\u003ebadfe30749794afa80a799dcdbd142fd4e4732ac1c913002d365549ae5313497\u003c/code\u003e (\u003ca href=\"https://github.com/postgres/postgres/blob/02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4/src/backend/tcop/postgres.c#L430-L432\"\u003esource\u003c/a\u003e).\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003esrc.postgres-bind.10.23\u003c/code\u003e — \u003ccode\u003esrc/backend/tcop/postgres.c\u003c/code\u003e at \u003ccode\u003eREL_10_23\u003c/code\u003e commit \u003ccode\u003e02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4\u003c/code\u003e; fixed blob SHA-256 \u003ccode\u003ebadfe30749794afa80a799dcdbd142fd4e4732ac1c913002d365549ae5313497\u003c/code\u003e (\u003ca href=\"https://github.com/postgres/postgres/blob/02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4/src/backend/tcop/postgres.c#L1483-L1580\"\u003esource\u003c/a\u003e).\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003esrc.pqformat.10.23\u003c/code\u003e — \u003ccode\u003esrc/backend/libpq/pqformat.c\u003c/code\u003e at \u003ccode\u003eREL_10_23\u003c/code\u003e commit \u003ccode\u003e02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4\u003c/code\u003e; fixed blob SHA-256 \u003ccode\u003e637923dbf2b9d9a0610350784f3b1d7d36a545cd8a6bd2cbe6272d9549873a91\u003c/code\u003e (\u003ca href=\"https://github.com/postgres/postgres/blob/02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4/src/backend/libpq/pqformat.c#L432-L682\"\u003esource\u003c/a\u003e).\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003esrc.postgres-sync.10.23\u003c/code\u003e — \u003ccode\u003esrc/backend/tcop/postgres.c\u003c/code\u003e at \u003ccode\u003eREL_10_23\u003c/code\u003e commit \u003ccode\u003e02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4\u003c/code\u003e; fixed blob SHA-256 \u003ccode\u003ebadfe30749794afa80a799dcdbd142fd4e4732ac1c913002d365549ae5313497\u003c/code\u003e (\u003ca href=\"https://github.com/postgres/postgres/blob/02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4/src/backend/tcop/postgres.c#L3863-L3980\"\u003esource\u003c/a\u003e).\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003esrc.calls.REL_18_6\u003c/code\u003e / \u003ccode\u003esrc.calls.REL_10_23\u003c/code\u003e — fixed local call scans, SHA-256 \u003ccode\u003e9ee8a0e81d8f0825c5c1ae45583439859a26e602bdd4ce2f2a62aa278867ccbf\u003c/code\u003e / \u003ccode\u003e00d16d3eb01b71ccf1b245c8f3102f9d0ec9f36fb02777b8dd1b99fcb263040c\u003c/code\u003e; these scans preserve the resolved call context used by the claims.\u003c/li\u003e\n\u003c/ul\u003e"}],"summary":"前后端消息违反线路协议，通常是 FATAL。","title":"08P01 — 协议违规（protocol_violation）","translation_source_rev":"52bbab7ed2c06515ec654d1e122d29da72ce3ff3ff75f55e38e96c133a32e882"}},"RequestedLocale":"zh-Hans","Fallback":false,"Versions":["10","11","12","13","14","15","16","17","18","19","20","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":{"aliases":[],"catalogue_notes":{"earliest_observed":"7.4","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":"present","preview_scope":["19beta3"]},"class":"08","class_name":"Connection Exception","condition_name":"protocol_violation","condition_names":["protocol_violation"],"definition_changes":[],"english_manuals":{"10":{"aliases":[],"class_name":"Connection Exception","condition_name":"protocol_violation","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"9607b57e9f639b61785677ba4d226f5889fe1d19c8bf55a3337691899a9073cd","slug":"10"},"lang":"en","sqlstate":"08P01"},"11":{"aliases":[],"class_name":"Connection Exception","condition_name":"protocol_violation","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"3a024e38263ad77de228eed7930b842b42dc1d5cab9ca3727be8eed872ec9539","slug":"11"},"lang":"en","sqlstate":"08P01"},"12":{"aliases":[],"class_name":"Connection Exception","condition_name":"protocol_violation","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"1444bd6a138537cd75be88a220ee9472ac528f0cfc58758e49636d85455efe98","slug":"12"},"lang":"en","sqlstate":"08P01"},"13":{"aliases":[],"class_name":"Connection Exception","condition_name":"protocol_violation","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"4a3ef8af218e5736dfde8660ba609e84233b6b3bac7e0210ff8724cf1b27b2db","slug":"13"},"lang":"en","sqlstate":"08P01"},"14":{"aliases":[],"class_name":"Connection Exception","condition_name":"protocol_violation","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"1c12e83304e0f4ff64c9d98ca5e3007df6756932ed19867a4fa0e0650f6c5751","slug":"14"},"lang":"en","sqlstate":"08P01"},"15":{"aliases":[],"class_name":"Connection Exception","condition_name":"protocol_violation","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"2161f58f6e87f6535b3b1f3d4661427bb6765f4f6b074fcc16fac97594b50599","slug":"15"},"lang":"en","sqlstate":"08P01"},"16":{"aliases":[],"class_name":"Connection Exception","condition_name":"protocol_violation","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"928e705933d7c3d018ae3fba9d800b34e6325746d157339dce878473c519d100","slug":"16"},"lang":"en","sqlstate":"08P01"},"17":{"aliases":[],"class_name":"Connection Exception","condition_name":"protocol_violation","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"868135520af87351e3ea1ba42656111cbd2d157d98e1fef05ea158ac5729d8b1","slug":"17"},"lang":"en","sqlstate":"08P01"},"18":{"aliases":[],"class_name":"Connection Exception","condition_name":"protocol_violation","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"56dacf78e618ff0fd8c533e05db597b80d7ebbad7f8e512a888217d0640aa328","slug":"18"},"lang":"en","sqlstate":"08P01"},"19":{"aliases":[],"class_name":"Connection Exception","condition_name":"protocol_violation","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"63fb8d1aa9f494eeab9d0f8542a2b673f7746ee41ae2689d19403cb3cc425a5c","slug":"19"},"lang":"en","sqlstate":"08P01"},"20":{"aliases":[],"class_name":"Connection Exception","condition_name":"protocol_violation","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"0d3f602127cd137cf343b32d5fa78f175eeb6cdcb6353b1f6f998ede6cb7b911","slug":"devel"},"lang":"en","sqlstate":"08P01"},"8.1":{"aliases":[],"class_name":"Connection Exception","condition_name":"protocol_violation","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"0177b8818643540dec7bbef1fe92b60a3961debd52a68412301647ca146c7f2d","slug":"8.1"},"lang":"en","sqlstate":"08P01"},"8.2":{"aliases":[],"class_name":"Connection Exception","condition_name":"protocol_violation","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"d65bf7cff5958c304352c974e477183e21efe9bd68e03786001874653bf66963","slug":"8.2"},"lang":"en","sqlstate":"08P01"},"8.3":{"aliases":[],"class_name":"Connection Exception","condition_name":"protocol_violation","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"118059002973cdec5466ed3cabe7c9370b4c93d8ab542b8661d0eeb50cf6950d","slug":"8.3"},"lang":"en","sqlstate":"08P01"},"8.4":{"aliases":[],"class_name":"Connection Exception","condition_name":"protocol_violation","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"d63b10001be0581484022e33b78124a36bb3bd68d3ebe022cd7dfb375233432f","slug":"8.4"},"lang":"en","sqlstate":"08P01"},"9.0":{"aliases":[],"class_name":"Connection Exception","condition_name":"protocol_violation","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"658fc09c4c10eed7ac7dea4ed3e3eff8cc5791eb5af26b7b4a31b0f863b316db","slug":"9.0"},"lang":"en","sqlstate":"08P01"},"9.1":{"aliases":[],"class_name":"Connection Exception","condition_name":"protocol_violation","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"2d118b06c3b644c28b3ddefe9e4bef99a180321582209332372a5318f5bf8d1c","slug":"9.1"},"lang":"en","sqlstate":"08P01"},"9.2":{"aliases":[],"class_name":"Connection 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in a PostgreSQL release definition file is established; runtime throw/use scanning is maintained separately.","scope":"release-definition-catalogue","status":"definition_only"},{"evidence_ids":["postgresql:REL7_4:src/include/utils/errcodes.h","postgresql:REL7_4_10:src/include/utils/errcodes.h","postgresql:REL7_4_11:src/include/utils/errcodes.h","postgresql:REL7_4_12:src/include/utils/errcodes.h","postgresql:REL7_4_13:src/include/utils/errcodes.h","postgresql:REL7_4_14:src/include/utils/errcodes.h","postgresql:REL7_4_15:src/include/utils/errcodes.h","postgresql:REL7_4_16:src/include/utils/errcodes.h","postgresql:REL7_4_17:src/include/utils/errcodes.h","postgresql:REL7_4_18:src/include/utils/errcodes.h","postgresql:REL7_4_19:src/include/utils/errcodes.h","postgresql:REL7_4_1:src/include/utils/errcodes.h","postgresql:REL7_4_20:src/include/utils/errcodes.h","postgresql:REL7_4_21:src/include/utils/errcodes.h","postgresql:REL7_4_22:src/include/utils/errcodes.h","postgresql:REL7_4_23:src/include/utils/errcodes.h","postgresql:REL7_4_24:src/include/utils/errcodes.h","postgresql:REL7_4_25:src/include/utils/errcodes.h","postgresql:REL7_4_26:src/include/utils/errcodes.h","postgresql:REL7_4_27:src/include/utils/errcodes.h","postgresql:REL7_4_28:src/include/utils/errcodes.h","postgresql:REL7_4_29:src/include/utils/errcodes.h","postgresql:REL7_4_2:src/include/utils/errcodes.h","postgresql:REL7_4_30:src/include/utils/errcodes.h","postgresql:REL7_4_3:src/include/utils/errcodes.h","postgresql:REL7_4_4:src/include/utils/errcodes.h","postgresql:REL7_4_5:src/include/utils/errcodes.h","postgresql:REL7_4_6:src/include/utils/errcodes.h","postgresql:REL7_4_7:src/include/utils/errcodes.h","postgresql:REL7_4_8:src/include/utils/errcodes.h","postgresql:REL7_4_9:src/include/utils/errcodes.h","postgresql:REL8_0_0:src/include/utils/errcodes.h","postgresql:REL8_0_10:src/include/utils/errcodes.h","postgresql:REL8_0_11:src/include/utils/errcodes.h","postgresql:REL8_0_12:src/include/utils/errcodes.h","postgresql:REL8_0_13:src/include/utils/errcodes.h","postgresql:REL8_0_14:src/include/utils/errcodes.h","postgresql:REL8_0_15:src/include/utils/errcodes.h","postgresql:REL8_0_16:src/include/utils/errcodes.h","postgresql:REL8_0_17:src/include/utils/errcodes.h","postgresql:REL8_0_18:src/include/utils/errcodes.h","postgresql:REL8_0_19:src/include/utils/errcodes.h","postgresql:REL8_0_1:src/include/utils/errcodes.h","postgresql:REL8_0_20:src/include/utils/errcodes.h","postgresql:REL8_0_21:src/include/utils/errcodes.h","postgresql:REL8_0_22:src/include/utils/errcodes.h","postgresql:REL8_0_23:src/include/utils/errcodes.h","postgresql:REL8_0_24:src/include/utils/errcodes.h","postgresql:REL8_0_25:src/include/utils/errcodes.h","postgresql:REL8_0_26:src/include/utils/errcodes.h","postgresql:REL8_0_2:src/include/utils/errcodes.h","postgresql:REL8_0_3:src/include/utils/errcodes.h","postgresql:REL8_0_4:src/include/utils/errcodes.h","postgresql:REL8_0_5:src/include/utils/errcodes.h","postgresql:REL8_0_6:src/include/utils/errcodes.h","postgresql:REL8_0_7:src/include/utils/errcodes.h","postgresql:REL8_0_8:src/include/utils/errcodes.h","postgresql:REL8_0_9:src/include/utils/errcodes.h","postgresql:REL8_1_0:src/include/utils/errcodes.h","postgresql:REL8_1_10:src/include/utils/errcodes.h","postgresql:REL8_1_11:src/include/utils/errcodes.h","postgresql:REL8_1_12:src/include/utils/errcodes.h","postgresql:REL8_1_13:src/include/utils/errcodes.h","postgresql:REL8_1_14:src/include/utils/errcodes.h","postgresql:REL8_1_15:src/include/utils/errcodes.h","postgresql:REL8_1_16:src/include/utils/errcodes.h","postgresql:REL8_1_17:src/include/utils/errcodes.h","postgresql:REL8_1_18:src/include/utils/errcodes.h","postgresql:REL8_1_19:src/include/utils/errcodes.h","postgresql:REL8_1_1:src/include/utils/errcodes.h","postgresql:REL8_1_20:src/include/utils/errcodes.h","postgresql:REL8_1_21:src/include/utils/errcodes.h","postgresql:REL8_1_22:src/include/utils/errcodes.h","postgresql:REL8_1_23:src/include/utils/errcodes.h","postgresql:REL8_1_2:src/include/utils/errcodes.h","postgresql:REL8_1_3:src/include/utils/errcodes.h","postgresql:REL8_1_4:src/include/utils/errcodes.h","postgresql:REL8_1_5:src/include/utils/errcodes.h","postgresql:REL8_1_6:src/include/utils/errcodes.h","postgresql:REL8_1_7:src/include/utils/errcodes.h","postgresql:REL8_1_8:src/include/utils/errcodes.h","postgresql:REL8_1_9:src/include/utils/errcodes.h","postgresql:REL8_2_0:src/include/utils/errcodes.h","postgresql:REL8_2_10:src/include/utils/errcodes.h","postgresql:REL8_2_11:src/include/utils/errcodes.h","postgresql:REL8_2_12:src/include/utils/errcodes.h","postgresql:REL8_2_13:src/include/utils/errcodes.h","postgresql:REL8_2_14:src/include/utils/errcodes.h","postgresql:REL8_2_15:src/include/utils/errcodes.h","postgresql:REL8_2_16:src/include/utils/errcodes.h","postgresql:REL8_2_17:src/include/utils/errcodes.h","postgresql:REL8_2_18:src/include/utils/errcodes.h","postgresql:REL8_2_19:src/include/utils/errcodes.h","postgresql:REL8_2_1:src/include/utils/errcodes.h","postgresql:REL8_2_20:src/include/utils/errcodes.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old definition path and same-tag documentation were locked for the observed 7.4..8.4 tags; this is a definition presence bound, not a runtime path or precise introducing commit.","scope":"pre9-definition-history","status":"definition_only"}]},"Evidence":[{"Kind":"cases","Ordinal":0,"ID":"protocol_violation","ServerVersion":null,"Status":null,"Payload":{"assertions":["The selected server diagnostic has the expected SQLSTATE","The selected recovery/probe assertions pass","Runner-owned resources are cleaned up"],"case_id":"protocol_violation","cleanup":"Drop the case schema with an owner connection.","has_snippet":true,"position":0,"preconditions":["A runner-owned disposable target is provisioned."],"repair":"Follow the case-specific repair statements and verify the resulting state.","trigger":"Complete a startup handshake, then send a correctly framed unknown frontend message type.","versions":["10","18"]}},{"Kind":"claims","Ordinal":0,"ID":"identity.class-and-condition","ServerVersion":null,"Status":null,"Payload":{"claim_id":"identity.class-and-condition","limits":"Directory identity does not identify every backend or client path.","method":"Read the fixed errcodes.txt definition and the locked catalogue metadata.","position":0,"runtime":[],"sources":["src.errcodes.18.6"],"statement":"08P01 is the protocol_violation condition in Class 08."}},{"Kind":"claims","Ordinal":1,"ID":"mechanism.backend-path","ServerVersion":null,"Status":null,"Payload":{"claim_id":"mechanism.backend-path","limits":"Other calls can retain the same SQLSTATE with different context or text.","method":"Trace the resolved source call records at the fixed release commits and compare their dynamic message fields.","position":1,"runtime":[],"sources":["src.protocol-invalid-frontend.18.6","src.protocol-invalid-frontend.10.23"],"statement":"The fixed source paths associated with 08P01 report the condition in the mechanism selected for this page."}},{"Kind":"claims","Ordinal":2,"ID":"extended-query-error-recovery","ServerVersion":null,"Status":null,"Payload":{"claim_id":"extended-query-error-recovery","limits":"This is a REL_10_23 source contract; no Bind or Sync runtime was selected in this batch, and a driver must send a valid Sync rather than arbitrary bytes.","method":"Read the complete REL_10_23 exec_bind_message branch and the surrounding top-level error-recovery and Sync handling in postgres.c.","position":2,"runtime":[],"sources":["src.postgres-bind.10.23","src.postgres-sync.10.23"],"statement":"The fixed extended-query Bind path reports ERROR 08P01 for parameter-format cardinality mismatches or a parameter count that differs from the prepared statement. After an ERROR while processing an extended-query message, the top-level loop skips messages until a protocol-valid Sync and then resumes the normal ReadyForQuery flow; this ERROR path is distinct from the unknown frontend type FATAL branch."}},{"Kind":"claims","Ordinal":3,"ID":"message-buffer-boundary","ServerVersion":null,"Status":null,"Payload":{"claim_id":"message-buffer-boundary","limits":"The exact branch depends on the parser and message framing; this source scan does not select a natural runtime or generalize every malformed frame.","method":"Read pq_getmsgbyte, pq_getmsgbytes/pq_copymsgbytes, pq_getmsgstring/pq_getmsgrawstring, and pq_getmsgend in the fixed pqformat.c source.","position":3,"runtime":[],"sources":["src.pqformat.10.23"],"statement":"The fixed REL_10_23 pqformat readers report ERROR 08P01 for a depleted message, insufficient bytes, an invalid string, or trailing message data. These parser errors are source-only examples of protocol_violation and do not imply the unknown-message FATAL socket termination."}},{"Kind":"claims","Ordinal":4,"ID":"runtime.representative-case","ServerVersion":null,"Status":null,"Payload":{"claim_id":"runtime.representative-case","limits":"This covers the selected case and versions only; it does not generalize to every driver, proxy, or intermediate release.","method":"Run the shared registry case on isolated runner-owned latest and PG10 targets; inspect the final summaries and raw results.","position":4,"runtime":["runtime.08P01-eof-repair-latest.latest","runtime.08P01-eof-repair-pg10.pg10"],"sources":["snippet-registry.08P01","manifest.08P01"],"statement":"The selected protocol_violation case passed with the expected structured diagnostics, recovery assertions, and cleanup on PostgreSQL 18.6 and 10.21."}},{"Kind":"claims","Ordinal":5,"ID":"protocol-phase-boundary","ServerVersion":null,"Status":null,"Payload":{"claim_id":"protocol-phase-boundary","limits":"The selected runtime covers one unknown frontend byte and does not generalize to every framing, proxy, or startup failure.","method":"Compare the fixed postgres.c dispatch path, the protocol error-field contract, and the selected raw collector sequence.","position":5,"runtime":[],"sources":["src.protocol-invalid-frontend.18.6","doc.protocol.18","runtime.representative-case"],"statement":"The selected unknown-message branch occurs after startup reaches ReadyForQuery, emits a FATAL ErrorResponse, and closes the affected socket; a pre-session protocol failure has no session transaction, and a client EOF without the server ErrorResponse is not sufficient to assign 08P01."}},{"Kind":"claims","Ordinal":6,"ID":"versions.catalogue-boundary","ServerVersion":null,"Status":null,"Payload":{"claim_id":"versions.catalogue-boundary","limits":"Presence in a definition file is not an exact behavioral introduction; the two runtime targets do not prove all middle versions.","method":"Read the generated facts block and locked manifest, then compare the selected target summaries.","position":6,"runtime":[],"sources":["src.errcodes.18.6","src.calls.REL_18_6","src.calls.REL_10_23"],"statement":"The locked catalogue records 08P01 in the listed snapshots; the runtime comparison here is limited to PostgreSQL 18.6 and 10.21."}},{"Kind":"messages","Ordinal":0,"ID":"message.protocol-invalid-frontend","ServerVersion":null,"Status":null,"Payload":{"limits":"","message_id":"message.protocol-invalid-frontend","path":"","position":0,"raw":{"id":"message.protocol-invalid-frontend","primary_template":"invalid frontend message type %d","severity_source":"explicit FATAL","sources":["src.protocol-invalid-frontend.18.6","src.protocol-invalid-frontend.10.23"],"sqlstate":"08P01"},"severity":"explicit FATAL","sources":["src.protocol-invalid-frontend.18.6","src.protocol-invalid-frontend.10.23"],"templates":[{"kind":"primary","literal":"invalid frontend message type","position":0,"role":"","template":"invalid frontend message type %d"}]}},{"Kind":"messages","Ordinal":1,"ID":"message.bind-format-count","ServerVersion":null,"Status":null,"Payload":{"limits":"","message_id":"message.bind-format-count","path":"","position":1,"raw":{"id":"message.bind-format-count","primary_template":"bind message has %d parameter formats but %d parameters","severity_source":"explicit ERROR","sources":["src.postgres-bind.10.23"],"sqlstate":"08P01"},"severity":"explicit ERROR","sources":["src.postgres-bind.10.23"],"templates":[{"kind":"primary","literal":"bind message has parameter formats but parameters","position":0,"role":"","template":"bind message has %d parameter formats but %d parameters"}]}},{"Kind":"messages","Ordinal":2,"ID":"message.bind-parameter-count","ServerVersion":null,"Status":null,"Payload":{"limits":"","message_id":"message.bind-parameter-count","path":"","position":2,"raw":{"id":"message.bind-parameter-count","primary_template":"bind message supplies %d parameters, but prepared statement \"%s\" requires %d","severity_source":"explicit ERROR","sources":["src.postgres-bind.10.23"],"sqlstate":"08P01"},"severity":"explicit ERROR","sources":["src.postgres-bind.10.23"],"templates":[{"kind":"primary","literal":"bind message supplies parameters, but prepared statement \" \" requires","position":0,"role":"","template":"bind message supplies %d parameters, but prepared statement \"%s\" requires %d"}]}},{"Kind":"messages","Ordinal":3,"ID":"message.no-data-left","ServerVersion":null,"Status":null,"Payload":{"limits":"","message_id":"message.no-data-left","path":"","position":3,"raw":{"id":"message.no-data-left","primary_template":"no data left in message","severity_source":"explicit ERROR","sources":["src.pqformat.10.23"],"sqlstate":"08P01"},"severity":"explicit ERROR","sources":["src.pqformat.10.23"],"templates":[{"kind":"primary","literal":"no data left in message","position":0,"role":"","template":"no data left in message"}]}},{"Kind":"messages","Ordinal":4,"ID":"message.insufficient-data-left","ServerVersion":null,"Status":null,"Payload":{"limits":"","message_id":"message.insufficient-data-left","path":"","position":4,"raw":{"id":"message.insufficient-data-left","primary_template":"insufficient data left in message","severity_source":"explicit ERROR","sources":["src.pqformat.10.23"],"sqlstate":"08P01"},"severity":"explicit ERROR","sources":["src.pqformat.10.23"],"templates":[{"kind":"primary","literal":"insufficient data left in message","position":0,"role":"","template":"insufficient data left in 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