{"Entry":{"collection":"sqlstate","key":"42P04","name":"42P04","aliases":[],"metadata":{"aliases":[],"case_count":0,"class_code":"42","condition_name":"duplicate_database","condition_names":["duplicate_database"],"content_hash":"251251f8430c078f4d3cac21d7a97682601052ecac1c7bc34a0a9af737dd747e","depth":"full","editorial_review":"reviewed","evidence_tier":"source_path_confirmed","imported_at":"2026-09-30T17:45:27.659281+08:00","introduced":null,"known_present_by":"7.4","macros":["ERRCODE_DUPLICATE_DATABASE"],"name_zh":"重复数据库","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_DUPLICATE_DATABASE","removed":null,"runtime_verification":"not_run","severity_classes":["E"],"snippet_count":0,"source_rev":"english-manuals:f1db4505ca7b2febec41002e678784e5ca3205000b2f242e3a94549651fe8102","sqlstate":"42P04","status":"active","summary_zh":"集群中已存在同名数据库。"}},"Definition":{"Collection":"sqlstate","Key":"42P04","SourceDatabase":"center","Version":"18","SourceTable":"sqlstate","SourceKey":"42P04","SourceRevision":"english-manuals:f1db4505ca7b2febec41002e678784e5ca3205000b2f242e3a94549651fe8102","Facts":{"aliases":[],"class_name":"Syntax Error or Access Rule Violation","condition_name":"duplicate_database","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"56dacf78e618ff0fd8c533e05db597b80d7ebbad7f8e512a888217d0640aa328","slug":"18"},"lang":"en","sqlstate":"42P04"},"ManualEvidence":{"doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"56dacf78e618ff0fd8c533e05db597b80d7ebbad7f8e512a888217d0640aa328","slug":"18"}},"MeasuredEvidence":{}},"Text":{"Collection":"sqlstate","Key":"42P04","SourceDatabase":"center","Version":"","Locale":"zh-Hans","Title":"42P04 — 重复数据库","Summary":"集群中已存在同名数据库。","BodyHTML":"\u003ch1\u003e42P04 — 重复数据库\u003c/h1\u003e\n\u003ch2\u003e速览 {#at-a-glance}\u003c/h2\u003e\n\u003cp\u003e\u003ccode\u003e42P04\u003c/code\u003e（\u003cstrong\u003eduplicate_database\u003c/strong\u003e）表示数据库管理路径发现集群中已有同名数据库。这是集群级名称检查，不是当前库内的关系冲突；CREATE 和 RENAME 的外围检查也不同。\u003c/p\u003e\n\u003ch2\u003e含义 {#meaning}\u003c/h2\u003e\n\u003cp\u003e\u003ccode\u003ecreatedb\u003c/code\u003e 会用 \u003ccode\u003eget_database_oid(dbname, true)\u003c/code\u003e 检查目标名称，冲突时报告 ERROR \u003ccode\u003edatabase \u0026#34;%s\u0026#34; already exists\u003c/code\u003e。\u003ccode\u003eRenameDatabase\u003c/code\u003e 在查找旧数据库、检查所有权和 \u003ccode\u003eCREATEDB\u003c/code\u003e 权限之后，对 \u003ccode\u003enewname\u003c/code\u003e 做同样检查。因此 \u003ccode\u003e%s\u003c/code\u003e 在 CREATE 中是请求的数据库名，在 RENAME 中是新名称。\u003c/p\u003e\n\u003cp\u003eutility 分发器在进入 \u003ccode\u003ecreatedb\u003c/code\u003e 前调用 \u003ccode\u003ePreventInTransactionBlock(isTopLevel, \u0026#34;CREATE DATABASE\u0026#34;)\u003c/code\u003e。所以在显式事务中执行 CREATE DATABASE 是另一种事务块错误，不能据此声称发出了 \u003ccode\u003e42P04\u003c/code\u003e；RENAME 则有独立的旧名、所有权、权限和新名检查。\u003c/p\u003e\n\u003ch2\u003e诊断 {#diagnosis}\u003c/h2\u003e\n\u003cp\u003e确认目标集群和准确名称，检查 \u003ccode\u003epg_database\u003c/code\u003e、标识符折叠和迁移竞争。CREATE 另查目标名称、模板和所有者前提；RENAME 同时查旧名、新名、所有权和 \u003ccode\u003eCREATEDB\u003c/code\u003e。旧数据库不存在或权限不足不应误判为 \u003ccode\u003e42P04\u003c/code\u003e。\u003c/p\u003e\n\u003ch2\u003e处理 {#response}\u003c/h2\u003e\n\u003cp\u003e已有库就是目标时让编排幂等并检查它；否则选择未占用名称。CREATE DATABASE 要在顶层、显式事务块之外执行。RENAME 只有在确认旧库、所有权、\u003ccode\u003eCREATEDB\u003c/code\u003e、活动会话、依赖和集群身份后才选择可用新名。如果 RENAME 在显式事务中报错，下一条命令前应执行 \u003ccode\u003eROLLBACK\u003c/code\u003e；若必须保留外层事务，则回滚到改名前建立的保存点。删除或改名不是所有 \u003ccode\u003e42P04\u003c/code\u003e 的通用修复。\u003c/p\u003e\n\u003ch2\u003e消息变体 {#messages}\u003c/h2\u003e\n\u003cp\u003e选定路径均为 \u003ccode\u003eERROR\u003c/code\u003e \u003ccode\u003edatabase \u0026#34;%s\u0026#34; already exists\u003c/code\u003e：\u003ccode\u003ecreatedb\u003c/code\u003e 使用请求名称，\u003ccode\u003eRenameDatabase\u003c/code\u003e 使用新名称。utility 中的 \u003ccode\u003ePreventInTransactionBlock\u003c/code\u003e 证明 CREATE DATABASE 有独立事务限制，不是另一条 \u003ccode\u003e42P04\u003c/code\u003e 报文。\u003c/p\u003e\n\u003ch2\u003e版本 {#versions}\u003c/h2\u003e\n\u003cp\u003e目录范围从 7.4 到 18.6、19beta3，不是精确的功能引入判断。选定的是 18.6 固定 CREATE、RENAME 和分发器事务检查路径，未运行数据库。\u003c/p\u003e\n\u003ch2\u003e相关 {#related}\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"/wiki/sqlstate/42P07/\" rel=\"nofollow\"\u003e\u003ccode\u003e42P07\u003c/code\u003e\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"/wiki/sqlstate/42P06/\" rel=\"nofollow\"\u003e\u003ccode\u003e42P06\u003c/code\u003e\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"/wiki/sqlstate/42710/\" rel=\"nofollow\"\u003e\u003ccode\u003e42710\u003c/code\u003e\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\n\u003cp\u003e\u003ccode\u003esrc.errcodes.42P04.18.6\u003c/code\u003e — \u003ccode\u003esrc/backend/utils/errcodes.txt\u003c/code\u003e line 379，固定于 \u003ccode\u003e724edf9bde9d356724ad384a2e196edc3c9f80f7\u003c/code\u003e；SHA-256 \u003ccode\u003e6e8de346643ba84aa3c9c6a73360acfc7b2dfb89162c06c08ce9bf5bcd5bbcba\u003c/code\u003e（\u003ca href=\"https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/utils/errcodes.txt#L379\" rel=\"nofollow\"\u003e源码\u003c/a\u003e）。\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ccode\u003esrc.call.42P04.465a77b5605c341bc91f6990\u003c/code\u003e — \u003ccode\u003esrc/backend/commands/dbcommands.c\u003c/code\u003e lines 1393-1395，固定于 \u003ccode\u003e724edf9bde9d356724ad384a2e196edc3c9f80f7\u003c/code\u003e；SHA-256 \u003ccode\u003e64b77d2197dce16eb1ad19d8168382459d621a03df0b00be157f7db39ca22acf\u003c/code\u003e（\u003ca href=\"https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/commands/dbcommands.c#L1393-L1395\" rel=\"nofollow\"\u003e源码\u003c/a\u003e）。\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ccode\u003esrc.call.42P04.b0d1644def83c14a7504fec4\u003c/code\u003e — \u003ccode\u003esrc/backend/commands/dbcommands.c\u003c/code\u003e lines 1949-1951，固定于 \u003ccode\u003e724edf9bde9d356724ad384a2e196edc3c9f80f7\u003c/code\u003e；SHA-256 \u003ccode\u003e64b77d2197dce16eb1ad19d8168382459d621a03df0b00be157f7db39ca22acf\u003c/code\u003e（\u003ca href=\"https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/commands/dbcommands.c#L1949-L1951\" rel=\"nofollow\"\u003e源码\u003c/a\u003e）。\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ccode\u003esrc.call.42P04.create-tx-guard\u003c/code\u003e — \u003ccode\u003esrc/backend/tcop/utility.c\u003c/code\u003e lines 769-773，固定于 \u003ccode\u003e724edf9bde9d356724ad384a2e196edc3c9f80f7\u003c/code\u003e；SHA-256 \u003ccode\u003e7aae5d07628b6debf8456d1d4ea96f28912232192e56ea25773b4c4b61235a00\u003c/code\u003e（\u003ca href=\"https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/tcop/utility.c#L769-L773\" rel=\"nofollow\"\u003e源码\u003c/a\u003e）。\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ccode\u003esrc.calls.REL_18_6.42P04\u003c/code\u003e — 固定本地核心调用扫描；SHA-256 \u003ccode\u003e9ee8a0e81d8f0825c5c1ae45583439859a26e602bdd4ce2f2a62aa278867ccbf\u003c/code\u003e。\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ca href=\"#sources\" rel=\"nofollow\"\u003e\u003ccode\u003e作者证据\u003c/code\u003e\u003c/a\u003e — 记录源码断言、消息角色和运行边界。\u003c/p\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n","SourceRevision":"english-manuals:f1db4505ca7b2febec41002e678784e5ca3205000b2f242e3a94549651fe8102","ContentHash":"5e9e307060773ec673c211e022acca55d10ea37158d9142f5123a0021eec4932","Payload":{"body_md":"# 42P04 — 重复数据库\n\n## 速览 {#at-a-glance}\n\n`42P04`（**duplicate_database**）表示数据库管理路径发现集群中已有同名数据库。这是集群级名称检查，不是当前库内的关系冲突；CREATE 和 RENAME 的外围检查也不同。\n\n\n## 含义 {#meaning}\n\n`createdb` 会用 `get_database_oid(dbname, true)` 检查目标名称，冲突时报告 ERROR `database \"%s\" already exists`。`RenameDatabase` 在查找旧数据库、检查所有权和 `CREATEDB` 权限之后，对 `newname` 做同样检查。因此 `%s` 在 CREATE 中是请求的数据库名，在 RENAME 中是新名称。\n\nutility 分发器在进入 `createdb` 前调用 `PreventInTransactionBlock(isTopLevel, \"CREATE DATABASE\")`。所以在显式事务中执行 CREATE DATABASE 是另一种事务块错误，不能据此声称发出了 `42P04`；RENAME 则有独立的旧名、所有权、权限和新名检查。\n\n## 诊断 {#diagnosis}\n\n确认目标集群和准确名称，检查 `pg_database`、标识符折叠和迁移竞争。CREATE 另查目标名称、模板和所有者前提；RENAME 同时查旧名、新名、所有权和 `CREATEDB`。旧数据库不存在或权限不足不应误判为 `42P04`。\n\n## 处理 {#response}\n\n已有库就是目标时让编排幂等并检查它；否则选择未占用名称。CREATE DATABASE 要在顶层、显式事务块之外执行。RENAME 只有在确认旧库、所有权、`CREATEDB`、活动会话、依赖和集群身份后才选择可用新名。如果 RENAME 在显式事务中报错，下一条命令前应执行 `ROLLBACK`；若必须保留外层事务，则回滚到改名前建立的保存点。删除或改名不是所有 `42P04` 的通用修复。\n\n## 消息变体 {#messages}\n\n选定路径均为 `ERROR` `database \"%s\" already exists`：`createdb` 使用请求名称，`RenameDatabase` 使用新名称。utility 中的 `PreventInTransactionBlock` 证明 CREATE DATABASE 有独立事务限制，不是另一条 `42P04` 报文。\n\n## 版本 {#versions}\n\n目录范围从 7.4 到 18.6、19beta3，不是精确的功能引入判断。选定的是 18.6 固定 CREATE、RENAME 和分发器事务检查路径，未运行数据库。\n\n## 相关 {#related}\n\n- [`42P07`](/wiki/sqlstate/42P07/)\n- [`42P06`](/wiki/sqlstate/42P06/)\n- [`42710`](/wiki/sqlstate/42710/)\n\n## 来源 {#sources}\n- `src.errcodes.42P04.18.6` — `src/backend/utils/errcodes.txt` line 379，固定于 `724edf9bde9d356724ad384a2e196edc3c9f80f7`；SHA-256 `6e8de346643ba84aa3c9c6a73360acfc7b2dfb89162c06c08ce9bf5bcd5bbcba`（[源码](https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/utils/errcodes.txt#L379)）。\n\n- `src.call.42P04.465a77b5605c341bc91f6990` — `src/backend/commands/dbcommands.c` lines 1393-1395，固定于 `724edf9bde9d356724ad384a2e196edc3c9f80f7`；SHA-256 `64b77d2197dce16eb1ad19d8168382459d621a03df0b00be157f7db39ca22acf`（[源码](https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/commands/dbcommands.c#L1393-L1395)）。\n- `src.call.42P04.b0d1644def83c14a7504fec4` — `src/backend/commands/dbcommands.c` lines 1949-1951，固定于 `724edf9bde9d356724ad384a2e196edc3c9f80f7`；SHA-256 `64b77d2197dce16eb1ad19d8168382459d621a03df0b00be157f7db39ca22acf`（[源码](https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/commands/dbcommands.c#L1949-L1951)）。\n- `src.call.42P04.create-tx-guard` — `src/backend/tcop/utility.c` lines 769-773，固定于 `724edf9bde9d356724ad384a2e196edc3c9f80f7`；SHA-256 `7aae5d07628b6debf8456d1d4ea96f28912232192e56ea25773b4c4b61235a00`（[源码](https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/tcop/utility.c#L769-L773)）。\n- `src.calls.REL_18_6.42P04` — 固定本地核心调用扫描；SHA-256 `9ee8a0e81d8f0825c5c1ae45583439859a26e602bdd4ce2f2a62aa278867ccbf`。\n- [`作者证据`](#sources) — 记录源码断言、消息角色和运行边界。\n","description":"PostgreSQL SQLSTATE 42P04（duplicate_database）的来源与诊断参考。","is_stale":false,"name":"重复数据库","sections":[{"anchor":"","heading":"","html":"\u0026lt;h1\u0026gt;42P04 — 重复数据库\u0026lt;/h1\u0026gt;"},{"anchor":"at-a-glance","heading":"速览","html":"\u003cp\u003e\u003ccode\u003e42P04\u003c/code\u003e（\u003cstrong\u003eduplicate_database\u003c/strong\u003e）表示数据库管理路径发现集群中已有同名数据库。这是集群级名称检查，不是当前库内的关系冲突；CREATE 和 RENAME 的外围检查也不同。\u003c/p\u003e"},{"anchor":"meaning","heading":"含义","html":"\u003cp\u003e\u003ccode\u003ecreatedb\u003c/code\u003e 会用 \u003ccode\u003eget_database_oid(dbname, true)\u003c/code\u003e 检查目标名称，冲突时报告 ERROR \u003ccode\u003edatabase \"%s\" already exists\u003c/code\u003e。\u003ccode\u003eRenameDatabase\u003c/code\u003e 在查找旧数据库、检查所有权和 \u003ccode\u003eCREATEDB\u003c/code\u003e 权限之后，对 \u003ccode\u003enewname\u003c/code\u003e 做同样检查。因此 \u003ccode\u003e%s\u003c/code\u003e 在 CREATE 中是请求的数据库名，在 RENAME 中是新名称。\u003c/p\u003e\n\u003cp\u003eutility 分发器在进入 \u003ccode\u003ecreatedb\u003c/code\u003e 前调用 \u003ccode\u003ePreventInTransactionBlock(isTopLevel, \"CREATE DATABASE\")\u003c/code\u003e。所以在显式事务中执行 CREATE DATABASE 是另一种事务块错误，不能据此声称发出了 \u003ccode\u003e42P04\u003c/code\u003e；RENAME 则有独立的旧名、所有权、权限和新名检查。\u003c/p\u003e"},{"anchor":"diagnosis","heading":"诊断","html":"\u003cp\u003e确认目标集群和准确名称，检查 \u003ccode\u003epg_database\u003c/code\u003e、标识符折叠和迁移竞争。CREATE 另查目标名称、模板和所有者前提；RENAME 同时查旧名、新名、所有权和 \u003ccode\u003eCREATEDB\u003c/code\u003e。旧数据库不存在或权限不足不应误判为 \u003ccode\u003e42P04\u003c/code\u003e。\u003c/p\u003e"},{"anchor":"response","heading":"处理","html":"\u003cp\u003e已有库就是目标时让编排幂等并检查它；否则选择未占用名称。CREATE DATABASE 要在顶层、显式事务块之外执行。RENAME 只有在确认旧库、所有权、\u003ccode\u003eCREATEDB\u003c/code\u003e、活动会话、依赖和集群身份后才选择可用新名。如果 RENAME 在显式事务中报错，下一条命令前应执行 \u003ccode\u003eROLLBACK\u003c/code\u003e；若必须保留外层事务，则回滚到改名前建立的保存点。删除或改名不是所有 \u003ccode\u003e42P04\u003c/code\u003e 的通用修复。\u003c/p\u003e"},{"anchor":"messages","heading":"消息变体","html":"\u003cp\u003e选定路径均为 \u003ccode\u003eERROR\u003c/code\u003e \u003ccode\u003edatabase \"%s\" already exists\u003c/code\u003e：\u003ccode\u003ecreatedb\u003c/code\u003e 使用请求名称，\u003ccode\u003eRenameDatabase\u003c/code\u003e 使用新名称。utility 中的 \u003ccode\u003ePreventInTransactionBlock\u003c/code\u003e 证明 CREATE DATABASE 有独立事务限制，不是另一条 \u003ccode\u003e42P04\u003c/code\u003e 报文。\u003c/p\u003e"},{"anchor":"versions","heading":"版本","html":"\u003cp\u003e目录范围从 7.4 到 18.6、19beta3，不是精确的功能引入判断。选定的是 18.6 固定 CREATE、RENAME 和分发器事务检查路径，未运行数据库。\u003c/p\u003e"},{"anchor":"related","heading":"相关","html":"\u003cul\u003e\n\u003cli\u003e\u003ca href=\"/wiki/sqlstate/42P07/\"\u003e\u003ccode\u003e42P07\u003c/code\u003e\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"/wiki/sqlstate/42P06/\"\u003e\u003ccode\u003e42P06\u003c/code\u003e\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"/wiki/sqlstate/42710/\"\u003e\u003ccode\u003e42710\u003c/code\u003e\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e"},{"anchor":"sources","heading":"来源","html":"\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ccode\u003esrc.errcodes.42P04.18.6\u003c/code\u003e — \u003ccode\u003esrc/backend/utils/errcodes.txt\u003c/code\u003e line 379，固定于 \u003ccode\u003e724edf9bde9d356724ad384a2e196edc3c9f80f7\u003c/code\u003e；SHA-256 \u003ccode\u003e6e8de346643ba84aa3c9c6a73360acfc7b2dfb89162c06c08ce9bf5bcd5bbcba\u003c/code\u003e（\u003ca href=\"https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/utils/errcodes.txt#L379\"\u003e源码\u003c/a\u003e）。\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ccode\u003esrc.call.42P04.465a77b5605c341bc91f6990\u003c/code\u003e — \u003ccode\u003esrc/backend/commands/dbcommands.c\u003c/code\u003e lines 1393-1395，固定于 \u003ccode\u003e724edf9bde9d356724ad384a2e196edc3c9f80f7\u003c/code\u003e；SHA-256 \u003ccode\u003e64b77d2197dce16eb1ad19d8168382459d621a03df0b00be157f7db39ca22acf\u003c/code\u003e（\u003ca href=\"https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/commands/dbcommands.c#L1393-L1395\"\u003e源码\u003c/a\u003e）。\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003esrc.call.42P04.b0d1644def83c14a7504fec4\u003c/code\u003e — \u003ccode\u003esrc/backend/commands/dbcommands.c\u003c/code\u003e lines 1949-1951，固定于 \u003ccode\u003e724edf9bde9d356724ad384a2e196edc3c9f80f7\u003c/code\u003e；SHA-256 \u003ccode\u003e64b77d2197dce16eb1ad19d8168382459d621a03df0b00be157f7db39ca22acf\u003c/code\u003e（\u003ca href=\"https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/commands/dbcommands.c#L1949-L1951\"\u003e源码\u003c/a\u003e）。\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003esrc.call.42P04.create-tx-guard\u003c/code\u003e — \u003ccode\u003esrc/backend/tcop/utility.c\u003c/code\u003e lines 769-773，固定于 \u003ccode\u003e724edf9bde9d356724ad384a2e196edc3c9f80f7\u003c/code\u003e；SHA-256 \u003ccode\u003e7aae5d07628b6debf8456d1d4ea96f28912232192e56ea25773b4c4b61235a00\u003c/code\u003e（\u003ca href=\"https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/tcop/utility.c#L769-L773\"\u003e源码\u003c/a\u003e）。\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003esrc.calls.REL_18_6.42P04\u003c/code\u003e — 固定本地核心调用扫描；SHA-256 \u003ccode\u003e9ee8a0e81d8f0825c5c1ae45583439859a26e602bdd4ce2f2a62aa278867ccbf\u003c/code\u003e。\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#sources\"\u003e\u003ccode\u003e作者证据\u003c/code\u003e\u003c/a\u003e — 记录源码断言、消息角色和运行边界。\u003c/li\u003e\n\u003c/ul\u003e"}],"summary":"集群中已存在同名数据库。","title":"42P04 — 重复数据库","translation_source_rev":"efd48a26b5d5f77f6891d8eb290e165e6caf41eac7d64786c0b88fa6676b39b3"}},"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":"42","class_name":"Syntax Error or Access Rule Violation","condition_name":"duplicate_database","condition_names":["duplicate_database"],"definition_changes":[],"english_manuals":{"10":{"aliases":[],"class_name":"Syntax Error or Access Rule Violation","condition_name":"duplicate_database","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"9607b57e9f639b61785677ba4d226f5889fe1d19c8bf55a3337691899a9073cd","slug":"10"},"lang":"en","sqlstate":"42P04"},"11":{"aliases":[],"class_name":"Syntax Error or Access Rule Violation","condition_name":"duplicate_database","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"3a024e38263ad77de228eed7930b842b42dc1d5cab9ca3727be8eed872ec9539","slug":"11"},"lang":"en","sqlstate":"42P04"},"12":{"aliases":[],"class_name":"Syntax Error or Access Rule Violation","condition_name":"duplicate_database","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"1444bd6a138537cd75be88a220ee9472ac528f0cfc58758e49636d85455efe98","slug":"12"},"lang":"en","sqlstate":"42P04"},"13":{"aliases":[],"class_name":"Syntax Error or Access Rule Violation","condition_name":"duplicate_database","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"4a3ef8af218e5736dfde8660ba609e84233b6b3bac7e0210ff8724cf1b27b2db","slug":"13"},"lang":"en","sqlstate":"42P04"},"14":{"aliases":[],"class_name":"Syntax Error or Access Rule Violation","condition_name":"duplicate_database","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"1c12e83304e0f4ff64c9d98ca5e3007df6756932ed19867a4fa0e0650f6c5751","slug":"14"},"lang":"en","sqlstate":"42P04"},"15":{"aliases":[],"class_name":"Syntax Error or Access Rule Violation","condition_name":"duplicate_database","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"2161f58f6e87f6535b3b1f3d4661427bb6765f4f6b074fcc16fac97594b50599","slug":"15"},"lang":"en","sqlstate":"42P04"},"16":{"aliases":[],"class_name":"Syntax Error or Access Rule Violation","condition_name":"duplicate_database","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"928e705933d7c3d018ae3fba9d800b34e6325746d157339dce878473c519d100","slug":"16"},"lang":"en","sqlstate":"42P04"},"17":{"aliases":[],"class_name":"Syntax Error or Access Rule Violation","condition_name":"duplicate_database","doc":{"anchor":"ERRCODES-APPENDIX","file":"errcodes-appendix.html","lang":"en","sha256":"868135520af87351e3ea1ba42656111cbd2d157d98e1fef05ea158ac5729d8b1","slug":"17"},"lang":"en","sqlstate":"42P04"},"18":{"aliases":[],"class_name":"Syntax Error or Access Rule 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in a PostgreSQL release definition file is established; runtime throw/use scanning is maintained 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