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Wiki / SQLSTATE

42710 — 重复对象（duplicate_object）

要定义的对象名已被占用，如重复 CREATE TYPE。

英文手册覆盖始于 PostgreSQL 8.1. 来源历史与运行验证各自保留独立版本边界。

当前阅读 PG 18·选择有来源记录的版本

8.18.28.38.49.09.19.29.39.49.59.61011121314151617181920
aliases
未知
class name
Syntax Error or Access Rule Violation
condition name
duplicate_object
lang
en
sqlstate
42710

版本定义 PG 18

42710 — 重复对象（duplicate_object）

速览 {#at-a-glance}

42710 is duplicate_object（重复对象）：定义与已占用的对象名冲突。本页选择第二次 CREATE TYPE ... AS ENUM；同一 SQLSTATE 也会用于其他对象定义，因此必须先确认对象种类和模式。

含义 {#meaning}

DefineEnum 路径报告 type "%s" already exists，这是目录定义冲突，不是行级唯一性错误。CREATE OR REPLACE 不是通用修复。检查 pg_type 与 pg_namespace、owner 和迁移顺序。选定自动提交错误后为 IDLE；显式事务必须先回滚。

诊断 {#diagnosis}

先确认对象种类和模式。类型查询 pg_type 与 pg_namespace，关系使用 to_regclass，例程检查 pg_proc 和 pg_get_function_identity_arguments；同时核对 owner 与迁移顺序。

处理 {#response}

使用确认空闲的名称，或仅在已有对象属于自己且该对象支持时执行特定 ALTER/REPLACE。案例以新 ENUM 名称修复。预检查不能消除并发创建竞争，删除未知对象不安全。显式事务中的定义失败会进入 INERROR，应先回滚或回到合适的 savepoint 再重试；本案例的自动提交路径保持 IDLE。

实测诊断 {#messages}

该 ENUM 分支的固定 ERROR 主报文没有提示；其他 42710 分支可能有不同模板，heap.c 的关系/类型提示不适用于本分支。

代表案例 {#case}

一次性案例创建 ENUM、重复定义并检查代码与状态，再创建不同名类型并核对两个目录项。

CREATE TYPE syntax_schema.duplicate_object_type AS ENUM ('first');
CREATE TYPE syntax_schema.duplicate_object_type AS ENUM ('first');
CREATE TYPE syntax_schema.duplicate_object_type_repaired AS ENUM ('first');
SELECT count(*) FROM pg_type t JOIN pg_namespace n ON n.oid = t.typnamespace WHERE n.nspname = 'syntax_schema_name' AND t.typname IN ('duplicate_object_type', 'duplicate_object_type_repaired');

选定的 18.6 与 10.21 运行均通过 SQLSTATE、严重级别、状态/恢复、修复、清理和一次性实例停止断言。详见 案例 JSON 与 作者证据；私有清单和注册表哈希也记录在其中。

版本 {#versions}

锁定目录从 7.4 存在边界起包含该条件并列出相关快照。选定自然案例已在 PostgreSQL 18.6 与 10.21 通过；这是有界观察，不能推断所有中间版本或所有源码分支。

相关 {#related}

来源 {#sources}

  • src.errcodes.REL_18_6 — fixed definition at 724edf9bde9d356724ad384a2e196edc3c9f80f7; SHA-256 6e8de346643ba84aa3c9c6a73360acfc7b2dfb89162c06c08ce9bf5bcd5bbcba (source).
  • src.duplicate-enum.18.6 — src/backend/commands/typecmds.c lines 1219–1221 at 724edf9bde9d356724ad384a2e196edc3c9f80f7; blob SHA-256 60d1e9754646e100f6b74aa367ad8c2c52386c400df721707423d329209c47eb (source).
  • src.duplicate-enum.10.23 — src/backend/commands/typecmds.c lines 1139–1141 at 02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4; blob SHA-256 fa1dfb766f7a3117eb677461ede774d5ba7c25324cbbd2a200435fa9c9c8e863 (source).
  • src.calls.REL_18_6 / src.calls.REL_10_23 — fixed call scans, SHA-256 9ee8a0e81d8f0825c5c1ae45583439859a26e602bdd4ce2f2a62aa278867ccbf / 00d16d3eb01b71ccf1b245c8f3102f9d0ec9f36fb02777b8dd1b99fcb263040c.
  • manifest.42710 / snippet-registry.42710 — hashes are recorded in evidence/42710.json and each runtime record.

比较版本

SQLSTATE 证据与已记录的运行版本

cases · duplicate_object_type
{
  "assertions": [
    "SQLSTATE is 42710 with the duplicate type message and its naming hint",
    "The failed autocommit session remains IDLE",
    "Creating a nonconflicting type and inspecting pg_type succeeds"
  ],
  "case_id": "duplicate_object_type",
  "cleanup": "Drop the runner schema and all types it owns.",
  "has_snippet": true,
  "position": 0,
  "preconditions": [
    "A runner-owned disposable target is provisioned."
  ],
  "repair": "Use a distinct type name after confirming the existing type; do not drop an unknown owner's object.",
  "trigger": "Create the same ENUM type name twice in the runner schema.",
  "versions": [
    "10",
    "18"
  ]
}
claims · identity.class-and-condition
{
  "claim_id": "identity.class-and-condition",
  "limits": "Identity does not identify every backend call that can reuse this SQLSTATE.",
  "method": "Read fixed errcodes.txt and locked catalogue metadata.",
  "position": 0,
  "runtime": [],
  "sources": [
    "src.errcodes.REL_18_6"
  ],
  "statement": "42710 is the duplicate_object condition in Class 42."
}
claims · mechanism.selected-source-path
{
  "claim_id": "mechanism.selected-source-path",
  "limits": "This is one mechanism boundary, not an exhaustive inventory of the code.",
  "method": "Trace the REL_18_6 and REL_10_23 source-call records at the locked commits.",
  "position": 1,
  "runtime": [],
  "sources": [
    "src.duplicate-enum.18.6",
    "src.duplicate-enum.10.23"
  ],
  "statement": "The selected duplicate_object_type follows a resolved PostgreSQL source-call group; other branches can use different dynamic fields."
}
claims · mechanism.reader-boundary
{
  "claim_id": "mechanism.reader-boundary",
  "limits": "The claim describes the selected path and does not generalize to every branch sharing this SQLSTATE.",
  "method": "Combine the selected source call, registry SQL, and passed structured assertions.",
  "position": 2,
  "runtime": [],
  "sources": [
    "src.duplicate-enum.18.6",
    "src.duplicate-enum.10.23",
    "snippet-registry.42710"
  ],
  "statement": "ENUM type definitions collide by name; inspect pg_type/pg_namespace and use a deliberate distinct name."
}
claims · runtime.representative-case
{
  "claim_id": "runtime.representative-case",
  "limits": "Scope is limited to these statements, psycopg, and two versions.",
  "method": "Run the shared SQL registry and inspect SQLSTATE, severity, state, repair, cleanup, and target stop.",
  "position": 3,
  "runtime": [
    "runtime.syntax2-42710-latest2.latest",
    "runtime.syntax2-42710-pg10.pg10"
  ],
  "sources": [
    "manifest.42710",
    "snippet-registry.42710"
  ],
  "statement": "The selected duplicate_object_type passed on isolated PostgreSQL 18.6 and 10.21 targets."
}
claims · versions.catalogue-boundary
{
  "claim_id": "versions.catalogue-boundary",
  "limits": "Definition presence is not an exact behavioral introduction; two runtime versions do not prove every intermediate behavior.",
  "method": "Read generated facts, fixed calls, and selected summaries.",
  "position": 4,
  "runtime": [],
  "sources": [
    "src.errcodes.REL_18_6",
    "src.calls.REL_18_6",
    "src.calls.REL_10_23"
  ],
  "statement": "The locked catalogue records 42710 from the 7.4 presence bound through the listed snapshots; runtime scope is 18.6 and 10.21."
}
messages · message.duplicate_object_type
{
  "limits": "",
  "message_id": "message.duplicate_object_type",
  "path": "",
  "position": 0,
  "raw": {
    "id": "message.duplicate_object_type",
    "primary_template": "type \"%s\" already exists",
    "severity_source": "explicit ERROR",
    "sources": [
      "src.duplicate-enum.18.6",
      "src.duplicate-enum.10.23"
    ],
    "sqlstate": "42710"
  },
  "severity": "explicit ERROR",
  "sources": [
    "src.duplicate-enum.18.6",
    "src.duplicate-enum.10.23"
  ],
  "templates": [
    {
      "kind": "primary",
      "literal": "type \" \" already exists",
      "position": 0,
      "role": "",
      "template": "type \"%s\" already exists"
    }
  ]
}
runtimes · runtime.syntax2-42710-latest2.latest · 18.6 (Homebrew) · passed
{
  "cases": [
    "duplicate_object_type"
  ],
  "limits": "",
  "position": 0,
  "raw": {
    "assertions": [
      {
        "expected": "42710",
        "name": "42710 SQLSTATE",
        "observed": "42710",
        "passed": true
      },
      {
        "expected": "ERROR",
        "name": "42710 ERROR severity",
        "observed": "ERROR",
        "passed": true
      },
      {
        "expected": "type \"duplicate_object_type\" already exists",
        "name": "42710 primary diagnostic",
        "observed": "type \"duplicate_object_type\" already exists",
        "passed": true
      },
      {
        "expected": "IDLE",
        "name": "duplicate type leaves autocommit session usable",
        "observed": "IDLE",
        "passed": true
      },
      {
        "expected": {
          "status": "IDLE",
          "types": 2
        },
        "name": "nonconflicting type name repairs definition",
        "observed": {
          "error": true,
          "status": "IDLE",
          "types": 2
        },
        "passed": true
      }
    ],
    "case_manifest": {
      "id": "manifest.42710",
      "kind": "local_artifact",
      "path": "verify/cases/42710/cases.json",
      "sha256": "e1a0995c62ad92498ded1bd168d5473c915f688f4e932ea5d1ead43323444ebb",
      "source_role": "case_manifest"
    },
    "cases": [
      "duplicate_object_type"
    ],
    "cleanup": {
      "errors": [],
      "passed": true
    },
    "environment": {
      "TimeZone": "Asia/Shanghai",
      "backend_pid": 29705,
      "binary": {
        "bindir": "/opt/homebrew/Cellar/postgresql@18/18.6/bin",
        "pg_config": "/opt/homebrew/bin/pg_config",
        "pg_config_version": "PostgreSQL 18.6 (Homebrew)",
        "postgres": "/opt/homebrew/Cellar/postgresql@18/18.6/bin/postgres"
      },
      "connection_scope": "runner-owned localhost port",
      "current_user": "runner",
      "docker": {},
      "lc_messages": "C",
      "libpq_version": "18.6",
      "locale": "C.UTF-8",
      "log_destination": "csvlog,jsonlog",
      "log_error_verbosity": "verbose",
      "log_min_error_statement": "error",
      "log_min_messages": "error",
      "logging_collector": "on",
      "machine": "arm64",
      "max_connections": "100",
      "platform": "macOS-26.6.2-arm64-arm-64bit-Mach-O",
      "psycopg_version": "3.3.5",
      "python_version": "3.14.6 (main, Jun 10 2026, 10:03:53) [Clang 21.0.0 (clang-2100.0.123.102)]",
      "server_encoding": "UTF8",
      "server_version": "18.6 (Homebrew)",
      "server_version_num": "180006",
      "target_kind": "latest",
      "wal_level": "logical"
    },
    "id": "runtime.syntax2-42710-latest2.latest",
    "observed": {
      "connection_autocommit": true,
      "diagnostic": {
        "column_name": null,
        "constraint_name": null,
        "context": null,
        "datatype_name": null,
        "exception_type": "DuplicateObject",
        "internal_position": null,
        "internal_query": null,
        "message_detail": null,
        "message_hint": null,
        "message_primary": "type \"duplicate_object_type\" already exists",
        "schema_name": null,
        "severity": "ERROR",
        "severity_nonlocalized": "ERROR",
        "source_file": "typecmds.c",
        "source_function": "DefineEnum",
        "source_line": "1221",
        "sqlstate": "42710",
        "statement_position": null,
        "table_name": null,
        "text": "type \"duplicate_object_type\" already exists"
      },
      "failed_status": "IDLE",
      "repair_status": "IDLE",
      "type_count": 2
    },
    "raw": "verify/results/syntax2-42710-latest2/latest/raw.jsonl",
    "raw_sha256": "8ea85c4db8480cc96261acfd58ac9ff67c0f95ea73d5ca59889c909883829782",
    "run_id": "syntax2-42710-latest2",
    "server_version": "18.6 (Homebrew)",
    "server_version_num": 180006,
    "snippet_registry": {
      "id": "snippet-registry.42710",
      "kind": "local_artifact",
      "path": "verify/cases/42710/snippets.json",
      "sha256": "4dbc1b9fe7efb15ec5ff4bcb2a31e9335c9e9df1fdd51ab494917007f52ce3c5",
      "source_role": "snippet_registry"
    },
    "status": "passed",
    "summary": "verify/results/syntax2-42710-latest2/latest/summary.json",
    "summary_sha256": "dba3c477be2c7d8c1c6e9256f75617cb8f300c761981c88f5905c9af53fb4a33",
    "target": "latest",
    "target_stop": {
      "argv": [
        "/opt/homebrew/Cellar/postgresql@18/18.6/bin/pg_ctl",
        "-D",
        "/Users/vonng/pgcenter/err-code/.cache/runtime/syntax2-42710-latest2/latest/data",
        "-m",
        "fast",
        "-w",
        "stop"
      ],
      "elapsed_seconds": 0.112,
      "returncode": 0,
      "stderr": "",
      "stdout": "waiting for server to shut down.... done\nserver stopped\n"
    }
  },
  "run_id": "syntax2-42710-latest2",
  "runtime_id": "runtime.syntax2-42710-latest2.latest",
  "server_version": "18.6 (Homebrew)",
  "status": "passed",
  "target": "latest"
}
runtimes · runtime.syntax2-42710-pg10.pg10 · 10.21 (Debian 10.21-1.pgdg90+1) · passed
{
  "cases": [
    "duplicate_object_type"
  ],
  "limits": "",
  "position": 1,
  "raw": {
    "assertions": [
      {
        "expected": "42710",
        "name": "42710 SQLSTATE",
        "observed": "42710",
        "passed": true
      },
      {
        "expected": "ERROR",
        "name": "42710 ERROR severity",
        "observed": "ERROR",
        "passed": true
      },
      {
        "expected": "type \"duplicate_object_type\" already exists",
        "name": "42710 primary diagnostic",
        "observed": "type \"duplicate_object_type\" already exists",
        "passed": true
      },
      {
        "expected": "IDLE",
        "name": "duplicate type leaves autocommit session usable",
        "observed": "IDLE",
        "passed": true
      },
      {
        "expected": {
          "status": "IDLE",
          "types": 2
        },
        "name": "nonconflicting type name repairs definition",
        "observed": {
          "error": true,
          "status": "IDLE",
          "types": 2
        },
        "passed": true
      }
    ],
    "case_manifest": {
      "id": "manifest.42710",
      "kind": "local_artifact",
      "path": "verify/cases/42710/cases.json",
      "sha256": "e1a0995c62ad92498ded1bd168d5473c915f688f4e932ea5d1ead43323444ebb",
      "source_role": "case_manifest"
    },
    "cases": [
      "duplicate_object_type"
    ],
    "cleanup": {
      "errors": [],
      "passed": true
    },
    "environment": {
      "TimeZone": "Etc/UTC",
      "backend_pid": 79,
      "binary": {},
      "connection_scope": "runner-owned localhost port",
      "current_user": "postgres",
      "docker": {
        "architecture": "arm64",
        "command": "/usr/local/bin/docker",
        "digest": "sha256:b2baf8998630663d21370da06387c950e587071bdd307ee34e661cdcc7442bcc",
        "id": "sha256:b2baf8998630663d21370da06387c950e587071bdd307ee34e661cdcc7442bcc",
        "image": "postgres:10",
        "image_created": "2022-06-23T09:11:18.374607054Z",
        "image_ref": "postgres@sha256:b2baf8998630663d21370da06387c950e587071bdd307ee34e661cdcc7442bcc",
        "log_destination": "csvlog",
        "os": "linux",
        "repo_digests": [
          "postgres@sha256:b2baf8998630663d21370da06387c950e587071bdd307ee34e661cdcc7442bcc"
        ]
      },
      "lc_messages": "en_US.utf8",
      "libpq_version": "18.6",
      "locale": "C.UTF-8",
      "log_destination": "csvlog",
      "log_error_verbosity": "verbose",
      "log_min_error_statement": "error",
      "log_min_messages": "error",
      "logging_collector": "on",
      "machine": "arm64",
      "max_connections": "100",
      "platform": "macOS-26.6.2-arm64-arm-64bit-Mach-O",
      "psycopg_version": "3.3.5",
      "python_version": "3.14.6 (main, Jun 10 2026, 10:03:53) [Clang 21.0.0 (clang-2100.0.123.102)]",
      "server_encoding": "UTF8",
      "server_version": "10.21 (Debian 10.21-1.pgdg90+1)",
      "server_version_num": "100021",
      "target_kind": "pg10",
      "wal_level": "logical"
    },
    "id": "runtime.syntax2-42710-pg10.pg10",
    "observed": {
      "connection_autocommit": true,
      "diagnostic": {
        "column_name": null,
        "constraint_name": null,
        "context": null,
        "datatype_name": null,
        "exception_type": "DuplicateObject",
        "internal_position": null,
        "internal_query": null,
        "message_detail": null,
        "message_hint": null,
        "message_primary": "type \"duplicate_object_type\" already exists",
        "schema_name": null,
        "severity": "ERROR",
        "severity_nonlocalized": "ERROR",
        "source_file": "typecmds.c",
        "source_function": "DefineEnum",
        "source_line": "1141",
        "sqlstate": "42710",
        "statement_position": null,
        "table_name": null,
        "text": "type \"duplicate_object_type\" already exists"
      },
      "failed_status": "IDLE",
      "repair_status": "IDLE",
      "type_count": 2
    },
    "raw": "verify/results/syntax2-42710-pg10/pg10/raw.jsonl",
    "raw_sha256": "a66df6911c3b1985953a097e11cdd5015be79742b4baf3e295bc6cf5e194d2b4",
    "run_id": "syntax2-42710-pg10",
    "server_version": "10.21 (Debian 10.21-1.pgdg90+1)",
    "server_version_num": 100021,
    "snippet_registry": {
      "id": "snippet-registry.42710",
      "kind": "local_artifact",
      "path": "verify/cases/42710/snippets.json",
      "sha256": "4dbc1b9fe7efb15ec5ff4bcb2a31e9335c9e9df1fdd51ab494917007f52ce3c5",
      "source_role": "snippet_registry"
    },
    "status": "passed",
    "summary": "verify/results/syntax2-42710-pg10/pg10/summary.json",
    "summary_sha256": "f334cd92f6f8b68f32cf54c2f2c94733e9560d6c3a4a6a655ebcbda633e73ce5",
    "target": "pg10",
    "target_stop": {
      "cleanup": {
        "argv": [
          "/usr/local/bin/docker",
          "rm",
          "-f",
          "-v",
          "sqlstate42710_syntax242710pg10_pg10"
        ],
        "elapsed_seconds": 0.284,
        "returncode": 0,
        "stderr": "",
        "stdout": "sqlstate42710_syntax242710pg10_pg10\n"
      },
      "inspect": {
        "argv": [
          "/usr/local/bin/docker",
          "inspect",
          "sqlstate42710_syntax242710pg10_pg10"
        ],
        "elapsed_seconds": 0.019,
        "returncode": 0,
        "stderr": "",
        "stdout": "[\n    {\n        \"Id\": \"eae5e7ed2ee2a1ce3d4c7adc62ca55b40e46da008f5754aa3335cacf714ddc8c\",\n        \"Created\": \"2026-09-09T16:39:55.588704797Z\",\n        \"Path\": \"docker-entrypoint.sh\",\n        \"Args\": [\n            \"postgres\",\n            \"-c\",\n            \"listen_addresses=*\",\n            \"-c\",\n            \"log_destination=csvlog\",\n            \"-c\",\n            \"logging_collector=on\",\n            \"-c\",\n            \"log_directory=log\",\n            \"-c\",\n            \"log_filename=postgresql-%Y%m%d%H%M%S.log\",\n            \"-c\",\n            \"log_min_messages=error\",\n            \"-c\",\n            \"log_min_error_statement=error\",\n            \"-c\",\n            \"log_error_verbosity=verbose\",\n            \"-c\",\n            \"wal_level=logical\",\n            \"-c\",\n            \"max_wal_senders=10\",\n            \"-c\",\n            \"max_replication_slots=10\"\n        ],\n        \"State\": {\n            \"Status\": \"running\",\n            \"Running\": true,\n            \"Paused\": false,\n            \"Restarting\": false,\n            \"OOMKilled\": false,\n            \"Dead\": false,\n            \"Pid\": 61978,\n            \"ExitCode\": 0,\n            \"Error\": \"\",\n            \"StartedAt\": \"2026-09-09T16:39:55.676537255Z\",\n            \"FinishedAt\": \"0001-01-01T00:00:00Z\"\n        },\n        \"Image\": \"sha256:b2baf8998630663d21370da06387c950e587071bdd307ee34e661cdcc7442bcc\",\n        \"ResolvConfPath\": \"/var/lib/docker/containers/eae5e7ed2ee2a1ce3d4c7adc62ca55b40e46da008f5754aa3335cacf714ddc8c/resolv.conf\",\n        \"HostnamePath\": \"/var/lib/docker/containers/eae5e7ed2ee2a1ce3d4c7adc62ca55b40e46da008f5754aa3335cacf714ddc8c/hostname\",\n        \"HostsPath\": \"/var/lib/docker/containers/eae5e7ed2ee2a1ce3d4c7adc62ca55b40e46da008f5754aa3335cacf714ddc8c/hosts\",\n        \"LogPath\": 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sources · src.errcodes.REL_18_6
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sources · src.calls.REL_18_6
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sources · src.calls.REL_10_23
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sources · src.duplicate-enum.18.6
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sources · src.duplicate-enum.10.23
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sources · manifest.42710
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sources · snippet-registry.42710
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}

来源引用

完整定义与证据 JSON

定义来源

center · PostgreSQL 18 · english-manuals:98e10ea171dd89a00bd0886e01479413fa364d9f946b5243bfdddfc9b05eeb1d

正文语言: zh-Hans · english-manuals:98e10ea171dd89a00bd0886e01479413fa364d9f946b5243bfdddfc9b05eeb1d