{
  "id": "python/sqlalchemy-missing-session-rollback-after-error",
  "signature": "sqlalchemy.exc.InvalidRequestError: This session is in 'prepared' state; no further SQL can be emitted within this transaction.",
  "signature_zh": "sqlalchemy.exc.InvalidRequestError: 此会话处于 'prepared' 状态；在此事务中无法再发出 SQL。",
  "regex": "sqlalchemy\\.exc\\.InvalidRequestError:\\ This\\ session\\ is\\ in\\ 'prepared'\\ state;\\ no\\ further\\ SQL\\ can\\ be\\ emitted\\ within\\ this\\ transaction\\.",
  "domain": "python",
  "category": "runtime_error",
  "subcategory": null,
  "root_cause": "After a failed commit, the session enters a 'prepared' state (two-phase commit) and requires rollback before further operations.",
  "root_cause_type": "generic",
  "root_cause_zh": "提交失败后，会话进入 'prepared' 状态（两阶段提交），需要回滚后才能进行后续操作。",
  "versions": [
    {
      "version": "1.4.x",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "2.0.x",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "The session is stuck; a rollback is required first.",
      "fail_rate": 1.0,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "May leave database locks or transactions hanging.",
      "fail_rate": 0.7,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "",
      "success_rate": 0.95,
      "how": "Call session.rollback() after catching any commit exception: try: session.commit() except: session.rollback() raise",
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "success_rate": 0.9,
      "how": "Use session.begin() context manager which auto-rolls-back on exception.",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": null,
  "official_doc_section": null,
  "error_code": null,
  "verification_tier": "ai_generated",
  "confidence": 0.84,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2024-06-20",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}