feat: Phase1安全基线 — 风险等级+审核超时+执行进度+通知脱敏+高危确认+维护窗口 (1119测试)

新增功能:
- ticket_sql_items模型: 逐条SQL执行记录(状态/耗时/影响行数)
- risk_evaluator.py: 4级风险评估(low/medium/high/critical), 支持MySQL/PG/Redis/Mongo
- Ticket模型: 新增risk_level + workflow_id字段
- 审核引擎签名改造: audit(sql, db_type, instance_id=None) 支持EXPLAIN预检
- 审核超时保护: 10s超时跳过审核, 防止工单创建阻塞
- 工单创建自动风险计算 + 审批流匹配(instance.workflow_id优先)
- SQL items查询API: GET /{ticket_id}/sql-items 含进度统计
- 执行器集成: 执行完成后自动更新SQL items逐条状态
- 通知脱敏: password/secret/token自动掩码, SQL预览截断100字符
- 高危操作强制二次确认: high/critical级别需confirmed=true
- 维护窗口控制: system_settings配置执行时间窗口(支持跨午夜)
- 45个新测试: 风险评估24+通知脱敏5+维护窗口2+SQL分类11+配置2

backend/app/api/v1/endpoints/ticket.py

@@ -56,6 +56,129 @@ def _generate_ticket_no(ticket_id: int) -> str:
     seq = str(ticket_id).zfill(3)[-3:]  # ID 补齐到3位
     return f"{base}{ms}{seq}"
 
+
+def _classify_sql_type(sql: str) -> str:
+    """根据单条 SQL 语句判断类型。"""
+    s = sql.strip().upper()
+    if s.startswith(("SELECT", "SHOW", "EXPLAIN", "DESC", "DESCRIBE")):
+        return "DQL"
+    if s.startswith(("INSERT", "UPDATE", "DELETE", "REPLACE")):
+        return "DML"
+    if s.startswith(("CREATE", "ALTER", "DROP", "RENAME", "TRUNCATE")):
+        return "DDL"
+    if s.startswith(("GRANT", "REVOKE")):
+        return "DCL"
+    if s.startswith(("SET", "GET", "HSET", "HMSET", "LPUSH", "RPUSH", "SADD", "ZADD", "DEL", "FLUSHDB", "FLUSHALL")):
+        return "SET"
+    return "OTHER"
+
+
+async def _update_sql_items_from_report(db, ticket_id: int, report) -> None:
+    """根据执行报告更新 SQL items 状态。"""
+    from app.models.ticket_sql_item import TicketSqlItem
+
+    result = await db.execute(
+        select(TicketSqlItem)
+        .where(TicketSqlItem.ticket_id == ticket_id)
+        .order_by(TicketSqlItem.seq)
+    )
+    items = result.scalars().all()
+    if not items:
+        return
+
+    if report.status == "success":
+        for item in items:
+            item.status = "success"
+            item.finished_at = datetime.now(timezone.utc)
+    else:
+        # 尝试从 raw_output 解析逐条结果
+        exec_errors = getattr(report, "errors", [])
+        error_stmt = ""
+        if exec_errors:
+            err_msg = str(exec_errors[0]) if exec_errors else ""
+            # 找到出错的语句
+            for item in items:
+                if item.status == "pending":
+                    if not error_stmt:
+                        item.status = "failed"
+                        item.error_message = err_msg
+                        item.finished_at = datetime.now(timezone.utc)
+                        error_stmt = item.sql_text[:50]
+                    else:
+                        item.status = "skipped"
+
+    await db.flush()
+
+
+async def _mark_sql_items_failed(db, ticket_id: int, error_msg: str) -> None:
+    """标记所有 pending 的 SQL items 为 failed。"""
+    from app.models.ticket_sql_item import TicketSqlItem
+
+    result = await db.execute(
+        select(TicketSqlItem)
+        .where(
+            TicketSqlItem.ticket_id == ticket_id,
+            TicketSqlItem.status == "pending",
+        )
+    )
+    items = result.scalars().all()
+    for item in items:
+        item.status = "failed"
+        item.error_message = error_msg[:500]
+        item.finished_at = datetime.now(timezone.utc)
+    await db.flush()
+
+
+async def _check_maintenance_window(db) -> Optional[str]:
+    """检查当前是否在维护窗口内。
+
+    Returns:
+        None = 允许执行（无窗口限制或在窗口内）
+        str = 窗口描述（表示不在窗口内，不允许执行）
+    """
+    from app.models.system_setting import SystemSetting
+    result = await db.execute(
+        select(SystemSetting).where(SystemSetting.key == "maintenance_window")
+    )
+    setting = result.scalar_one_or_none()
+    if not setting or not setting.value:
+        return None  # 无配置，不限制
+
+    import json as _json
+    try:
+        window = _json.loads(setting.value) if isinstance(setting.value, str) else setting.value
+    except Exception:
+        return None
+
+    enabled = window.get("enabled", False)
+    if not enabled:
+        return None
+
+    # 格式: {"enabled": true, "start": "22:00", "end": "06:00", "days": ["mon","tue","wed","thu","fri"]}
+    start_time = window.get("start", "22:00")
+    end_time = window.get("end", "06:00")
+    days = window.get("days", [])  # 空=每天
+
+    now = datetime.now()
+    current_day = now.strftime("%a").lower()[:3]
+    current_time = now.strftime("%H:%M")
+
+    # 检查星期
+    if days and current_day not in [d.lower()[:3] for d in days]:
+        return f"{start_time}-{end_time} ({'/'.join(days)})"
+
+    # 检查时间（支持跨午夜）
+    if start_time <= end_time:
+        if not (start_time <= current_time <= end_time):
+            return f"{start_time}-{end_time}"
+    else:
+        # 跨午夜: 22:00-06:00 意味着 22:00~24:00 或 00:00~06:00
+        if not (current_time >= start_time or current_time <= end_time):
+            return f"{start_time}-{end_time}（次日）"
+
+    return None  # 在窗口内，允许执行
+
+
 if TYPE_CHECKING:
     from app.services.ticket_executor import ExecutionReport
 
@@ -144,6 +267,8 @@ async def _enrich_ticket(ticket: Ticket, db: AsyncSession) -> Dict[str, Any]:
         "rollback_sql": ticket.rollback_sql,
         "status": ticket.status,
         "priority": ticket.priority,
+        "risk_level": getattr(ticket, "risk_level", "low"),
+        "workflow_id": getattr(ticket, "workflow_id", None),
         "applicant_id": ticket.applicant_id,
         "approver_id": ticket.approver_id,
         "reason": ticket.reason,
@@ -373,27 +498,57 @@ async def create_ticket(
     # 3. 验证工单内容安全性
     _validate_ticket_content(data)
 
-    # 4. 自动审核 SQL
+    # 4. 自动审核 SQL（带超时保护）
     env = "production" if instance.env == "production" else "development"
     v2_engine = SQLAuditEngineV2(db_session=db, env=env)
+    import asyncio as _asyncio
     try:
-        v2_report = await v2_engine.audit(data.sql_content, db_type=data.db_type)
+        v2_report = await _asyncio.wait_for(
+            v2_engine.audit(data.sql_content, db_type=data.db_type, instance_id=data.instance_id),
+            timeout=10.0,
+        )
+    except _asyncio.TimeoutError:
+        logger.warning("SQL 审核超时(10s)，跳过审核: ticket title=%s", data.title)
+        v2_report = None
     except Exception as e:
         logger.error("SQL 审核失败: %s", e)
         v2_report = None
 
-    # 5. 检查是否有默认审批流
-    default_wf_result = await db.execute(
-        select(WorkflowDefinition).where(
-            WorkflowDefinition.is_default == True,
-            WorkflowDefinition.is_active == True,
-        )
+    # 5. 计算风险等级
+    from app.services.risk_evaluator import evaluate_risk_level
+    audit_findings_raw = v2_report.to_dict().get("findings", []) if v2_report else []
+    import sqlparse as _sqlparse
+    stmt_list = [s.strip() for s in _sqlparse.split(data.sql_content) if s.strip()]
+    risk_level = evaluate_risk_level(
+        sql_content=data.sql_content,
+        db_type=data.db_type,
+        sql_type=data.sql_type or "",
+        audit_findings=audit_findings_raw,
+        statement_count=len(stmt_list),
     )
-    default_workflow = default_wf_result.scalar_one_or_none()
 
-    initial_status = TicketStatus.REVIEWING.value if default_workflow else TicketStatus.PENDING.value
+    # 6. 匹配审批流 — 优先按 instance.workflow_id，其次按 risk_level 匹配默认流
+    workflow = None
+    if instance.workflow_id:
+        wf_result = await db.execute(
+            select(WorkflowDefinition).where(
+                WorkflowDefinition.id == instance.workflow_id,
+                WorkflowDefinition.is_active == True,
+            )
+        )
+        workflow = wf_result.scalar_one_or_none()
+    if not workflow:
+        default_wf_result = await db.execute(
+            select(WorkflowDefinition).where(
+                WorkflowDefinition.is_default == True,
+                WorkflowDefinition.is_active == True,
+            )
+        )
+        workflow = default_wf_result.scalar_one_or_none()
 
-    # 6. 创建工单
+    initial_status = TicketStatus.REVIEWING.value if workflow else TicketStatus.PENDING.value
+
+    # 7. 创建工单
     ticket = Ticket(
         title=data.title,
         db_type=data.db_type,
@@ -403,6 +558,8 @@ async def create_ticket(
         rollback_sql=data.rollback_sql,
         reason=data.reason,
         priority=data.priority,
+        risk_level=risk_level,
+        workflow_id=workflow.id if workflow else None,
         applicant_id=current_user.id,
         status=initial_status,
         audit_result=json.dumps(v2_report.to_dict(), ensure_ascii=False) if v2_report and v2_report.findings else None,
@@ -416,10 +573,10 @@ async def create_ticket(
     await db.flush()
 
     # 7. 创建审批步骤（多级审批流）
-    if default_workflow:
+    if workflow:
         wf_steps_result = await db.execute(
             select(WorkflowStep)
-            .where(WorkflowStep.workflow_id == default_workflow.id)
+            .where(WorkflowStep.workflow_id == workflow.id)
             .order_by(WorkflowStep.step_number)
         )
         wf_steps = wf_steps_result.scalars().all()
@@ -434,7 +591,21 @@ async def create_ticket(
             db.add(approval)
         await db.flush()
 
-    # 8. 记录审计日志
+    # 8. 创建 SQL 逐条执行记录
+    from app.models.ticket_sql_item import TicketSqlItem
+    for i, stmt in enumerate(stmt_list, start=1):
+        stmt_type = _classify_sql_type(stmt)
+        sql_item = TicketSqlItem(
+            ticket_id=ticket.id,
+            seq=i,
+            sql_text=stmt,
+            sql_type=stmt_type,
+            status="pending",
+        )
+        db.add(sql_item)
+    await db.flush()
+
+    # 9. 记录审计日志
     audit_detail = ""
     if v2_report:
         audit_detail = f"SQL审核评分: {v2_report.score}, 通过: {v2_report.passed}, 规则数: {len(v2_report.findings)}"
@@ -776,6 +947,51 @@ async def get_ticket_timeline(
     return {"ticket_id": ticket_id, "timeline": timeline}
 
 
+@router.get("/{ticket_id}/sql-items")
+async def get_ticket_sql_items(
+    ticket_id: int,
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(get_current_user),
+):
+    """获取工单 SQL 逐条执行进度。"""
+    from app.models.ticket_sql_item import TicketSqlItem
+
+    result = await db.execute(
+        select(TicketSqlItem)
+        .where(TicketSqlItem.ticket_id == ticket_id)
+        .order_by(TicketSqlItem.seq)
+    )
+    items = result.scalars().all()
+
+    return {
+        "ticket_id": ticket_id,
+        "total": len(items),
+        "items": [
+            {
+                "id": item.id,
+                "seq": item.seq,
+                "sql_text": item.sql_text,
+                "sql_type": item.sql_type,
+                "status": item.status,
+                "affected_rows": item.affected_rows,
+                "duration_ms": item.duration_ms,
+                "error_message": item.error_message,
+                "started_at": item.started_at.isoformat() if item.started_at else None,
+                "finished_at": item.finished_at.isoformat() if item.finished_at else None,
+            }
+            for item in items
+        ],
+        "progress": {
+            "total": len(items),
+            "success": sum(1 for i in items if i.status == "success"),
+            "failed": sum(1 for i in items if i.status == "failed"),
+            "running": sum(1 for i in items if i.status == "running"),
+            "pending": sum(1 for i in items if i.status == "pending"),
+            "skipped": sum(1 for i in items if i.status == "skipped"),
+        },
+    }
+
+
 @router.post("/{ticket_id}/cancel")
 async def cancel_ticket(
     ticket_id: int,
@@ -910,12 +1126,32 @@ async def execute_ticket(
     if confirm and not confirm.confirmed:
         raise HTTPException(status_code=400, detail="未确认执行，操作已取消")
 
+    # 3.1 高危操作强制二次确认
+    risk_level = getattr(ticket, "risk_level", "low")
+    if risk_level in ("high", "critical"):
+        if not confirm or not confirm.confirmed:
+            from app.services.risk_evaluator import RISK_LEVEL_CONFIG
+            risk_cfg = RISK_LEVEL_CONFIG.get(risk_level, {})
+            raise HTTPException(
+                status_code=409,
+                detail=f"该工单风险等级为「{risk_cfg.get('label', risk_level)}」，需要二次确认后才能执行。请传入 confirmed=true",
+            )
+
     # 4. 查询数据源实例
     instance = await _get_instance(db, ticket.instance_id)
 
     # 5. 权限检查
     await check_instance_permission(current_user, instance, "ticket:execute", db)
 
+    # 5.1 维护窗口检查 — 非定时工单检查是否在维护窗口内
+    if not ticket.scheduled_at:
+        maintenance_window = await _check_maintenance_window(db)
+        if maintenance_window:
+            raise HTTPException(
+                status_code=403,
+                detail=f"当前不在维护窗口内，允许执行时间: {maintenance_window}",
+            )
+
     # 6. 定时执行：如果 scheduled_at 在未来，改为 scheduled 状态
     if ticket.scheduled_at:
         now = datetime.now(timezone.utc)
@@ -971,6 +1207,9 @@ async def execute_ticket(
         ticket.execute_result = report.to_json()
         ticket.execute_time = datetime.now(timezone.utc)
 
+        # 8.1 更新 SQL 逐条执行记录
+        await _update_sql_items_from_report(db, ticket.id, report)
+
         # 9. 记录执行日志
         log_detail = (
             f"执行结果: {report.status}, 影响行数: {report.affected_rows}, "
@@ -1006,6 +1245,9 @@ async def execute_ticket(
         }, ensure_ascii=False)
         ticket.execute_time = datetime.now(timezone.utc)
 
+        # 标记所有 pending SQL items 为 failed
+        await _mark_sql_items_failed(db, ticket.id, str(e))
+
         await AuditLogService.log(
             db,
             user_id=current_user.id,

backend/app/models/__init__.py

@@ -1,3 +1,4 @@
 from app.models.instance_group import InstanceGroup, user_groups, instance_group_members  # noqa: F401
 from app.models.system_setting import SystemSetting  # noqa: F401
 from app.models.query_history import QueryHistory, QuickQueryModel  # noqa: F401
+from app.models.ticket_sql_item import TicketSqlItem  # noqa: F401

backend/app/models/ticket.py

@@ -16,6 +16,8 @@ class Ticket(Base):
     rollback_sql = Column(Text, nullable=True)
     status = Column(String(20), default="pending")  # pending / reviewing / approved / rejected / executing / success / failed
     priority = Column(String(10), default="medium")  # high / medium / low
+    risk_level = Column(String(20), default="low", comment="自动风险等级: low/medium/high/critical")
+    workflow_id = Column(Integer, ForeignKey("workflow_definitions.id"), nullable=True, comment="关联审批流")
     applicant_id = Column(Integer, ForeignKey("users.id"), nullable=False)
     approver_id = Column(Integer, ForeignKey("users.id"), nullable=True)
     reason = Column(Text, nullable=True)

backend/app/models/ticket_sql_item.py

@@ -0,0 +1,28 @@
+"""工单 SQL 逐条执行记录 — 支持执行进度透明展示。
+
+每条 SQL 单独记录执行状态、耗时、影响行数、错误信息。
+"""
+
+from sqlalchemy import Column, Integer, String, Text, DateTime, ForeignKey, func
+from sqlalchemy.orm import relationship
+
+from app.core.database import Base
+
+
+class TicketSqlItem(Base):
+    __tablename__ = "ticket_sql_items"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    ticket_id = Column(Integer, ForeignKey("tickets.id"), nullable=False, index=True)
+    seq = Column(Integer, nullable=False, comment="SQL 顺序号，从 1 开始")
+    sql_text = Column(Text, nullable=False, comment="单条 SQL 文本")
+    sql_type = Column(String(20), nullable=True, comment="SQL 类型: DDL/DML/DQL/SET 等")
+    status = Column(String(20), default="pending", comment="pending/running/success/failed/skipped")
+    affected_rows = Column(Integer, default=0)
+    duration_ms = Column(Integer, default=0, comment="执行耗时（毫秒）")
+    error_message = Column(Text, nullable=True)
+    started_at = Column(DateTime, nullable=True)
+    finished_at = Column(DateTime, nullable=True)
+    created_at = Column(DateTime, server_default=func.now())
+
+    ticket = relationship("Ticket", backref="sql_items")

backend/app/schemas/ticket.py

@@ -9,6 +9,7 @@ class TicketCreate(BaseModel):
     instance_id: int
     target_database: str = Field(..., min_length=1)
     sql_content: str = Field(..., min_length=1)
+    sql_type: Optional[str] = None
     rollback_sql: Optional[str] = None
     reason: str = Field(..., min_length=5)
     priority: Literal["high", "medium", "low"] = "medium"
@@ -32,6 +33,8 @@ class TicketResponse(BaseModel):
     rollback_sql: Optional[str] = None
     status: str
     priority: str
+    risk_level: Optional[str] = "low"
+    workflow_id: Optional[int] = None
     applicant_id: int
     applicant_name: Optional[str] = None
     approver_id: Optional[int] = None

backend/app/services/audit_engine_v2.py

@@ -116,6 +116,7 @@ class AuditReportV2:
     sql: str
     findings: List[AuditFindingV2] = field(default_factory=list)
     db_type: str = "mysql"
+    extra_info: Dict[str, Any] = field(default_factory=dict)
 
     @property
     def passed(self) -> bool:
@@ -1633,7 +1634,9 @@ class SQLAuditEngineV2:
             return rules
         return [(r, f) for r, f in rules if r.db_type in ("all", db_type)]
 
-    async def audit(self, sql: str, db_type: str = "mysql") -> AuditReportV2:
+    async def audit(
+        self, sql: str, db_type: str = "mysql", instance_id: Optional[int] = None
+    ) -> AuditReportV2:
         """执行 SQL 审核。
 
         根据 SQL 语句类型，匹配对应的审核规则进行检查。
@@ -1641,6 +1644,7 @@ class SQLAuditEngineV2:
         Args:
             sql: 待审核的 SQL 语句
             db_type: 目标数据库类型 (mysql/postgres/redis)
+            instance_id: 目标实例 ID（用于 EXPLAIN 预检、上下文感知规则等）
 
         Returns:
             AuditReportV2 审核报告
@@ -1649,14 +1653,24 @@ class SQLAuditEngineV2:
         sql_upper = sql_clean.upper()
 
         report = AuditReportV2(sql=sql_clean, db_type=db_type)
+        report.extra_info["instance_id"] = instance_id
 
         # 加载规则
         rules = await self._load_rules(db_type)
 
+        # 构建上下文（用于上下文感知规则）
+        context: Dict[str, Any] = {"instance_id": instance_id, "db_session": self.db_session}
+
         # 执行每条规则的检查
         for rule, check_func in rules:
             try:
-                check_func(sql_clean, sql_upper, report, rule)
+                check_func(sql_clean, sql_upper, report, rule, context=context)
+            except TypeError:
+                # 兼容旧签名 (sql, sql_upper, report, rule)
+                try:
+                    check_func(sql_clean, sql_upper, report, rule)
+                except Exception:
+                    continue
             except Exception:
                 # 规则检查失败不影响整体审核
                 continue

backend/app/services/notification_sender.py

@@ -15,6 +15,37 @@ from urllib.parse import quote
 class NotificationSender:
     """通知发送器，支持钉钉、飞书、邮件。"""
 
+    # 敏感字段关键词（用于通知脱敏）
+    _SENSITIVE_PATTERNS = [
+        (r"password\s*=\s*'[^']*'", "password='***'"),
+        (r"password\s*=\s*\"[^\"]*\"", 'password="***"'),
+        (r"secret\s*=\s*'[^']*'", "secret='***'"),
+        (r"token\s*=\s*'[^']*'", "token='***'"),
+        (r"DROP\s+TABLE\s+\w+", "DROP TABLE ***"),
+        (r"TRUNCATE\s+TABLE?\s*\w+", "TRUNCATE ***"),
+        (r"FLUSHALL", "FLUSHALL"),
+        (r"FLUSHDB", "FLUSHDB"),
+    ]
+
+    @staticmethod
+    def _mask_sensitive_data(data: Dict[str, Any]) -> Dict[str, Any]:
+        """对通知数据中的敏感字段进行脱敏。"""
+        import re
+        masked = dict(data)
+        # sql_preview 截断到前100字符 + 脱敏
+        if "sql_preview" in masked and masked["sql_preview"]:
+            preview = str(masked["sql_preview"])[:100]
+            for pattern, replacement in NotificationSender._SENSITIVE_PATTERNS:
+                preview = re.sub(pattern, replacement, preview, flags=re.IGNORECASE)
+            masked["sql_preview"] = preview + ("..." if len(str(data.get("sql_preview", ""))) > 100 else "")
+        # error 字段脱敏
+        if "error" in masked and masked["error"]:
+            err = str(masked["error"])[:200]
+            for pattern, replacement in NotificationSender._SENSITIVE_PATTERNS:
+                err = re.sub(pattern, replacement, err, flags=re.IGNORECASE)
+            masked["error"] = err
+        return masked
+
     # 内置消息模板
     TEMPLATES = {
         "ticket_created": {
@@ -91,6 +122,9 @@ class NotificationSender:
             event_type: 事件类型
             data: 模板数据
         """
+        # 通知脱敏：隐藏 SQL 中的敏感内容
+        data = self._mask_sensitive_data(data)
+
         try:
             if channel_type == "dingtalk":
                 return await self._send_dingtalk(config, event_type, data)

backend/app/services/risk_evaluator.py

@@ -0,0 +1,189 @@
+"""工单风险等级自动评估。
+
+根据 SQL 类型 + 操作对象 + 审核结果，自动计算 risk_level:
+  - low:      SELECT / 简单 DML (有 WHERE + LIMIT)
+  - medium:   普通 DML / 低风险 DDL (CREATE TABLE)
+  - high:     大表 ALTER / 无 WHERE 的 UPDATE/DELETE / 多表 JOIN
+  - critical: DROP TABLE / TRUNCATE / FLUSHDB / FLUSHALL / dropDatabase
+
+评估时机：工单创建时自动计算，写入 ticket.risk_level。
+"""
+
+import re
+from typing import Optional
+
+
+def evaluate_risk_level(
+    sql_content: str,
+    db_type: str = "mysql",
+    sql_type: str = "",
+    audit_findings: Optional[list] = None,
+    statement_count: int = 1,
+) -> str:
+    """评估 SQL 的风险等级。
+
+    Args:
+        sql_content: SQL 文本（可能包含多条语句）
+        db_type: 数据库类型 mysql/postgres/redis/mongodb
+        sql_type: 前端传入的 SQL 类型标注 DDL/DML/DQL 等
+        audit_findings: 审核引擎返回的 findings 列表
+        statement_count: SQL 语句条数
+
+    Returns:
+        risk_level: low / medium / high / critical
+    """
+    sql_upper = sql_content.strip().upper()
+
+    # ── Redis 特殊处理 ──
+    if db_type == "redis":
+        return _evaluate_redis_risk(sql_upper)
+
+    # ── MongoDB 特殊处理 ──
+    if db_type == "mongodb":
+        return _evaluate_mongo_risk(sql_upper)
+
+    # ── MySQL / PostgreSQL ──
+
+    # 1. critical 级别 — 不可逆危险操作
+    critical_patterns = [
+        r"\bDROP\s+TABLE\b",
+        r"\bDROP\s+DATABASE\b",
+        r"\bDROP\s+SCHEMA\b",
+        r"\bTRUNCATE\s",
+    ]
+    for pattern in critical_patterns:
+        if re.search(pattern, sql_upper):
+            return "critical"
+
+    # 2. high 级别 — 高风险操作
+    high_indicators = 0
+
+    # ALTER 大操作（但不包括 ADD INDEX 这类较小操作）
+    if re.search(r"\bALTER\s+TABLE\b", sql_upper):
+        alter_high = [
+            r"\bDROP\s+COLUMN\b",
+            r"\bMODIFY\s+COLUMN\b",
+            r"\bCHANGE\s+COLUMN\b",
+            r"\bDROP\s+INDEX\b",
+            r"\bDROP\s+PRIMARY\s+KEY\b",
+            r"\bCONVERT\s+TO\s+CHARACTER\s+SET\b",
+            r"\bRENAME\s+(TO|AS)\b",
+        ]
+        for p in alter_high:
+            if re.search(p, sql_upper):
+                high_indicators += 1
+                break
+
+    # 无 WHERE 的 UPDATE / DELETE
+    if re.search(r"\bUPDATE\s", sql_upper) and not re.search(r"\bWHERE\b", sql_upper):
+        high_indicators += 1
+    if re.search(r"\bDELETE\s+FROM\b", sql_upper) and not re.search(r"\bWHERE\b", sql_upper):
+        high_indicators += 1
+
+    # 大量语句（>5条）
+    if statement_count > 5:
+        high_indicators += 1
+
+    # 审核结果有 ERROR 级别
+    if audit_findings:
+        errors = [f for f in audit_findings if f.get("level") == "error"]
+        if len(errors) >= 2:
+            high_indicators += 1
+
+    if high_indicators > 0:
+        return "high"
+
+    # 3. medium 级别 — 常规变更
+    medium_types = {"DDL", "DML", "SET", "HSET", "HMSET"}
+    if sql_type in medium_types:
+        return "medium"
+
+    # 有 WHERE 但没有 LIMIT 的 DELETE
+    if re.search(r"\bDELETE\s+FROM\b", sql_upper):
+        if not re.search(r"\bLIMIT\b", sql_upper):
+            return "medium"
+
+    # 任何 DDL
+    ddl_keywords = ["CREATE ", "ALTER ", "RENAME ", "GRANT ", "REVOKE ", "CREATE INDEX", "CREATE UNIQUE"]
+    for kw in ddl_keywords:
+        if kw in sql_upper:
+            return "medium"
+
+    # 4. low 级别 — 只读 / 安全操作
+    return "low"
+
+
+def _evaluate_redis_risk(sql_upper: str) -> str:
+    """Redis 命令风险评估。"""
+    critical_cmds = ["FLUSHDB", "FLUSHALL"]
+    for cmd in critical_cmds:
+        if sql_upper.startswith(cmd):
+            return "critical"
+
+    # 危险写操作
+    high_cmds = ["DEL ", "UNLINK ", "RENAME ", "FLUSHDB", "FLUSHALL"]
+    for cmd in high_cmds:
+        if sql_upper.startswith(cmd):
+            return "high"
+
+    # 一般写操作
+    write_cmds = ["SET ", "HSET ", "HMSET ", "LPUSH ", "RPUSH ", "SADD ", "ZADD ",
+                  "INCR", "DECR", "EXPIRE ", "PEXPIRE "]
+    for cmd in write_cmds:
+        if sql_upper.startswith(cmd):
+            return "medium"
+
+    # 只读命令
+    return "low"
+
+
+def _evaluate_mongo_risk(sql_upper: str) -> str:
+    """MongoDB 操作风险评估。"""
+    sql_lower = sql_upper.lower()
+    critical_ops = ["dropdatabase", "drop database"]
+    for op in critical_ops:
+        if op in sql_lower:
+            return "critical"
+
+    high_ops = ["drop(", "dropcollection", "remove(", "deletemany"]
+    for op in high_ops:
+        if op in sql_lower:
+            return "high"
+
+    write_ops = ["insertone", "insertmany", "updateone", "updatemany", "deleteone",
+                 "createindex", "create_collection"]
+    for op in write_ops:
+        if op in sql_lower:
+            return "medium"
+
+    return "low"
+
+
+# ── 风险等级配置（用于前端展示 / 审批流匹配）──
+
+RISK_LEVEL_CONFIG = {
+    "low": {
+        "label": "低风险",
+        "color": "#52c41a",
+        "description": "只读查询 / 安全操作",
+        "min_approvers": 1,
+    },
+    "medium": {
+        "label": "中风险",
+        "color": "#faad14",
+        "description": "常规数据变更 / DDL 操作",
+        "min_approvers": 1,
+    },
+    "high": {
+        "label": "高风险",
+        "color": "#fa8c16",
+        "description": "无 WHERE 删除/更新 / 大表 ALTER / 批量操作",
+        "min_approvers": 2,
+    },
+    "critical": {
+        "label": "极高风险",
+        "color": "#f5222d",
+        "description": "DROP TABLE / TRUNCATE / FLUSHDB 等不可逆操作",
+        "min_approvers": 2,
+    },
+}