feat: Add Clickzetta Lakehouse vector database integration (#22551)

Co-authored-by: Claude <noreply@anthropic.com>

api/extensions/ext_storage.py

@@ -69,6 +69,19 @@ class Storage:
                 from extensions.storage.supabase_storage import SupabaseStorage
 
                 return SupabaseStorage
+            case StorageType.CLICKZETTA_VOLUME:
+                from extensions.storage.clickzetta_volume.clickzetta_volume_storage import (
+                    ClickZettaVolumeConfig,
+                    ClickZettaVolumeStorage,
+                )
+
+                def create_clickzetta_volume_storage():
+                    # ClickZettaVolumeConfig will automatically read from environment variables
+                    # and fallback to CLICKZETTA_* config if CLICKZETTA_VOLUME_* is not set
+                    volume_config = ClickZettaVolumeConfig()
+                    return ClickZettaVolumeStorage(volume_config)
+
+                return create_clickzetta_volume_storage
             case _:
                 raise ValueError(f"unsupported storage type {storage_type}")
 

api/extensions/storage/clickzetta_volume/__init__.py

@@ -0,0 +1,5 @@
+"""ClickZetta Volume storage implementation."""
+
+from .clickzetta_volume_storage import ClickZettaVolumeStorage
+
+__all__ = ["ClickZettaVolumeStorage"]

api/extensions/storage/clickzetta_volume/clickzetta_volume_storage.py

@@ -0,0 +1,530 @@
+"""ClickZetta Volume Storage Implementation
+
+This module provides storage backend using ClickZetta Volume functionality.
+Supports Table Volume, User Volume, and External Volume types.
+"""
+
+import logging
+import os
+import tempfile
+from collections.abc import Generator
+from io import BytesIO
+from pathlib import Path
+from typing import Optional
+
+import clickzetta  # type: ignore[import]
+from pydantic import BaseModel, model_validator
+
+from extensions.storage.base_storage import BaseStorage
+
+from .volume_permissions import VolumePermissionManager, check_volume_permission
+
+logger = logging.getLogger(__name__)
+
+
+class ClickZettaVolumeConfig(BaseModel):
+    """Configuration for ClickZetta Volume storage."""
+
+    username: str = ""
+    password: str = ""
+    instance: str = ""
+    service: str = "api.clickzetta.com"
+    workspace: str = "quick_start"
+    vcluster: str = "default_ap"
+    schema_name: str = "dify"
+    volume_type: str = "table"  # table|user|external
+    volume_name: Optional[str] = None  # For external volumes
+    table_prefix: str = "dataset_"  # Prefix for table volume names
+    dify_prefix: str = "dify_km"  # Directory prefix for User Volume
+    permission_check: bool = True  # Enable/disable permission checking
+
+    @model_validator(mode="before")
+    @classmethod
+    def validate_config(cls, values: dict) -> dict:
+        """Validate the configuration values.
+
+        This method will first try to use CLICKZETTA_VOLUME_* environment variables,
+        then fall back to CLICKZETTA_* environment variables (for vector DB config).
+        """
+        import os
+
+        # Helper function to get environment variable with fallback
+        def get_env_with_fallback(volume_key: str, fallback_key: str, default: str | None = None) -> str:
+            # First try CLICKZETTA_VOLUME_* specific config
+            volume_value = values.get(volume_key.lower().replace("clickzetta_volume_", ""))
+            if volume_value:
+                return str(volume_value)
+
+            # Then try environment variables
+            volume_env = os.getenv(volume_key)
+            if volume_env:
+                return volume_env
+
+            # Fall back to existing CLICKZETTA_* config
+            fallback_env = os.getenv(fallback_key)
+            if fallback_env:
+                return fallback_env
+
+            return default or ""
+
+        # Apply environment variables with fallback to existing CLICKZETTA_* config
+        values.setdefault("username", get_env_with_fallback("CLICKZETTA_VOLUME_USERNAME", "CLICKZETTA_USERNAME"))
+        values.setdefault("password", get_env_with_fallback("CLICKZETTA_VOLUME_PASSWORD", "CLICKZETTA_PASSWORD"))
+        values.setdefault("instance", get_env_with_fallback("CLICKZETTA_VOLUME_INSTANCE", "CLICKZETTA_INSTANCE"))
+        values.setdefault(
+            "service", get_env_with_fallback("CLICKZETTA_VOLUME_SERVICE", "CLICKZETTA_SERVICE", "api.clickzetta.com")
+        )
+        values.setdefault(
+            "workspace", get_env_with_fallback("CLICKZETTA_VOLUME_WORKSPACE", "CLICKZETTA_WORKSPACE", "quick_start")
+        )
+        values.setdefault(
+            "vcluster", get_env_with_fallback("CLICKZETTA_VOLUME_VCLUSTER", "CLICKZETTA_VCLUSTER", "default_ap")
+        )
+        values.setdefault("schema_name", get_env_with_fallback("CLICKZETTA_VOLUME_SCHEMA", "CLICKZETTA_SCHEMA", "dify"))
+
+        # Volume-specific configurations (no fallback to vector DB config)
+        values.setdefault("volume_type", os.getenv("CLICKZETTA_VOLUME_TYPE", "table"))
+        values.setdefault("volume_name", os.getenv("CLICKZETTA_VOLUME_NAME"))
+        values.setdefault("table_prefix", os.getenv("CLICKZETTA_VOLUME_TABLE_PREFIX", "dataset_"))
+        values.setdefault("dify_prefix", os.getenv("CLICKZETTA_VOLUME_DIFY_PREFIX", "dify_km"))
+        # 暂时禁用权限检查功能，直接设置为false
+        values.setdefault("permission_check", False)
+
+        # Validate required fields
+        if not values.get("username"):
+            raise ValueError("CLICKZETTA_VOLUME_USERNAME or CLICKZETTA_USERNAME is required")
+        if not values.get("password"):
+            raise ValueError("CLICKZETTA_VOLUME_PASSWORD or CLICKZETTA_PASSWORD is required")
+        if not values.get("instance"):
+            raise ValueError("CLICKZETTA_VOLUME_INSTANCE or CLICKZETTA_INSTANCE is required")
+
+        # Validate volume type
+        volume_type = values["volume_type"]
+        if volume_type not in ["table", "user", "external"]:
+            raise ValueError("CLICKZETTA_VOLUME_TYPE must be one of: table, user, external")
+
+        if volume_type == "external" and not values.get("volume_name"):
+            raise ValueError("CLICKZETTA_VOLUME_NAME is required for external volume type")
+
+        return values
+
+
+class ClickZettaVolumeStorage(BaseStorage):
+    """ClickZetta Volume storage implementation."""
+
+    def __init__(self, config: ClickZettaVolumeConfig):
+        """Initialize ClickZetta Volume storage.
+
+        Args:
+            config: ClickZetta Volume configuration
+        """
+        self._config = config
+        self._connection = None
+        self._permission_manager: VolumePermissionManager | None = None
+        self._init_connection()
+        self._init_permission_manager()
+
+        logger.info("ClickZetta Volume storage initialized with type: %s", config.volume_type)
+
+    def _init_connection(self):
+        """Initialize ClickZetta connection."""
+        try:
+            self._connection = clickzetta.connect(
+                username=self._config.username,
+                password=self._config.password,
+                instance=self._config.instance,
+                service=self._config.service,
+                workspace=self._config.workspace,
+                vcluster=self._config.vcluster,
+                schema=self._config.schema_name,
+            )
+            logger.debug("ClickZetta connection established")
+        except Exception as e:
+            logger.exception("Failed to connect to ClickZetta")
+            raise
+
+    def _init_permission_manager(self):
+        """Initialize permission manager."""
+        try:
+            self._permission_manager = VolumePermissionManager(
+                self._connection, self._config.volume_type, self._config.volume_name
+            )
+            logger.debug("Permission manager initialized")
+        except Exception as e:
+            logger.exception("Failed to initialize permission manager")
+            raise
+
+    def _get_volume_path(self, filename: str, dataset_id: Optional[str] = None) -> str:
+        """Get the appropriate volume path based on volume type."""
+        if self._config.volume_type == "user":
+            # Add dify prefix for User Volume to organize files
+            return f"{self._config.dify_prefix}/{filename}"
+        elif self._config.volume_type == "table":
+            # Check if this should use User Volume (special directories)
+            if dataset_id in ["upload_files", "temp", "cache", "tools", "website_files", "privkeys"]:
+                # Use User Volume with dify prefix for special directories
+                return f"{self._config.dify_prefix}/{filename}"
+
+            if dataset_id:
+                return f"{self._config.table_prefix}{dataset_id}/{filename}"
+            else:
+                # Extract dataset_id from filename if not provided
+                # Format: dataset_id/filename
+                if "/" in filename:
+                    return filename
+                else:
+                    raise ValueError("dataset_id is required for table volume or filename must include dataset_id/")
+        elif self._config.volume_type == "external":
+            return filename
+        else:
+            raise ValueError(f"Unsupported volume type: {self._config.volume_type}")
+
+    def _get_volume_sql_prefix(self, dataset_id: Optional[str] = None) -> str:
+        """Get SQL prefix for volume operations."""
+        if self._config.volume_type == "user":
+            return "USER VOLUME"
+        elif self._config.volume_type == "table":
+            # For Dify's current file storage pattern, most files are stored in
+            # paths like "upload_files/tenant_id/uuid.ext", "tools/tenant_id/uuid.ext"
+            # These should use USER VOLUME for better compatibility
+            if dataset_id in ["upload_files", "temp", "cache", "tools", "website_files", "privkeys"]:
+                return "USER VOLUME"
+
+            # Only use TABLE VOLUME for actual dataset-specific paths
+            # like "dataset_12345/file.pdf" or paths with dataset_ prefix
+            if dataset_id:
+                table_name = f"{self._config.table_prefix}{dataset_id}"
+            else:
+                # Default table name for generic operations
+                table_name = "default_dataset"
+            return f"TABLE VOLUME {table_name}"
+        elif self._config.volume_type == "external":
+            return f"VOLUME {self._config.volume_name}"
+        else:
+            raise ValueError(f"Unsupported volume type: {self._config.volume_type}")
+
+    def _execute_sql(self, sql: str, fetch: bool = False):
+        """Execute SQL command."""
+        try:
+            if self._connection is None:
+                raise RuntimeError("Connection not initialized")
+            with self._connection.cursor() as cursor:
+                cursor.execute(sql)
+                if fetch:
+                    return cursor.fetchall()
+                return None
+        except Exception as e:
+            logger.exception("SQL execution failed: %s", sql)
+            raise
+
+    def _ensure_table_volume_exists(self, dataset_id: str) -> None:
+        """Ensure table volume exists for the given dataset_id."""
+        if self._config.volume_type != "table" or not dataset_id:
+            return
+
+        # Skip for upload_files and other special directories that use USER VOLUME
+        if dataset_id in ["upload_files", "temp", "cache", "tools", "website_files", "privkeys"]:
+            return
+
+        table_name = f"{self._config.table_prefix}{dataset_id}"
+
+        try:
+            # Check if table exists
+            check_sql = f"SHOW TABLES LIKE '{table_name}'"
+            result = self._execute_sql(check_sql, fetch=True)
+
+            if not result:
+                # Create table with volume
+                create_sql = f"""
+                CREATE TABLE {table_name} (
+                    id INT PRIMARY KEY AUTO_INCREMENT,
+                    filename VARCHAR(255) NOT NULL,
+                    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+                    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+                    INDEX idx_filename (filename)
+                ) WITH VOLUME
+                """
+                self._execute_sql(create_sql)
+                logger.info("Created table volume: %s", table_name)
+
+        except Exception as e:
+            logger.warning("Failed to create table volume %s: %s", table_name, e)
+            # Don't raise exception, let the operation continue
+            # The table might exist but not be visible due to permissions
+
+    def save(self, filename: str, data: bytes) -> None:
+        """Save data to ClickZetta Volume.
+
+        Args:
+            filename: File path in volume
+            data: File content as bytes
+        """
+        # Extract dataset_id from filename if present
+        dataset_id = None
+        if "/" in filename and self._config.volume_type == "table":
+            parts = filename.split("/", 1)
+            if parts[0].startswith(self._config.table_prefix):
+                dataset_id = parts[0][len(self._config.table_prefix) :]
+                filename = parts[1]
+            else:
+                dataset_id = parts[0]
+                filename = parts[1]
+
+        # Ensure table volume exists (for table volumes)
+        if dataset_id:
+            self._ensure_table_volume_exists(dataset_id)
+
+        # Check permissions (if enabled)
+        if self._config.permission_check:
+            # Skip permission check for special directories that use USER VOLUME
+            if dataset_id not in ["upload_files", "temp", "cache", "tools", "website_files", "privkeys"]:
+                if self._permission_manager is not None:
+                    check_volume_permission(self._permission_manager, "save", dataset_id)
+
+        # Write data to temporary file
+        with tempfile.NamedTemporaryFile(delete=False) as temp_file:
+            temp_file.write(data)
+            temp_file_path = temp_file.name
+
+        try:
+            # Upload to volume
+            volume_prefix = self._get_volume_sql_prefix(dataset_id)
+
+            # Get the actual volume path (may include dify_km prefix)
+            volume_path = self._get_volume_path(filename, dataset_id)
+            actual_filename = volume_path.split("/")[-1] if "/" in volume_path else volume_path
+
+            # For User Volume, use the full path with dify_km prefix
+            if volume_prefix == "USER VOLUME":
+                sql = f"PUT '{temp_file_path}' TO {volume_prefix} FILE '{volume_path}'"
+            else:
+                sql = f"PUT '{temp_file_path}' TO {volume_prefix} FILE '{filename}'"
+
+            self._execute_sql(sql)
+            logger.debug("File %s saved to ClickZetta Volume at path %s", filename, volume_path)
+        finally:
+            # Clean up temporary file
+            Path(temp_file_path).unlink(missing_ok=True)
+
+    def load_once(self, filename: str) -> bytes:
+        """Load file content from ClickZetta Volume.
+
+        Args:
+            filename: File path in volume
+
+        Returns:
+            File content as bytes
+        """
+        # Extract dataset_id from filename if present
+        dataset_id = None
+        if "/" in filename and self._config.volume_type == "table":
+            parts = filename.split("/", 1)
+            if parts[0].startswith(self._config.table_prefix):
+                dataset_id = parts[0][len(self._config.table_prefix) :]
+                filename = parts[1]
+            else:
+                dataset_id = parts[0]
+                filename = parts[1]
+
+        # Check permissions (if enabled)
+        if self._config.permission_check:
+            # Skip permission check for special directories that use USER VOLUME
+            if dataset_id not in ["upload_files", "temp", "cache", "tools", "website_files", "privkeys"]:
+                if self._permission_manager is not None:
+                    check_volume_permission(self._permission_manager, "load_once", dataset_id)
+
+        # Download to temporary directory
+        with tempfile.TemporaryDirectory() as temp_dir:
+            volume_prefix = self._get_volume_sql_prefix(dataset_id)
+
+            # Get the actual volume path (may include dify_km prefix)
+            volume_path = self._get_volume_path(filename, dataset_id)
+
+            # For User Volume, use the full path with dify_km prefix
+            if volume_prefix == "USER VOLUME":
+                sql = f"GET {volume_prefix} FILE '{volume_path}' TO '{temp_dir}'"
+            else:
+                sql = f"GET {volume_prefix} FILE '{filename}' TO '{temp_dir}'"
+
+            self._execute_sql(sql)
+
+            # Find the downloaded file (may be in subdirectories)
+            downloaded_file = None
+            for root, dirs, files in os.walk(temp_dir):
+                for file in files:
+                    if file == filename or file == os.path.basename(filename):
+                        downloaded_file = Path(root) / file
+                        break
+                if downloaded_file:
+                    break
+
+            if not downloaded_file or not downloaded_file.exists():
+                raise FileNotFoundError(f"Downloaded file not found: {filename}")
+
+            content = downloaded_file.read_bytes()
+
+            logger.debug("File %s loaded from ClickZetta Volume", filename)
+            return content
+
+    def load_stream(self, filename: str) -> Generator:
+        """Load file as stream from ClickZetta Volume.
+
+        Args:
+            filename: File path in volume
+
+        Yields:
+            File content chunks
+        """
+        content = self.load_once(filename)
+        batch_size = 4096
+        stream = BytesIO(content)
+
+        while chunk := stream.read(batch_size):
+            yield chunk
+
+        logger.debug("File %s loaded as stream from ClickZetta Volume", filename)
+
+    def download(self, filename: str, target_filepath: str):
+        """Download file from ClickZetta Volume to local path.
+
+        Args:
+            filename: File path in volume
+            target_filepath: Local target file path
+        """
+        content = self.load_once(filename)
+
+        with Path(target_filepath).open("wb") as f:
+            f.write(content)
+
+        logger.debug("File %s downloaded from ClickZetta Volume to %s", filename, target_filepath)
+
+    def exists(self, filename: str) -> bool:
+        """Check if file exists in ClickZetta Volume.
+
+        Args:
+            filename: File path in volume
+
+        Returns:
+            True if file exists, False otherwise
+        """
+        try:
+            # Extract dataset_id from filename if present
+            dataset_id = None
+            if "/" in filename and self._config.volume_type == "table":
+                parts = filename.split("/", 1)
+                if parts[0].startswith(self._config.table_prefix):
+                    dataset_id = parts[0][len(self._config.table_prefix) :]
+                    filename = parts[1]
+                else:
+                    dataset_id = parts[0]
+                    filename = parts[1]
+
+            volume_prefix = self._get_volume_sql_prefix(dataset_id)
+
+            # Get the actual volume path (may include dify_km prefix)
+            volume_path = self._get_volume_path(filename, dataset_id)
+
+            # For User Volume, use the full path with dify_km prefix
+            if volume_prefix == "USER VOLUME":
+                sql = f"LIST {volume_prefix} REGEXP = '^{volume_path}$'"
+            else:
+                sql = f"LIST {volume_prefix} REGEXP = '^{filename}$'"
+
+            rows = self._execute_sql(sql, fetch=True)
+
+            exists = len(rows) > 0
+            logger.debug("File %s exists check: %s", filename, exists)
+            return exists
+        except Exception as e:
+            logger.warning("Error checking file existence for %s: %s", filename, e)
+            return False
+
+    def delete(self, filename: str):
+        """Delete file from ClickZetta Volume.
+
+        Args:
+            filename: File path in volume
+        """
+        if not self.exists(filename):
+            logger.debug("File %s not found, skip delete", filename)
+            return
+
+        # Extract dataset_id from filename if present
+        dataset_id = None
+        if "/" in filename and self._config.volume_type == "table":
+            parts = filename.split("/", 1)
+            if parts[0].startswith(self._config.table_prefix):
+                dataset_id = parts[0][len(self._config.table_prefix) :]
+                filename = parts[1]
+            else:
+                dataset_id = parts[0]
+                filename = parts[1]
+
+        volume_prefix = self._get_volume_sql_prefix(dataset_id)
+
+        # Get the actual volume path (may include dify_km prefix)
+        volume_path = self._get_volume_path(filename, dataset_id)
+
+        # For User Volume, use the full path with dify_km prefix
+        if volume_prefix == "USER VOLUME":
+            sql = f"REMOVE {volume_prefix} FILE '{volume_path}'"
+        else:
+            sql = f"REMOVE {volume_prefix} FILE '{filename}'"
+
+        self._execute_sql(sql)
+
+        logger.debug("File %s deleted from ClickZetta Volume", filename)
+
+    def scan(self, path: str, files: bool = True, directories: bool = False) -> list[str]:
+        """Scan files and directories in ClickZetta Volume.
+
+        Args:
+            path: Path to scan (dataset_id for table volumes)
+            files: Include files in results
+            directories: Include directories in results
+
+        Returns:
+            List of file/directory paths
+        """
+        try:
+            # For table volumes, path is treated as dataset_id
+            dataset_id = None
+            if self._config.volume_type == "table":
+                dataset_id = path
+                path = ""  # Root of the table volume
+
+            volume_prefix = self._get_volume_sql_prefix(dataset_id)
+
+            # For User Volume, add dify prefix to path
+            if volume_prefix == "USER VOLUME":
+                if path:
+                    scan_path = f"{self._config.dify_prefix}/{path}"
+                    sql = f"LIST {volume_prefix} SUBDIRECTORY '{scan_path}'"
+                else:
+                    sql = f"LIST {volume_prefix} SUBDIRECTORY '{self._config.dify_prefix}'"
+            else:
+                if path:
+                    sql = f"LIST {volume_prefix} SUBDIRECTORY '{path}'"
+                else:
+                    sql = f"LIST {volume_prefix}"
+
+            rows = self._execute_sql(sql, fetch=True)
+
+            result = []
+            for row in rows:
+                file_path = row[0]  # relative_path column
+
+                # For User Volume, remove dify prefix from results
+                dify_prefix_with_slash = f"{self._config.dify_prefix}/"
+                if volume_prefix == "USER VOLUME" and file_path.startswith(dify_prefix_with_slash):
+                    file_path = file_path[len(dify_prefix_with_slash) :]  # Remove prefix
+
+                if files and not file_path.endswith("/") or directories and file_path.endswith("/"):
+                    result.append(file_path)
+
+            logger.debug("Scanned %d items in path %s", len(result), path)
+            return result
+
+        except Exception as e:
+            logger.exception("Error scanning path %s", path)
+            return []

api/extensions/storage/clickzetta_volume/file_lifecycle.py

@@ -0,0 +1,516 @@
+"""ClickZetta Volume文件生命周期管理
+
+该模块提供文件版本控制、自动清理、备份和恢复等生命周期管理功能。
+支持知识库文件的完整生命周期管理。
+"""
+
+import json
+import logging
+from dataclasses import asdict, dataclass
+from datetime import datetime, timedelta
+from enum import Enum
+from typing import Any, Optional
+
+logger = logging.getLogger(__name__)
+
+
+class FileStatus(Enum):
+    """文件状态枚举"""
+
+    ACTIVE = "active"  # 活跃状态
+    ARCHIVED = "archived"  # 已归档
+    DELETED = "deleted"  # 已删除（软删除）
+    BACKUP = "backup"  # 备份文件
+
+
+@dataclass
+class FileMetadata:
+    """文件元数据"""
+
+    filename: str
+    size: int | None
+    created_at: datetime
+    modified_at: datetime
+    version: int | None
+    status: FileStatus
+    checksum: Optional[str] = None
+    tags: Optional[dict[str, str]] = None
+    parent_version: Optional[int] = None
+
+    def to_dict(self) -> dict:
+        """转换为字典格式"""
+        data = asdict(self)
+        data["created_at"] = self.created_at.isoformat()
+        data["modified_at"] = self.modified_at.isoformat()
+        data["status"] = self.status.value
+        return data
+
+    @classmethod
+    def from_dict(cls, data: dict) -> "FileMetadata":
+        """从字典创建实例"""
+        data = data.copy()
+        data["created_at"] = datetime.fromisoformat(data["created_at"])
+        data["modified_at"] = datetime.fromisoformat(data["modified_at"])
+        data["status"] = FileStatus(data["status"])
+        return cls(**data)
+
+
+class FileLifecycleManager:
+    """文件生命周期管理器"""
+
+    def __init__(self, storage, dataset_id: Optional[str] = None):
+        """初始化生命周期管理器
+
+        Args:
+            storage: ClickZetta Volume存储实例
+            dataset_id: 数据集ID（用于Table Volume）
+        """
+        self._storage = storage
+        self._dataset_id = dataset_id
+        self._metadata_file = ".dify_file_metadata.json"
+        self._version_prefix = ".versions/"
+        self._backup_prefix = ".backups/"
+        self._deleted_prefix = ".deleted/"
+
+        # 获取权限管理器（如果存在）
+        self._permission_manager: Optional[Any] = getattr(storage, "_permission_manager", None)
+
+    def save_with_lifecycle(self, filename: str, data: bytes, tags: Optional[dict[str, str]] = None) -> FileMetadata:
+        """保存文件并管理生命周期
+
+        Args:
+            filename: 文件名
+            data: 文件内容
+            tags: 文件标签
+
+        Returns:
+            文件元数据
+        """
+        # 权限检查
+        if not self._check_permission(filename, "save"):
+            from .volume_permissions import VolumePermissionError
+
+            raise VolumePermissionError(
+                f"Permission denied for lifecycle save operation on file: {filename}",
+                operation="save",
+                volume_type=getattr(self._storage, "_config", {}).get("volume_type", "unknown"),
+                dataset_id=self._dataset_id,
+            )
+
+        try:
+            # 1. 检查是否存在旧版本
+            metadata_dict = self._load_metadata()
+            current_metadata = metadata_dict.get(filename)
+
+            # 2. 如果存在旧版本，创建版本备份
+            if current_metadata:
+                self._create_version_backup(filename, current_metadata)
+
+            # 3. 计算文件信息
+            now = datetime.now()
+            checksum = self._calculate_checksum(data)
+            new_version = (current_metadata["version"] + 1) if current_metadata else 1
+
+            # 4. 保存新文件
+            self._storage.save(filename, data)
+
+            # 5. 创建元数据
+            created_at = now
+            parent_version = None
+
+            if current_metadata:
+                # 如果created_at是字符串，转换为datetime
+                if isinstance(current_metadata["created_at"], str):
+                    created_at = datetime.fromisoformat(current_metadata["created_at"])
+                else:
+                    created_at = current_metadata["created_at"]
+                parent_version = current_metadata["version"]
+
+            file_metadata = FileMetadata(
+                filename=filename,
+                size=len(data),
+                created_at=created_at,
+                modified_at=now,
+                version=new_version,
+                status=FileStatus.ACTIVE,
+                checksum=checksum,
+                tags=tags or {},
+                parent_version=parent_version,
+            )
+
+            # 6. 更新元数据
+            metadata_dict[filename] = file_metadata.to_dict()
+            self._save_metadata(metadata_dict)
+
+            logger.info("File %s saved with lifecycle management, version %s", filename, new_version)
+            return file_metadata
+
+        except Exception as e:
+            logger.exception("Failed to save file with lifecycle")
+            raise
+
+    def get_file_metadata(self, filename: str) -> Optional[FileMetadata]:
+        """获取文件元数据
+
+        Args:
+            filename: 文件名
+
+        Returns:
+            文件元数据，如果不存在返回None
+        """
+        try:
+            metadata_dict = self._load_metadata()
+            if filename in metadata_dict:
+                return FileMetadata.from_dict(metadata_dict[filename])
+            return None
+        except Exception as e:
+            logger.exception("Failed to get file metadata for %s", filename)
+            return None
+
+    def list_file_versions(self, filename: str) -> list[FileMetadata]:
+        """列出文件的所有版本
+
+        Args:
+            filename: 文件名
+
+        Returns:
+            文件版本列表，按版本号排序
+        """
+        try:
+            versions = []
+
+            # 获取当前版本
+            current_metadata = self.get_file_metadata(filename)
+            if current_metadata:
+                versions.append(current_metadata)
+
+            # 获取历史版本
+            version_pattern = f"{self._version_prefix}{filename}.v*"
+            try:
+                version_files = self._storage.scan(self._dataset_id or "", files=True)
+                for file_path in version_files:
+                    if file_path.startswith(f"{self._version_prefix}{filename}.v"):
+                        # 解析版本号
+                        version_str = file_path.split(".v")[-1].split(".")[0]
+                        try:
+                            version_num = int(version_str)
+                            # 这里简化处理，实际应该从版本文件中读取元数据
+                            # 暂时创建基本的元数据信息
+                        except ValueError:
+                            continue
+            except:
+                # 如果无法扫描版本文件，只返回当前版本
+                pass
+
+            return sorted(versions, key=lambda x: x.version or 0, reverse=True)
+
+        except Exception as e:
+            logger.exception("Failed to list file versions for %s", filename)
+            return []
+
+    def restore_version(self, filename: str, version: int) -> bool:
+        """恢复文件到指定版本
+
+        Args:
+            filename: 文件名
+            version: 要恢复的版本号
+
+        Returns:
+            恢复是否成功
+        """
+        try:
+            version_filename = f"{self._version_prefix}{filename}.v{version}"
+
+            # 检查版本文件是否存在
+            if not self._storage.exists(version_filename):
+                logger.warning("Version %s of %s not found", version, filename)
+                return False
+
+            # 读取版本文件内容
+            version_data = self._storage.load_once(version_filename)
+
+            # 保存当前版本为备份
+            current_metadata = self.get_file_metadata(filename)
+            if current_metadata:
+                self._create_version_backup(filename, current_metadata.to_dict())
+
+            # 恢复文件
+            self.save_with_lifecycle(filename, version_data, {"restored_from": str(version)})
+            return True
+
+        except Exception as e:
+            logger.exception("Failed to restore %s to version %s", filename, version)
+            return False
+
+    def archive_file(self, filename: str) -> bool:
+        """归档文件
+
+        Args:
+            filename: 文件名
+
+        Returns:
+            归档是否成功
+        """
+        # 权限检查
+        if not self._check_permission(filename, "archive"):
+            logger.warning("Permission denied for archive operation on file: %s", filename)
+            return False
+
+        try:
+            # 更新文件状态为归档
+            metadata_dict = self._load_metadata()
+            if filename not in metadata_dict:
+                logger.warning("File %s not found in metadata", filename)
+                return False
+
+            metadata_dict[filename]["status"] = FileStatus.ARCHIVED.value
+            metadata_dict[filename]["modified_at"] = datetime.now().isoformat()
+
+            self._save_metadata(metadata_dict)
+
+            logger.info("File %s archived successfully", filename)
+            return True
+
+        except Exception as e:
+            logger.exception("Failed to archive file %s", filename)
+            return False
+
+    def soft_delete_file(self, filename: str) -> bool:
+        """软删除文件（移动到删除目录）
+
+        Args:
+            filename: 文件名
+
+        Returns:
+            删除是否成功
+        """
+        # 权限检查
+        if not self._check_permission(filename, "delete"):
+            logger.warning("Permission denied for soft delete operation on file: %s", filename)
+            return False
+
+        try:
+            # 检查文件是否存在
+            if not self._storage.exists(filename):
+                logger.warning("File %s not found", filename)
+                return False
+
+            # 读取文件内容
+            file_data = self._storage.load_once(filename)
+
+            # 移动到删除目录
+            deleted_filename = f"{self._deleted_prefix}{filename}.{datetime.now().strftime('%Y%m%d_%H%M%S')}"
+            self._storage.save(deleted_filename, file_data)
+
+            # 删除原文件
+            self._storage.delete(filename)
+
+            # 更新元数据
+            metadata_dict = self._load_metadata()
+            if filename in metadata_dict:
+                metadata_dict[filename]["status"] = FileStatus.DELETED.value
+                metadata_dict[filename]["modified_at"] = datetime.now().isoformat()
+                self._save_metadata(metadata_dict)
+
+            logger.info("File %s soft deleted successfully", filename)
+            return True
+
+        except Exception as e:
+            logger.exception("Failed to soft delete file %s", filename)
+            return False
+
+    def cleanup_old_versions(self, max_versions: int = 5, max_age_days: int = 30) -> int:
+        """清理旧版本文件
+
+        Args:
+            max_versions: 保留的最大版本数
+            max_age_days: 版本文件的最大保留天数
+
+        Returns:
+            清理的文件数量
+        """
+        try:
+            cleaned_count = 0
+            cutoff_date = datetime.now() - timedelta(days=max_age_days)
+
+            # 获取所有版本文件
+            try:
+                all_files = self._storage.scan(self._dataset_id or "", files=True)
+                version_files = [f for f in all_files if f.startswith(self._version_prefix)]
+
+                # 按文件分组
+                file_versions: dict[str, list[tuple[int, str]]] = {}
+                for version_file in version_files:
+                    # 解析文件名和版本
+                    parts = version_file[len(self._version_prefix) :].split(".v")
+                    if len(parts) >= 2:
+                        base_filename = parts[0]
+                        version_part = parts[1].split(".")[0]
+                        try:
+                            version_num = int(version_part)
+                            if base_filename not in file_versions:
+                                file_versions[base_filename] = []
+                            file_versions[base_filename].append((version_num, version_file))
+                        except ValueError:
+                            continue
+
+                # 清理每个文件的旧版本
+                for base_filename, versions in file_versions.items():
+                    # 按版本号排序
+                    versions.sort(key=lambda x: x[0], reverse=True)
+
+                    # 保留最新的max_versions个版本，删除其余的
+                    if len(versions) > max_versions:
+                        to_delete = versions[max_versions:]
+                        for version_num, version_file in to_delete:
+                            self._storage.delete(version_file)
+                            cleaned_count += 1
+                            logger.debug("Cleaned old version: %s", version_file)
+
+                logger.info("Cleaned %d old version files", cleaned_count)
+
+            except Exception as e:
+                logger.warning("Could not scan for version files: %s", e)
+
+            return cleaned_count
+
+        except Exception as e:
+            logger.exception("Failed to cleanup old versions")
+            return 0
+
+    def get_storage_statistics(self) -> dict[str, Any]:
+        """获取存储统计信息
+
+        Returns:
+            存储统计字典
+        """
+        try:
+            metadata_dict = self._load_metadata()
+
+            stats: dict[str, Any] = {
+                "total_files": len(metadata_dict),
+                "active_files": 0,
+                "archived_files": 0,
+                "deleted_files": 0,
+                "total_size": 0,
+                "versions_count": 0,
+                "oldest_file": None,
+                "newest_file": None,
+            }
+
+            oldest_date = None
+            newest_date = None
+
+            for filename, metadata in metadata_dict.items():
+                file_meta = FileMetadata.from_dict(metadata)
+
+                # 统计文件状态
+                if file_meta.status == FileStatus.ACTIVE:
+                    stats["active_files"] = (stats["active_files"] or 0) + 1
+                elif file_meta.status == FileStatus.ARCHIVED:
+                    stats["archived_files"] = (stats["archived_files"] or 0) + 1
+                elif file_meta.status == FileStatus.DELETED:
+                    stats["deleted_files"] = (stats["deleted_files"] or 0) + 1
+
+                # 统计大小
+                stats["total_size"] = (stats["total_size"] or 0) + (file_meta.size or 0)
+
+                # 统计版本
+                stats["versions_count"] = (stats["versions_count"] or 0) + (file_meta.version or 0)
+
+                # 找出最新和最旧的文件
+                if oldest_date is None or file_meta.created_at < oldest_date:
+                    oldest_date = file_meta.created_at
+                    stats["oldest_file"] = filename
+
+                if newest_date is None or file_meta.modified_at > newest_date:
+                    newest_date = file_meta.modified_at
+                    stats["newest_file"] = filename
+
+            return stats
+
+        except Exception as e:
+            logger.exception("Failed to get storage statistics")
+            return {}
+
+    def _create_version_backup(self, filename: str, metadata: dict):
+        """创建版本备份"""
+        try:
+            # 读取当前文件内容
+            current_data = self._storage.load_once(filename)
+
+            # 保存为版本文件
+            version_filename = f"{self._version_prefix}{filename}.v{metadata['version']}"
+            self._storage.save(version_filename, current_data)
+
+            logger.debug("Created version backup: %s", version_filename)
+
+        except Exception as e:
+            logger.warning("Failed to create version backup for %s: %s", filename, e)
+
+    def _load_metadata(self) -> dict[str, Any]:
+        """加载元数据文件"""
+        try:
+            if self._storage.exists(self._metadata_file):
+                metadata_content = self._storage.load_once(self._metadata_file)
+                result = json.loads(metadata_content.decode("utf-8"))
+                return dict(result) if result else {}
+            else:
+                return {}
+        except Exception as e:
+            logger.warning("Failed to load metadata: %s", e)
+            return {}
+
+    def _save_metadata(self, metadata_dict: dict):
+        """保存元数据文件"""
+        try:
+            metadata_content = json.dumps(metadata_dict, indent=2, ensure_ascii=False)
+            self._storage.save(self._metadata_file, metadata_content.encode("utf-8"))
+            logger.debug("Metadata saved successfully")
+        except Exception as e:
+            logger.exception("Failed to save metadata")
+            raise
+
+    def _calculate_checksum(self, data: bytes) -> str:
+        """计算文件校验和"""
+        import hashlib
+
+        return hashlib.md5(data).hexdigest()
+
+    def _check_permission(self, filename: str, operation: str) -> bool:
+        """检查文件操作权限
+
+        Args:
+            filename: 文件名
+            operation: 操作类型
+
+        Returns:
+            True if permission granted, False otherwise
+        """
+        # 如果没有权限管理器，默认允许
+        if not self._permission_manager:
+            return True
+
+        try:
+            # 根据操作类型映射到权限
+            operation_mapping = {
+                "save": "save",
+                "load": "load_once",
+                "delete": "delete",
+                "archive": "delete",  # 归档需要删除权限
+                "restore": "save",  # 恢复需要写权限
+                "cleanup": "delete",  # 清理需要删除权限
+                "read": "load_once",
+                "write": "save",
+            }
+
+            mapped_operation = operation_mapping.get(operation, operation)
+
+            # 检查权限
+            result = self._permission_manager.validate_operation(mapped_operation, self._dataset_id)
+            return bool(result)
+
+        except Exception as e:
+            logger.exception("Permission check failed for %s operation %s", filename, operation)
+            # 安全默认：权限检查失败时拒绝访问
+            return False

api/extensions/storage/clickzetta_volume/volume_permissions.py

@@ -0,0 +1,646 @@
+"""ClickZetta Volume权限管理机制
+
+该模块提供Volume权限检查、验证和管理功能。
+根据ClickZetta的权限模型，不同Volume类型有不同的权限要求。
+"""
+
+import logging
+from enum import Enum
+from typing import Optional
+
+logger = logging.getLogger(__name__)
+
+
+class VolumePermission(Enum):
+    """Volume权限类型枚举"""
+
+    READ = "SELECT"  # 对应ClickZetta的SELECT权限
+    WRITE = "INSERT,UPDATE,DELETE"  # 对应ClickZetta的写权限
+    LIST = "SELECT"  # 列出文件需要SELECT权限
+    DELETE = "INSERT,UPDATE,DELETE"  # 删除文件需要写权限
+    USAGE = "USAGE"  # External Volume需要的基本权限
+
+
+class VolumePermissionManager:
+    """Volume权限管理器"""
+
+    def __init__(self, connection_or_config, volume_type: str | None = None, volume_name: Optional[str] = None):
+        """初始化权限管理器
+
+        Args:
+            connection_or_config: ClickZetta连接对象或配置字典
+            volume_type: Volume类型 (user|table|external)
+            volume_name: Volume名称 (用于external volume)
+        """
+        # 支持两种初始化方式：连接对象或配置字典
+        if isinstance(connection_or_config, dict):
+            # 从配置字典创建连接
+            import clickzetta  # type: ignore[import-untyped]
+
+            config = connection_or_config
+            self._connection = clickzetta.connect(
+                username=config.get("username"),
+                password=config.get("password"),
+                instance=config.get("instance"),
+                service=config.get("service"),
+                workspace=config.get("workspace"),
+                vcluster=config.get("vcluster"),
+                schema=config.get("schema") or config.get("database"),
+            )
+            self._volume_type = config.get("volume_type", volume_type)
+            self._volume_name = config.get("volume_name", volume_name)
+        else:
+            # 直接使用连接对象
+            self._connection = connection_or_config
+            self._volume_type = volume_type
+            self._volume_name = volume_name
+
+        if not self._connection:
+            raise ValueError("Valid connection or config is required")
+        if not self._volume_type:
+            raise ValueError("volume_type is required")
+
+        self._permission_cache: dict[str, set[str]] = {}
+        self._current_username = None  # 将从连接中获取当前用户名
+
+    def check_permission(self, operation: VolumePermission, dataset_id: Optional[str] = None) -> bool:
+        """检查用户是否有执行特定操作的权限
+
+        Args:
+            operation: 要执行的操作类型
+            dataset_id: 数据集ID (用于table volume)
+
+        Returns:
+            True if user has permission, False otherwise
+        """
+        try:
+            if self._volume_type == "user":
+                return self._check_user_volume_permission(operation)
+            elif self._volume_type == "table":
+                return self._check_table_volume_permission(operation, dataset_id)
+            elif self._volume_type == "external":
+                return self._check_external_volume_permission(operation)
+            else:
+                logger.warning("Unknown volume type: %s", self._volume_type)
+                return False
+
+        except Exception as e:
+            logger.exception("Permission check failed")
+            return False
+
+    def _check_user_volume_permission(self, operation: VolumePermission) -> bool:
+        """检查User Volume权限
+
+        User Volume权限规则:
+        - 用户对自己的User Volume有全部权限
+        - 只要用户能够连接到ClickZetta，就默认具有User Volume的基本权限
+        - 更注重连接身份验证，而不是复杂的权限检查
+        """
+        try:
+            # 获取当前用户名
+            current_user = self._get_current_username()
+
+            # 检查基本连接状态
+            with self._connection.cursor() as cursor:
+                # 简单的连接测试，如果能执行查询说明用户有基本权限
+                cursor.execute("SELECT 1")
+                result = cursor.fetchone()
+
+                if result:
+                    logger.debug(
+                        "User Volume permission check for %s, operation %s: granted (basic connection verified)",
+                        current_user,
+                        operation.name,
+                    )
+                    return True
+                else:
+                    logger.warning(
+                        "User Volume permission check failed: cannot verify basic connection for %s", current_user
+                    )
+                    return False
+
+        except Exception as e:
+            logger.exception("User Volume permission check failed")
+            # 对于User Volume，如果权限检查失败，可能是配置问题，给出更友好的错误提示
+            logger.info("User Volume permission check failed, but permission checking is disabled in this version")
+            return False
+
+    def _check_table_volume_permission(self, operation: VolumePermission, dataset_id: Optional[str]) -> bool:
+        """检查Table Volume权限
+
+        Table Volume权限规则:
+        - Table Volume权限继承对应表的权限
+        - SELECT权限 -> 可以READ/LIST文件
+        - INSERT,UPDATE,DELETE权限 -> 可以WRITE/DELETE文件
+        """
+        if not dataset_id:
+            logger.warning("dataset_id is required for table volume permission check")
+            return False
+
+        table_name = f"dataset_{dataset_id}" if not dataset_id.startswith("dataset_") else dataset_id
+
+        try:
+            # 检查表权限
+            permissions = self._get_table_permissions(table_name)
+            required_permissions = set(operation.value.split(","))
+
+            # 检查是否有所需的所有权限
+            has_permission = required_permissions.issubset(permissions)
+
+            logger.debug(
+                "Table Volume permission check for %s, operation %s: required=%s, has=%s, granted=%s",
+                table_name,
+                operation.name,
+                required_permissions,
+                permissions,
+                has_permission,
+            )
+
+            return has_permission
+
+        except Exception as e:
+            logger.exception("Table volume permission check failed for %s", table_name)
+            return False
+
+    def _check_external_volume_permission(self, operation: VolumePermission) -> bool:
+        """检查External Volume权限
+
+        External Volume权限规则:
+        - 尝试获取对External Volume的权限
+        - 如果权限检查失败，进行备选验证
+        - 对于开发环境，提供更宽松的权限检查
+        """
+        if not self._volume_name:
+            logger.warning("volume_name is required for external volume permission check")
+            return False
+
+        try:
+            # 检查External Volume权限
+            permissions = self._get_external_volume_permissions(self._volume_name)
+
+            # External Volume权限映射：根据操作类型确定所需权限
+            required_permissions = set()
+
+            if operation in [VolumePermission.READ, VolumePermission.LIST]:
+                required_permissions.add("read")
+            elif operation in [VolumePermission.WRITE, VolumePermission.DELETE]:
+                required_permissions.add("write")
+
+            # 检查是否有所需的所有权限
+            has_permission = required_permissions.issubset(permissions)
+
+            logger.debug(
+                "External Volume permission check for %s, operation %s: required=%s, has=%s, granted=%s",
+                self._volume_name,
+                operation.name,
+                required_permissions,
+                permissions,
+                has_permission,
+            )
+
+            # 如果权限检查失败，尝试备选验证
+            if not has_permission:
+                logger.info("Direct permission check failed for %s, trying fallback verification", self._volume_name)
+
+                # 备选验证：尝试列出Volume来验证基本访问权限
+                try:
+                    with self._connection.cursor() as cursor:
+                        cursor.execute("SHOW VOLUMES")
+                        volumes = cursor.fetchall()
+                        for volume in volumes:
+                            if len(volume) > 0 and volume[0] == self._volume_name:
+                                logger.info("Fallback verification successful for %s", self._volume_name)
+                                return True
+                except Exception as fallback_e:
+                    logger.warning("Fallback verification failed for %s: %s", self._volume_name, fallback_e)
+
+            return has_permission
+
+        except Exception as e:
+            logger.exception("External volume permission check failed for %s", self._volume_name)
+            logger.info("External Volume permission check failed, but permission checking is disabled in this version")
+            return False
+
+    def _get_table_permissions(self, table_name: str) -> set[str]:
+        """获取用户对指定表的权限
+
+        Args:
+            table_name: 表名
+
+        Returns:
+            用户对该表的权限集合
+        """
+        cache_key = f"table:{table_name}"
+
+        if cache_key in self._permission_cache:
+            return self._permission_cache[cache_key]
+
+        permissions = set()
+
+        try:
+            with self._connection.cursor() as cursor:
+                # 使用正确的ClickZetta语法检查当前用户权限
+                cursor.execute("SHOW GRANTS")
+                grants = cursor.fetchall()
+
+                # 解析权限结果，查找对该表的权限
+                for grant in grants:
+                    if len(grant) >= 3:  # 典型格式: (privilege, object_type, object_name, ...)
+                        privilege = grant[0].upper()
+                        object_type = grant[1].upper() if len(grant) > 1 else ""
+                        object_name = grant[2] if len(grant) > 2 else ""
+
+                        # 检查是否是对该表的权限
+                        if (
+                            object_type == "TABLE"
+                            and object_name == table_name
+                            or object_type == "SCHEMA"
+                            and object_name in table_name
+                        ):
+                            if privilege in ["SELECT", "INSERT", "UPDATE", "DELETE", "ALL"]:
+                                if privilege == "ALL":
+                                    permissions.update(["SELECT", "INSERT", "UPDATE", "DELETE"])
+                                else:
+                                    permissions.add(privilege)
+
+                # 如果没有找到明确的权限，尝试执行一个简单的查询来验证权限
+                if not permissions:
+                    try:
+                        cursor.execute(f"SELECT COUNT(*) FROM {table_name} LIMIT 1")
+                        permissions.add("SELECT")
+                    except Exception:
+                        logger.debug("Cannot query table %s, no SELECT permission", table_name)
+
+        except Exception as e:
+            logger.warning("Could not check table permissions for %s: %s", table_name, e)
+            # 安全默认：权限检查失败时拒绝访问
+            pass
+
+        # 缓存权限信息
+        self._permission_cache[cache_key] = permissions
+        return permissions
+
+    def _get_current_username(self) -> str:
+        """获取当前用户名"""
+        if self._current_username:
+            return self._current_username
+
+        try:
+            with self._connection.cursor() as cursor:
+                cursor.execute("SELECT CURRENT_USER()")
+                result = cursor.fetchone()
+                if result:
+                    self._current_username = result[0]
+                    return str(self._current_username)
+        except Exception as e:
+            logger.exception("Failed to get current username")
+
+        return "unknown"
+
+    def _get_user_permissions(self, username: str) -> set[str]:
+        """获取用户的基本权限集合"""
+        cache_key = f"user_permissions:{username}"
+
+        if cache_key in self._permission_cache:
+            return self._permission_cache[cache_key]
+
+        permissions = set()
+
+        try:
+            with self._connection.cursor() as cursor:
+                # 使用正确的ClickZetta语法检查当前用户权限
+                cursor.execute("SHOW GRANTS")
+                grants = cursor.fetchall()
+
+                # 解析权限结果，查找用户的基本权限
+                for grant in grants:
+                    if len(grant) >= 3:  # 典型格式: (privilege, object_type, object_name, ...)
+                        privilege = grant[0].upper()
+                        object_type = grant[1].upper() if len(grant) > 1 else ""
+
+                        # 收集所有相关权限
+                        if privilege in ["SELECT", "INSERT", "UPDATE", "DELETE", "ALL"]:
+                            if privilege == "ALL":
+                                permissions.update(["SELECT", "INSERT", "UPDATE", "DELETE"])
+                            else:
+                                permissions.add(privilege)
+
+        except Exception as e:
+            logger.warning("Could not check user permissions for %s: %s", username, e)
+            # 安全默认：权限检查失败时拒绝访问
+            pass
+
+        # 缓存权限信息
+        self._permission_cache[cache_key] = permissions
+        return permissions
+
+    def _get_external_volume_permissions(self, volume_name: str) -> set[str]:
+        """获取用户对指定External Volume的权限
+
+        Args:
+            volume_name: External Volume名称
+
+        Returns:
+            用户对该Volume的权限集合
+        """
+        cache_key = f"external_volume:{volume_name}"
+
+        if cache_key in self._permission_cache:
+            return self._permission_cache[cache_key]
+
+        permissions = set()
+
+        try:
+            with self._connection.cursor() as cursor:
+                # 使用正确的ClickZetta语法检查Volume权限
+                logger.info("Checking permissions for volume: %s", volume_name)
+                cursor.execute(f"SHOW GRANTS ON VOLUME {volume_name}")
+                grants = cursor.fetchall()
+
+                logger.info("Raw grants result for %s: %s", volume_name, grants)
+
+                # 解析权限结果
+                # 格式: (granted_type, privilege, conditions, granted_on, object_name, granted_to,
+                #       grantee_name, grantor_name, grant_option, granted_time)
+                for grant in grants:
+                    logger.info("Processing grant: %s", grant)
+                    if len(grant) >= 5:
+                        granted_type = grant[0]
+                        privilege = grant[1].upper()
+                        granted_on = grant[3]
+                        object_name = grant[4]
+
+                        logger.info(
+                            "Grant details - type: %s, privilege: %s, granted_on: %s, object_name: %s",
+                            granted_type,
+                            privilege,
+                            granted_on,
+                            object_name,
+                        )
+
+                        # 检查是否是对该Volume的权限或者是层级权限
+                        if (
+                            granted_type == "PRIVILEGE" and granted_on == "VOLUME" and object_name.endswith(volume_name)
+                        ) or (granted_type == "OBJECT_HIERARCHY" and granted_on == "VOLUME"):
+                            logger.info("Matching grant found for %s", volume_name)
+
+                            if "READ" in privilege:
+                                permissions.add("read")
+                                logger.info("Added READ permission for %s", volume_name)
+                            if "WRITE" in privilege:
+                                permissions.add("write")
+                                logger.info("Added WRITE permission for %s", volume_name)
+                            if "ALTER" in privilege:
+                                permissions.add("alter")
+                                logger.info("Added ALTER permission for %s", volume_name)
+                            if privilege == "ALL":
+                                permissions.update(["read", "write", "alter"])
+                                logger.info("Added ALL permissions for %s", volume_name)
+
+                logger.info("Final permissions for %s: %s", volume_name, permissions)
+
+                # 如果没有找到明确的权限，尝试查看Volume列表来验证基本权限
+                if not permissions:
+                    try:
+                        cursor.execute("SHOW VOLUMES")
+                        volumes = cursor.fetchall()
+                        for volume in volumes:
+                            if len(volume) > 0 and volume[0] == volume_name:
+                                permissions.add("read")  # 至少有读权限
+                                logger.debug("Volume %s found in SHOW VOLUMES, assuming read permission", volume_name)
+                                break
+                    except Exception:
+                        logger.debug("Cannot access volume %s, no basic permission", volume_name)
+
+        except Exception as e:
+            logger.warning("Could not check external volume permissions for %s: %s", volume_name, e)
+            # 在权限检查失败时，尝试基本的Volume访问验证
+            try:
+                with self._connection.cursor() as cursor:
+                    cursor.execute("SHOW VOLUMES")
+                    volumes = cursor.fetchall()
+                    for volume in volumes:
+                        if len(volume) > 0 and volume[0] == volume_name:
+                            logger.info("Basic volume access verified for %s", volume_name)
+                            permissions.add("read")
+                            permissions.add("write")  # 假设有写权限
+                            break
+            except Exception as basic_e:
+                logger.warning("Basic volume access check failed for %s: %s", volume_name, basic_e)
+                # 最后的备选方案：假设有基本权限
+                permissions.add("read")
+
+        # 缓存权限信息
+        self._permission_cache[cache_key] = permissions
+        return permissions
+
+    def clear_permission_cache(self):
+        """清空权限缓存"""
+        self._permission_cache.clear()
+        logger.debug("Permission cache cleared")
+
+    def get_permission_summary(self, dataset_id: Optional[str] = None) -> dict[str, bool]:
+        """获取权限摘要
+
+        Args:
+            dataset_id: 数据集ID (用于table volume)
+
+        Returns:
+            权限摘要字典
+        """
+        summary = {}
+
+        for operation in VolumePermission:
+            summary[operation.name.lower()] = self.check_permission(operation, dataset_id)
+
+        return summary
+
+    def check_inherited_permission(self, file_path: str, operation: VolumePermission) -> bool:
+        """检查文件路径的权限继承
+
+        Args:
+            file_path: 文件路径
+            operation: 要执行的操作
+
+        Returns:
+            True if user has permission, False otherwise
+        """
+        try:
+            # 解析文件路径
+            path_parts = file_path.strip("/").split("/")
+
+            if not path_parts:
+                logger.warning("Invalid file path for permission inheritance check")
+                return False
+
+            # 对于Table Volume，第一层是dataset_id
+            if self._volume_type == "table":
+                if len(path_parts) < 1:
+                    return False
+
+                dataset_id = path_parts[0]
+
+                # 检查对dataset的权限
+                has_dataset_permission = self.check_permission(operation, dataset_id)
+
+                if not has_dataset_permission:
+                    logger.debug("Permission denied for dataset %s", dataset_id)
+                    return False
+
+                # 检查路径遍历攻击
+                if self._contains_path_traversal(file_path):
+                    logger.warning("Path traversal attack detected: %s", file_path)
+                    return False
+
+                # 检查是否访问敏感目录
+                if self._is_sensitive_path(file_path):
+                    logger.warning("Access to sensitive path denied: %s", file_path)
+                    return False
+
+                logger.debug("Permission inherited for path %s", file_path)
+                return True
+
+            elif self._volume_type == "user":
+                # User Volume的权限继承
+                current_user = self._get_current_username()
+
+                # 检查是否试图访问其他用户的目录
+                if len(path_parts) > 1 and path_parts[0] != current_user:
+                    logger.warning("User %s attempted to access %s's directory", current_user, path_parts[0])
+                    return False
+
+                # 检查基本权限
+                return self.check_permission(operation)
+
+            elif self._volume_type == "external":
+                # External Volume的权限继承
+                # 检查对External Volume的权限
+                return self.check_permission(operation)
+
+            else:
+                logger.warning("Unknown volume type for permission inheritance: %s", self._volume_type)
+                return False
+
+        except Exception as e:
+            logger.exception("Permission inheritance check failed")
+            return False
+
+    def _contains_path_traversal(self, file_path: str) -> bool:
+        """检查路径是否包含路径遍历攻击"""
+        # 检查常见的路径遍历模式
+        traversal_patterns = [
+            "../",
+            "..\\",
+            "..%2f",
+            "..%2F",
+            "..%5c",
+            "..%5C",
+            "%2e%2e%2f",
+            "%2e%2e%5c",
+            "....//",
+            "....\\\\",
+        ]
+
+        file_path_lower = file_path.lower()
+
+        for pattern in traversal_patterns:
+            if pattern in file_path_lower:
+                return True
+
+        # 检查绝对路径
+        if file_path.startswith("/") or file_path.startswith("\\"):
+            return True
+
+        # 检查Windows驱动器路径
+        if len(file_path) >= 2 and file_path[1] == ":":
+            return True
+
+        return False
+
+    def _is_sensitive_path(self, file_path: str) -> bool:
+        """检查路径是否为敏感路径"""
+        sensitive_patterns = [
+            "passwd",
+            "shadow",
+            "hosts",
+            "config",
+            "secrets",
+            "private",
+            "key",
+            "certificate",
+            "cert",
+            "ssl",
+            "database",
+            "backup",
+            "dump",
+            "log",
+            "tmp",
+        ]
+
+        file_path_lower = file_path.lower()
+
+        return any(pattern in file_path_lower for pattern in sensitive_patterns)
+
+    def validate_operation(self, operation: str, dataset_id: Optional[str] = None) -> bool:
+        """验证操作权限
+
+        Args:
+            operation: 操作名称 (save|load|exists|delete|scan)
+            dataset_id: 数据集ID
+
+        Returns:
+            True if operation is allowed, False otherwise
+        """
+        operation_mapping = {
+            "save": VolumePermission.WRITE,
+            "load": VolumePermission.READ,
+            "load_once": VolumePermission.READ,
+            "load_stream": VolumePermission.READ,
+            "download": VolumePermission.READ,
+            "exists": VolumePermission.READ,
+            "delete": VolumePermission.DELETE,
+            "scan": VolumePermission.LIST,
+        }
+
+        if operation not in operation_mapping:
+            logger.warning("Unknown operation: %s", operation)
+            return False
+
+        volume_permission = operation_mapping[operation]
+        return self.check_permission(volume_permission, dataset_id)
+
+
+class VolumePermissionError(Exception):
+    """Volume权限错误异常"""
+
+    def __init__(self, message: str, operation: str, volume_type: str, dataset_id: Optional[str] = None):
+        self.operation = operation
+        self.volume_type = volume_type
+        self.dataset_id = dataset_id
+        super().__init__(message)
+
+
+def check_volume_permission(
+    permission_manager: VolumePermissionManager, operation: str, dataset_id: Optional[str] = None
+) -> None:
+    """权限检查装饰器函数
+
+    Args:
+        permission_manager: 权限管理器
+        operation: 操作名称
+        dataset_id: 数据集ID
+
+    Raises:
+        VolumePermissionError: 如果没有权限
+    """
+    if not permission_manager.validate_operation(operation, dataset_id):
+        error_message = f"Permission denied for operation '{operation}' on {permission_manager._volume_type} volume"
+        if dataset_id:
+            error_message += f" (dataset: {dataset_id})"
+
+        raise VolumePermissionError(
+            error_message,
+            operation=operation,
+            volume_type=permission_manager._volume_type or "unknown",
+            dataset_id=dataset_id,
+        )

api/extensions/storage/storage_type.py

@@ -5,6 +5,7 @@ class StorageType(StrEnum):
     ALIYUN_OSS = "aliyun-oss"
     AZURE_BLOB = "azure-blob"
     BAIDU_OBS = "baidu-obs"
+    CLICKZETTA_VOLUME = "clickzetta-volume"
     GOOGLE_STORAGE = "google-storage"
     HUAWEI_OBS = "huawei-obs"
     LOCAL = "local"