class DatabaseError(Exception):
    """Base exception for database errors."""

    pass


class QueryExecutionError(DatabaseError):
    """Exception raised when a database query fails."""

    pass


class EmbeddingError(Exception):
    """Base exception for embedding-related errors."""

    pass


class OpenAIError(EmbeddingError):
    """Exception raised when OpenAI API fails."""

    pass


class HuggingFaceError(Exception):
    """Base exception for Hugging Face-related errors."""

    pass


class DatasetNotFoundError(HuggingFaceError):
    """Exception raised when a dataset is not found."""

    pass


class DatasetPushError(HuggingFaceError):
    """Exception raised when pushing a dataset to Hugging Face Hub fails."""

    pass


class DatasetDeleteError(HuggingFaceError):
    """Exception raised when deleting a dataset on Hugging Face Hub fails."""

    pass