Source code for langchain_community.tools.dataherald.tool

"""数据传输主机API的工具"""

from typing import Optional, Type

from langchain_core.callbacks import CallbackManagerForToolRun
from langchain_core.pydantic_v1 import BaseModel, Field
from langchain_core.tools import BaseTool

from langchain_community.utilities.dataherald import DataheraldAPIWrapper


class DataheraldTextToSQLInput(BaseModel):
    prompt: str = Field(
        description="Natural language query to be translated to a SQL query."
    )


class DataheraldTextToSQL(BaseTool):
    """工具使用Dataherald SDK 进行查询。"""

    name: str = "dataherald"
    description: str = (
        "A wrapper around Dataherald. "
        "Text to SQL. "
        "Input should be a prompt and an existing db_connection_id"
    )
    api_wrapper: DataheraldAPIWrapper
    args_schema: Type[BaseModel] = DataheraldTextToSQLInput

    def _run(
        self,
        prompt: str,
        run_manager: Optional[CallbackManagerForToolRun] = None,
    ) -> str:
        """使用Dataherald工具。"""
        return self.api_wrapper.run(prompt)