Dataherald

Dataherald 是一个自然语言到 SQL 的工具。

本页面介绍如何在 LangChain 中使用 Dataherald API。

安装与设置¶

使用以下命令安装依赖项

pip install dataherald

前往 dataherald 并注册这里
创建一个应用并获得您的 API KEY
将您的 API KEY 设置为环境变量 DATAHERALD_API_KEY

包装器

实用工具

存在一个 DataheraldAPIWrapper 实用工具，它封装了该 API。要导入此实用工具：

from langchain_community.utilities.dataherald import DataheraldAPIWrapper

API 参考:DataheraldAPI包装器

关于此包装器的更详细逐步指南，请参阅此笔记本。

工具¶

您可以像这样在智能体中使用该工具：

from langchain_community.utilities.dataherald import DataheraldAPIWrapper
from langchain_community.tools.dataherald.tool import DataheraldTextToSQL
from langchain_openai import ChatOpenAI
from langchain import hub
from langchain.agents import AgentExecutor, create_react_agent, load_tools

api_wrapper = DataheraldAPIWrapper(db_connection_id="<db_connection_id>")
tool = DataheraldTextToSQL(api_wrapper=api_wrapper)
llm = ChatOpenAI(model="gpt-3.5-turbo", temperature=0)
prompt = hub.pull("hwchase17/react")
agent = create_react_agent(llm, tools, prompt)
agent_executor = AgentExecutor(agent=agent, tools=tools, verbose=True, handle_parsing_errors=True)
agent_executor.invoke({"input":"Return the sql for this question: How many employees are in the company?"})

输出

> Entering new AgentExecutor chain...
I need to use a tool that can convert this question into SQL.
Action: dataherald
Action Input: How many employees are in the company?Answer: SELECT
    COUNT(*) FROM employeesI now know the final answer
Final Answer: SELECT
    COUNT(*)
FROM
    employees

> Finished chain.
{'input': 'Return the sql for this question: How many employees are in the company?', 'output': "SELECT \n    COUNT(*)\nFROM \n    employees"}

有关工具的更多信息，请参阅此页面。

安装与设置¶

包装器​

实用工具​

工具¶

包装器

实用工具