通过fu过 Function Calling 查询数据库

from openai import OpenAI
import os
import json

from dotenv import load_dotenv, find_dotenv
_ = load_dotenv(find_dotenv()) # 读取本地 .env 文件，里面定义了 OPENAI_API_KE

client = OpenAI(
api_key=os.getenv(“OPENAI_API_KEY”),
base_url=os.getenv(“OPENAI_BASE_URL”)
)

def get_sql_completion(messages, model=“gpt-3.5-turbo-1106”):
response = client.chat.completions.create(
model=model,
messages=messages,
temperature=0,
tools=[{ # 摘自 OpenAI 官方示例 https://github.com/openai/openai-cookbook/blob/main/examples/How_to_call_functions_with_chat_models.ipynb
“type”: “function”,
“function”: {
“name”: “ask_database”,
“description”: “Use this function to answer user questions about business.
Output should be a fully formed SQL query.”,
“parameters”: {
“type”: “object”,
“properties”: {
“query”: {
“type”: “string”,
“description”: f"“”
SQL query extracting info to answer the user’s question.
SQL should be written using this database schema:
{database_schema_string}
The query should be returned in plain text, not in JSON.
The query should only contain grammars supported by SQLite.
“”",
}
},
“required”: [“query”],
}
}
}],
)
return response.choices[0].message

描述数据库表结构

database_schema_string = “”"
CREATE TABLE orders (
id INT PRIMARY KEY NOT NULL, – 主键，不允许为空
customer_id INT NOT NULL, – 客户ID，不允许为空
product_id STR NOT NULL, – 产品ID，不允许为空
price DECIMAL(10,2) NOT NULL, – 价格，不允许为空
status INT NOT NULL, – 订单状态，整数类型，不允许为空。0代表待支付，1代表已支付，2代表已退款
create_time TIMESTAMP DEFAULT CURRENT_TIMESTAMP, – 创建时间，默认为当前时间
pay_time TIMESTAMP – 支付时间，可以为空
);
“”"

import sqlite3

创建数据库连接

conn = sqlite3.connect(‘:memory:’)
cursor = conn.cursor()

创建orders表

cursor.execute(database_schema_string)

插入5条明确的模拟记录

mock_data = [
(1, 1001, ‘TSHIRT_1’, 50.00, 0, ‘2023-10-12 10:00:00’, None),
(2, 1001, ‘TSHIRT_2’, 75.50, 1, ‘2023-10-16 11:00:00’, ‘2023-08-16 12:00:00’),
(3, 1002, ‘SHOES_X2’, 25.25, 2, ‘2023-10-17 12:30:00’, ‘2023-08-17 13:00:00’),
(4, 1003, ‘HAT_Z112’, 60.75, 1, ‘2023-10-20 14:00:00’, ‘2023-08-20 15:00:00’),
(5, 1002, ‘WATCH_X001’, 90.00, 0, ‘2023-10-28 16:00:00’, None)
]

for record in mock_data:
cursor.execute(‘’’
INSERT INTO orders (id, customer_id, product_id, price, status, create_time, pay_time)
VALUES (?, ?, ?, ?, ?, ?, ?)
‘’', record)

提交事务

conn.commit()

def ask_database(query):
cursor.execute(query)
records = cursor.fetchall()
return records

prompt = “上个月的销售额”

prompt = “统计每月每件商品的销售额”

prompt = “哪个用户消费最高？消费多少？”

messages = [
{“role”: “system”, “content”: “基于 order 表回答用户问题”},
{“role”: “user”, “content”: prompt}
]
response = get_sql_completion(messages)
if response.content is None:
response.content = “”
messages.append(response)
print(“Function Calling”)
print(response)

if response.tool_calls is not None:
tool_call = response.tool_calls[0]
if tool_call.function.name == “ask_database”:
arguments = tool_call.function.arguments
args = json.loads(arguments)
print(“SQL”)
print(args[“query”])
result = ask_database(args[“query”])
print(“DB Records”)
print(result)

    messages.append({
        "tool_call_id": tool_call.id,
        "role": "tool",
        "name": "ask_database",
        "content": str(result)
    })
    response = get_sql_completion(messages)
    print("====最终回复====")
    print(response.content)