mirror of
https://github.com/hwchase17/langchain
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ea67c049f0
Adds support for statements such as insert, update etc which do not return any rows. `engine.execute` is deprecated and so execution has been updated to use `connection.exec_driver_sql` as-per: https://docs.sqlalchemy.org/en/14/core/connections.html#sqlalchemy.engine.Engine.execute
48 lines
1.9 KiB
Python
48 lines
1.9 KiB
Python
"""Test SQL Database Chain."""
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from sqlalchemy import Column, Integer, MetaData, String, Table, create_engine, insert
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from langchain.chains.sql_database.base import SQLDatabaseChain
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from langchain.llms.openai import OpenAI
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from langchain.sql_database import SQLDatabase
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metadata_obj = MetaData()
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user = Table(
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"user",
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metadata_obj,
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Column("user_id", Integer, primary_key=True),
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Column("user_name", String(16), nullable=False),
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Column("user_company", String(16), nullable=False),
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)
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def test_sql_database_run() -> None:
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"""Test that commands can be run successfully and returned in correct format."""
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engine = create_engine("sqlite:///:memory:")
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metadata_obj.create_all(engine)
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stmt = insert(user).values(user_id=13, user_name="Harrison", user_company="Foo")
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with engine.connect() as conn:
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conn.execute(stmt)
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db = SQLDatabase(engine)
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db_chain = SQLDatabaseChain(llm=OpenAI(temperature=0), database=db)
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output = db_chain.run("What company does Harrison work at?")
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expected_output = " Harrison works at Foo."
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assert output == expected_output
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def test_sql_database_run_update() -> None:
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"""Test that update commands run successfully and returned in correct format."""
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engine = create_engine("sqlite:///:memory:")
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metadata_obj.create_all(engine)
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stmt = insert(user).values(user_id=13, user_name="Harrison", user_company="Foo")
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with engine.connect() as conn:
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conn.execute(stmt)
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db = SQLDatabase(engine)
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db_chain = SQLDatabaseChain(llm=OpenAI(temperature=0), database=db)
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output = db_chain.run("Update Harrison's workplace to Bar")
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expected_output = " Harrison's workplace has been updated to Bar."
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assert output == expected_output
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output = db_chain.run("What company does Harrison work at?")
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expected_output = " Harrison works at Bar."
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assert output == expected_output
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