How to Resolve Snowflake Connection Issues in Python

If you're encountering the "Could not connect" error when attempting to connect to Snowflake using Python, this guide will help you troubleshoot and resolve the issue.

Problem Overview

When trying to connect to Snowflake using the following code:

from langchain import OpenAI, SQLDatabase
from snowflake.snowpark import Session
from langchain.chains import create_sql_query_chain

snowflake_account = "XXXXX"
username = "xxxx"
password = "xxxxxxx"
database= "eg_db"
schema = "eg_sc"
warehouse = "COMPUTE_WH"
role = "ACCOUNTADMIN"

snowflake_url = f"snowflake://{username}:{password}@{snowflake_account}/{database}/{schema}?warehouse={warehouse}&role={role}"

db = SQLDatabase.from_uri(snowflake_url, sample_rows_in_table_info=1, include_tables=['table1','table2'])

print(db.table_info)
    

You may encounter a connection error. Below are common issues and their solutions.

Solution

1. Check Snowflake Account Identifier Format

Ensure that the snowflake_account string is correctly formatted. Depending on your Snowflake account configuration, the account identifier can vary. Here are some examples:

• Without Region & Cloud: accountname
• With Region & Cloud: accountname.region.cloud(gcp)
• With Org Name: orgname-accountname.region.cloud(gcp)

2. Verify Connection Parameters

Ensure that all connection parameters (username, password, database, schema, warehouse, role) are correct. Even a small typo can cause connection failures.

3. Check Snowflake URL Structure

Ensure that the Snowflake URL is correctly structured. Verify that there are no extra spaces or incorrect characters.

4. Confirm Network Access

Ensure that your network settings allow connections to Snowflake. If you're behind a firewall, you may need to whitelist Snowflake's IP addresses or configure a proxy.

5. Test with Snowflake CLI

If the connection still fails, try connecting using Snowflake's CLI (SnowSQL) to ensure your credentials and network settings are correct.

Conclusion

By following the above steps, you should be able to resolve the "Could not connect" error and successfully connect to Snowflake using Python. If you continue to experience issues, consider reaching out to Snowflake support for further assistance.