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@@ -7,9 +7,42 @@ https://docs.snowflake.com/
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Source code is also available at: https://github.com/snowflakedb/snowflake-connector-python
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# Release Notes
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- v3.18(TBD)
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- v4.1.0(TBD)
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- Added the `SNOWFLAKE_AUTH_FORCE_SERVER` environment variable to force the use of the local-listening server when using the `externalbrowser` auth method.
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- This allows headless environments (like Docker or Airflow) running locally to auth via a browser URL.
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- Fix compilation error when building from sources with libc++.
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- v4.0.0(October 09,2025)
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- Added support for checking certificates revocation using revocation lists (CRLs)
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- Added `CERT_REVOCATION_CHECK_MODE` to `CLIENT_ENVIRONMENT`
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- Added the `workload_identity_impersonation_path` parameter to support service account impersonation for Workload Identity Federation on GCP and AWS workloads only
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- Fixed `get_results_from_sfqid` when using `DictCursor` and executing multiple statements at once
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- Added the `oauth_credentials_in_body` parameter supporting an option to send the oauth client credentials in the request body
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- Fix retry behavior for `ECONNRESET` error
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- Added an option to exclude `botocore` and `boto3` dependencies by setting `SNOWFLAKE_NO_BOTO` environment variable during installation
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- Revert changing exception type in case of token expired scenario for `Oauth` authenticator back to `DatabaseError`
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- Enhanced configuration file security checks with stricter permission validation.
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- Configuration files writable by group or others now raise a `ConfigSourceError` with detailed permission information, preventing potential credential tampering.
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- Fixed the return type of `SnowflakeConnection.cursor(cursor_class)` to match the type of `cursor_class`
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- Constrained the types of `fetchone`, `fetchmany`, `fetchall`
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- As part of this fix, `DictCursor` is no longer a subclass of `SnowflakeCursor`; use `SnowflakeCursorBase` as a superclass of both.
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- Fix "No AWS region was found" error if AWS region was set in `AWS_DEFAULT_REGION` variable instead of `AWS_REGION` for `WORKLOAD_IDENTITY` authenticator
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- Add `ocsp_root_certs_dict_lock_timeout` connection parameter to set the timeout (in seconds) for acquiring the lock on the OCSP root certs dictionary. Default value for this parameter is -1 which indicates no timeout.
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- Fixed behaviour of trying S3 Transfer Accelerate endpoint by default for internal stages, and always getting HTTP403 due to permissions missing on purpose. Now /accelerate is not attempted.
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- v3.18.0(October 03,2025)
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- Added support for pandas conversion for Day-time and Year-Month Interval types
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- v3.17.4(September 22,2025)
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- Added support for intermediate certificates as roots when they are stored in the trust store
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- Bumped up vendored `urllib3` to `2.5.0` and `requests` to `v2.32.5`
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- Dropped support for OpenSSL versions older than 1.1.1
- Improved warning messages for readable permission issues to include clear instructions on how to skip warnings using the `SF_SKIP_WARNING_FOR_READ_PERMISSIONS_ON_CONFIG_FILE` environment variable.
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- Fixed the bug with staging pandas dataframes on AWS - the regional endpoint is used when required
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- This addresses the issue with `create_dataframe` call on Snowpark
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- v3.17.2(August 23,2025)
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- Fixed a bug where platform_detection was retrying failed requests with warnings to non-existent endpoints.
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