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  • Been using Monolingual for a long time and love its function. Am currently using version 1.7.2 on Mac OS X 10.11.2. However, since installing the 10.11.2 update to OS X Monolingual is no longer erasing the non-english lproj files in any of the Apps written by Apple. I haven't checked every app but App Store, Time Machine, Automator, Calculator, Calenday, Chess, Contacts and the others that I have checked all still have all of the non-english lproj files within the apps resources folder. It did clean the foreign languages out of non-Apple apps. Have run Monolingual several times and rebooted the machines but still those files exist. I hope that Apple has not taken security to the point to where Monolingual can no longer be used effectively.
  • This is an update to my original posting. I'm continuing to have the same problem with 1.7.2. It does not run on my machine and I am forced to continue to download and use 1.6.7. The program boots, but will not run. Immediately after I enter my password to grant administrator authority to the program a screen pops up indicating that it 'Failed to install helper utility'. I have removed and reinstalled the program seven times. Each time I remove it using the App Cleaner program and reloaded it by downloading a fresh copy of the file from the website // . I love the program and it's ease of use, but I would like to make it functional again. It started having this problem as soon as I upgraded from 10.10.4 to 10.10.5 and it remains a problem now that I have El Capitan installed. Are there any suggestions how to fix this so that I can upgrade to the latest version?
  • Great program, simple, unobtrusive, does what it has to do very well, I recommended it to a lot of people. Now beta testing on el Capitan, in one installation it is working normally, the other I have to check.
  • Monolingual seems to be broken for Mavericks. It worked great on my older Mac Pro work computer which is on Lion, but I get the same 'Monolingual is damaged and can't be opened. You should move it to the trash' error message on my personal Macbook Pro running Mavericks. It deleted 1.5GB of unneeded crap off of my work computer, and I need the space here. Please fix!
  • There are no instructions for this app. On 10.9.2 with version 1.5.10, I get an error message when I click on the icon: 'Monolingual' is damaged and cannot be opened. You should eject the disk image.'
Read more reviews >Latest version


Snowflake Connector for Python

Project description

This package includes the Snowflake Connector for Python, which conforms to the Python DB API 2.0 specification:

Snowflake Documentation is available at:

Source code is also available at:

Release Notes

  • v2.7.1(November 19,2021)

    • Fixed a bug where uploading a streaming file with multiple parts did not work.
    • JWT tokens are now regenerated when a request is retired.
    • Updated URL escaping when uploading to AWS S3 to match how S3 escapes URLs.
    • Removed the unused s3_connection_pool_size connection parameter.
    • Blocked queries are now be considered to be still running.
    • Snowflake specific exceptions are now set using Exception arguments.
    • Fixed an issue where use_s3_regional_url was not set correctly by the connector.
  • v2.7.0(October 25,2021)

    • Removing cloud sdks.snowflake-connector-python will not install them anymore. Recreate your virtualenv to get rid of unnecessary dependencies.
    • Include Standard C++ headers.
    • Update minimum dependency version pin of cryptography.
    • Fixed a bug where error number would not be added to Exception messages.
    • Fixed a bug where client_prefetch_threads parameter was not respected when pre-fetching results.
    • Update signature of SnowflakeCursor.execute’s params argument.
  • v2.6.2(September 27,2021)

    • Updated vendored urllib3 and requests versions.
    • Fixed a bug where GET commands would fail to download files from sub directories from stages.
    • Added a feature where where the connector will print the url it tried to open when it is unable to open it for external browser authentication.
  • v2.6.1(September 16,2021)

    • Bump pandas version from <1.3 to <1.4
    • Fixing Python deprecation warnings.
    • Added more type-hints.
    • Marked HeartBeatTimer threads as daemon threads.
    • Force cast a column into integer in write_pandas to avoid a rare behavior that would lead to crashing.
    • Implement AWS signature V4 to new SDKless PUT and GET.
    • Removed a deprecated setuptools option from
    • Fixed a bug where error logs would be printed for query executions that produce no results.
    • Fixed a bug where the temporary stage for bulk array inserts exists.
  • v2.6.0(August 29,2021)

    • Internal change to the implementation of result fetching.
    • Upgraded Pyarrow version from 3.0 to 5.0.
    • Internal change to the implementation for PUT and GET. A new connection parameter use_new_put_get was added to toggle between implementations.
    • Fixed a bug where executemany did not detect the type of data it was inserting.
    • Updated the minimum Mac OSX build target from 10.13 to 10.14.
  • v2.5.1(July 31,2021)

    • Fixes Python Connector bug that prevents the connector from using AWS S3 Regional URL. The driver currently overrides the regional URL information with the default S3 URL causing failure in PUT.
  • v2.5.0(July 22,2021)

    • Fixed a bug in write_pandas when quote_identifiers is set to True the function would not actually quote column names.
    • Bumping idna dependency pin from <3,>=2.5 to >=2.5,<4
    • Fix describe method when running insert into … commands
  • v2.4.6(June 25,2021)

    • Fixed a potential memory leak.
    • Removed upper certifi version pin.
    • Updated vendored libraries , urllib(1.26.5) and requests(2.25.1).
    • Replace pointers with UniqueRefs.
    • Changed default value of client_session_keep_alive to None.
    • Added the ability to retrieve metadata/schema without executing the query (describe method).
  • v2.4.5(June 15,2021)

    • Fix for incorrect JWT token invalidity when an account alias with a dash in it is used for regionless account URL.
  • v2.4.4(May 30,2021)

    • Fixed a segfault issue when using DictCursor and arrow result format with out of range dates.
    • Adds new make_pd_writer helper function
  • v2.4.3(April 29,2021)

    • Uses s3 regional URL in private links when a param is set.
    • New Arrow NUMBER to Decimal converter option.
    • Update pyopenssl requirement from <20.0.0,>=16.2.0 to >=16.2.0,<21.0.0.
    • Update pandas requirement from <1.2.0,>=1.0.0 to >=1.0.0,<1.3.0.
    • Update numpy requirement from <1.20.0 to <1.21.0.
  • v2.4.2(April 03,2021)

    • PUT statements are now thread-safe.
  • v2.4.1(March 04,2021)

    • Make connection object exit() aware of status of parameter autocommit
  • v2.4.0(March 04,2021)

    • Added support for Python 3.9 and PyArrow 3.0.x.
    • Added support for the upcoming multipart PUT threshold keyword.
    • Added support for using the PUT command with a file-like object.
    • Added some compilation flags to ease building conda community package.
    • Removed the pytz pin because it doesn’t follow semantic versioning release format.
    • Added support for optimizing batch inserts through bulk array binding.
  • v2.3.10(February 01,2021)

    • Improved query ID logging and added request GUID logging.
    • For dependency checking, increased the version condition for the pyjwt package from <2.0.0 to <3.0.0.
  • v2.3.9(January 27,2021)

    • The fix to add proper proxy CONNECT headers for connections made over proxies.
  • v2.3.8(January 14,2021)

    • Arrow result conversion speed up.
    • Send all Python Connector exceptions to in-band or out-of-band telemetry.
    • Vendoring requests and urllib3 to contain OCSP monkey patching to our library only.
    • Declare dependency on setuptools.
  • v2.3.7(December 10,2020)

    • Added support for upcoming downscoped GCS credentials.
    • Tightened the pyOpenSSL dependency pin.
    • Relaxed the boto3 dependency pin up to the next major release.
    • Relaxed the cffi dependency pin up to the next major release.
    • Added support for executing asynchronous queries.
    • Dropped support for Python 3.5.
  • v2.3.6(November 16,2020)

    • Fixed a bug that was preventing the connector from working on Windows with Python 3.8.
    • Improved the string formatting in exception messages.
    • For dependency checking, increased the version condition for the cryptography package from <3.0.0 to <4.0.0.
    • For dependency checking, increased the version condition for the pandas package from <1.1 to <1.2.
  • v2.3.5(November 03,2020)

    • Updated the dependency on the cryptography package from version 2.9.2 to 3.2.1.
  • v2.3.4(October 26,2020)

    • Added an optional parameter to the write_pandas function to specify that identifiers should not be quoted before being sent to the server.
    • The write_pandas function now honors default and auto-increment values for columns when inserting new rows.
    • Updated the Python Connector OCSP error messages and accompanying telemetry Information.
    • Enabled the runtime pyarrow version verification to fail gracefully. Fixed a bug with AWS glue environment.
    • Upgraded the version of boto3 from 1.14.47 to 1.15.9.
    • Upgraded the version of idna from 2.9 to 2.10.
  • v2.3.3(October 05,2020)

    • Simplified the configuration files by consolidating test settings.
    • In the Connection object, the execute_stream and execute_string methods now filter out empty lines from their inputs.
  • v2.3.2(September 14,2020)

    • Fixed a bug where a file handler was not closed properly.
    • Fixed various documentation typos.
  • v2.3.1(August 25,2020)

    • Fixed a bug where 2 constants were removed by mistake.
  • v2.3.0(August 24,2020)

    • When the log level is set to DEBUG, log the OOB telemetry entries that are sent to Snowflake.
    • Fixed a bug in the PUT command where long running PUTs would fail to re-authenticate to GCP for storage.
    • Updated the minimum build target MacOS version to 10.13.
  • v2.2.10(August 03,2020)

    • Improved an error message for when “pandas” optional dependency group is not installed and user tries to fetch data into a pandas DataFrame. It’ll now point user to our online documentation.
  • v2.2.9(July 13,2020)

    • Connection parameter validate_default_parameters now verifies known connection parameter names and types. It emits warnings for anything unexpected types or names.
    • Correct logging messages for compiled C++ code.
    • Fixed an issue in write_pandas with location determination when database, or schema name was included.
    • Bumped boto3 dependency version.
    • Fixed an issue where uploading a file with special UTF-8 characters in their names corrupted file.
  • v2.2.8(June 22,2020)

    • Switched docstring style to Google from Epydoc and added automated tests to enforce the standard.
    • Fixed a memory leak in DictCursor’s Arrow format code.
  • v2.2.7(June 1,2020)

    • Support azure-storage-blob v12 as well as v2 (for Python 3.5.0-3.5.1) by Python Connector
    • Fixed a bug where temporary directory path was not Windows compatible in write_pandas function
    • Added out of band telemetry error reporting of unknown errors
  • v2.2.6(May 11,2020)

    • Update Pyarrow version from 0.16.0 to 0.17.0 for Python connector
    • Remove more restrictive application name enforcement.
    • Missing keyring dependency will not raise an exception, only emit a debug log from now on.
    • Bumping boto3 to <1.14
    • Fix flake8 3.8.0 new issues
    • Implement Python log interceptor
  • v2.2.5(April 30,2020)

    • Added more efficient way to ingest a pandas.Dataframe into Snowflake, located in snowflake.connector.pandas_tools
    • More restrictive application name enforcement and standardizing it with other Snowflake drivers
    • Added checking and warning for users when they have a wrong version of pyarrow installed
  • v2.2.4(April 10,2020)

    • Emit warning only if trying to set different setting of use_openssl_only parameter
  • v2.2.3(March 30,2020)

    • Secure SSO ID Token
    • Add use_openssl_only connection parameter, which disables the usage of pure Python cryptographic libraries for FIPS
    • Add manylinux1 as well as manylinux2010
    • Fix a bug where a certificate file was opened and never closed in snowflake-connector-python.
    • Fix python connector skips validating GCP URLs
    • Adds additional client driver config information to in band telemetry.
  • v2.2.2(March 9,2020)

    • Fix retry with for stability.
    • Support Python 3.8 for Linux and Mac.
  • v2.2.1(February 18,2020)

    • Fix use DictCursor with execute_string #248
  • v2.2.0(January 27,2020)

    • Drop Python 2.7 support
    • AWS: When OVERWRITE is false, which is set by default, the file is uploaded if no same file name exists in the stage. This used to check the content signature but it will no longer check. Azure and GCP already work this way.
    • Document Python connector dependencies on our GitHub page in addition to Snowflake docs.
    • Fix sqlalchemy and possibly python-connector warnings.
    • Fix GCP exception using the Python connector to PUT a file in a stage with auto_compress=false.
    • Bump up botocore requirements to 1.14.
    • Fix uppercaseing authenticator breaks Okta URL which may include case-sensitive elements(#257).
    • Fix wrong result bug while using fetch_pandas_all() to get fixed numbers with large scales.
    • Increase multi part upload threshold for S3 to 64MB.
  • v2.1.3(January 06,2020)

    • Fix GCP Put failed after hours
  • v2.1.2(December 16,2019)

    • Fix the arrow bundling issue for python connector on mac.
    • Fix the arrow dll bundle issue on windows.Add more logging.
  • v2.1.1(December 12,2019)

    • Fix GZIP uncompressed content for Azure GET command.
    • Add support for GCS PUT and GET for private preview.
    • Support fetch as numpy value in arrow result format.
    • Fix NameError: name ‘EmptyPyArrowIterator’ is not defined for Mac.
    • Return empty dataframe for fetch_pandas_all() api if result set is empty.
  • v2.1.0(December 2,2019)

    • Fix default ssl_context options
    • Pin more dependencies for Python Connector
    • Fix import of SnowflakeOCSPAsn1Crypto crashes Python on MacOS Catalina
    • Update the release note that 1.9.0 was removed
    • Support DictCursor for arrow result format
    • Upgrade Python’s arrow lib to 0.15.1
    • Raise Exception when PUT fails to Upload Data
    • Handle year out of range correctly in arrow result format
  • v2.0.4(November 13,2019)

    • Increase OCSP Cache expiry time from 24 hours to 120 hours.
    • Fix pyarrow cxx11 abi compatibility issue
    • Use new query result format parameter in python tests
  • v2.0.3(November 1,2019)

    • Fix for ,Pandas fetch API did not handle the case that first chunk is empty correctly.
    • Updated with botocore, boto3 and requests packages to the latest version.
    • Pinned stable versions of Azure urllib3 packages.
  • v2.0.2(October 21,2019)

    • Fix sessions remaining open even if they are disposed manually. Retry deleting session if the connection is explicitly closed.
    • Fix memory leak in the new fetch pandas API
    • Fix Auditwheel failed with python37
    • Reduce the footprint of Python Connector
    • Support asn1crypto 1.1.x
    • Ensure that the cython components are present for Conda package
  • v2.0.1(October 04,2019)

    • Add asn1crypto requirement to mitigate incompatibility change
  • v2.0.0(September 30,2019)

    • Release Python Connector 2.0.0 for Arrow format change.
    • Fix SF_OCSP_RESPONSE_CACHE_DIR referring to the OCSP cache response file directory and not the top level of directory.
    • Fix Malformed certificate ID key causes uncaught KeyError.
    • No retry for certificate errors.
    • Fix In-Memory OCSP Response Cache - PythonConnector
    • Move AWS_ID and AWS_SECRET_KEY to their newer versions in the Python client
    • Fix result set downloader for ijson 2.5
    • Make authenticator field case insensitive earlier
    • Update USER-AGENT to be consistent with new format
    • Update Python Driver URL Whitelist to support US Gov domain
    • Fix memory leak in python connector panda df fetch API
  • v1.9.1(October 4,2019)

    • Add asn1crypto requirement to mitigate incompatibility change.
  • v1.9.0(August 26,2019) REMOVED from pypi due to dependency compatibility issues

    • Implement converter for all arrow data types in python connector extension
    • Fix arrow error when returning empty result using python connecter
    • Fix OCSP responder hang, AttributeError: ‘ReadTimeout’ object has no attribute ‘message’
    • Update OCSP Connection timeout.
    • Fix RevokedCertificateError OOB Telemetry events are not sent
    • Uncaught RevocationCheckError for FAIL_OPEN in create_pair_issuer_subject
    • Fix uncaught exception in generate_telemetry_data function
    • Fix connector looses context after connection drop/restore by retrying IncompleteRead error.
    • Make tzinfo class at the module level instead of inlining
  • v1.8.7(August 12,2019)

    • Rewrote validateDefaultParameters to validate the database, schema and warehouse at connection time. False by default.
    • Fix OCSP Server URL problem in multithreaded env
    • Fix Azure Gov PUT and GET issue
  • v1.8.6(July 29,2019)

    • Reduce retries for OCSP from Python Driver
    • Azure PUT issue: ValueError: I/O operation on closed file
    • Add client information to USER-AGENT HTTP header - PythonConnector
    • Better handling of OCSP cache download failure
  • v1.8.5(July 15,2019)

    • Drop Python 3.4 support for Python Connector
  • v1.8.4(July 01,2019)

    • Update Python Connector to discard invalid OCSP Responses while merging caches
  • v1.8.3(June 17,2019)

    • Update Client Driver OCSP Endpoint URL for Private Link Customers
    • Ignore session gone 390111 when closing
    • Python3.4 using requests 2.21.0 needs older version of urllib3
    • Use Account Name for Global URL
  • v1.8.2 (June 03,2019)

    • Pendulum datatype support
  • v1.8.1 (May 20,2019)

    • Revoked OCSP Responses persists in Driver Cache + Logging Fix
    • Fixed DeprecationWarning: Using or importing the ABCs from ‘collections’ instead of from ‘’ is deprecated
  • v1.8.0 (May 10, 2019)

    • support numpy.bool_ in binding type
    • Add Option to Skip Request Pooling
    • Add OCSP_MODE metric
    • Fixed PUT URI issue for Windows path
    • OCSP SoftFail
  • v1.7.11 (April 22, 2019)

    • numpy timestamp with timezone support
    • qmark not binding None
  • v1.7.10 (April 8, 2019)

    • Fix the incorrect custom Server URL in Python Driver for Privatelink
  • v1.7.9 (March 25,2019)

    • Python Interim Solution for Custom Cache Server URL
    • Internal change for pending feature
  • v1.7.8 (March 12,2019)

    • Add OCSP signing certificate validity check
  • v1.7.7 (February 22,2019)

    • Skip HEAD operation when OVERWRITE=true for PUT
    • Update copyright year from 2018 to 2019 for Python
  • v1.7.6 (February 08,2019)

    • Adjusted pyasn1 and pyasn1-module requirements for Python Connector
    • Added idna to made pyasn1 optional for Python2
  • v1.7.5 (January 25, 2019)

    • Incorporate “kwargs” style group of key-value pairs in connection’s “execute_string” function.
  • v1.7.4 (January 3, 2019)

    • Invalidate outdated OCSP response when checking cache hit
    • Made keyring use optional in Python Connector
    • Added SnowflakeNullConverter for Python Connector to skip all client side conversions
    • Honor CLIENT_PREFETCH_THREADS to download the result set.
    • Fixed the hang when region=us-west-2 is specified.
    • Added Python 3.7 tests
  • v1.7.3 (December 11, 2018)

    • Improved the progress bar control for SnowSQL
    • Fixed PUT/GET progress bar for Azure
  • v1.7.2 (December 4, 2018)

    • Refactored OCSP checks
    • Adjusted log level to mitigate confusions
  • v1.7.1 (November 27, 2018)

    • Fixed regex pattern warning in
    • Fixed 403 error for EU deployment
    • Fixed the epoch time to datetime object converter for Windoww
  • v1.7.0 (November 13, 2018)

    • Internal change for pending feature.
  • v1.6.12 (October 30, 2018)

    • Updated boto3 and botocore version dependeny.
    • Catch socket.EAI_NONAME for localhost socket and raise a better error message
    • Added client_session_keep_alive_heartbeat_frequency to control heartbeat timings for client_session_keep_alive.
  • v1.6.11 (October 23, 2018)

    • Fixed exit_on_error=true didn’t work if PUT / GET error occurs
    • Fixed a backslash followed by a quote in a literal was not taken into account.
    • Added request_guid to each HTTP request for tracing.
  • v1.6.10 (September 25, 2018)

    • Added client_session_keep_alive support.
    • Fixed multiline double quote expressions PR #117 (@bensowden)
    • Fixed binding datetime for TIMESTAMP type in qmark binding mode. PR #118 (@rhlahuja)
    • Retry HTTP 405 to mitigate Nginx bug.
    • Accept consent response for id token cache. WIP.
  • v1.6.9 (September 13, 2018)

    • Changed most INFO logs to DEBUG. Added INFO for key operations.
    • Fixed the URL query parser to get multiple values.
  • v1.6.8 (August 30, 2018)

    • Updated boto3 and botocore version dependeny.
  • v1.6.7 (August 22, 2018)

    • Enforce virtual host URL for PUT and GET.
    • Added retryCount, clientStarTime for query-request for better service.
  • v1.6.6 (August 9, 2018)

    • Replaced pycryptodome with pycryptodomex to avoid namespace conflict with PyCrypto.
    • Fixed hang if the connection is not explicitly closed since 1.6.4.
    • Reauthenticate for externalbrowser while running a query.
    • Fixed remove_comments option for SnowSQL.
  • v1.6.5 (July 13, 2018)

    • Fixed the current object cache in the connection for id token use.
    • Added no OCSP cache server use option.
  • v1.6.4 (July 5, 2018)

    • Fixed div by zero for Azure PUT command.
    • Cache id token for SSO. This feature is WIP.
    • Added telemetry client and job timings by @dsouzam.
  • v1.6.3 (June 14, 2018)

    • Fixed binding long value for Python 2.
  • v1.6.2 (June 7, 2018)

    • Removes username restriction for OAuth. PR 86(@tjj5036)
    • Retry OpenSSL.SysError in tests
    • Updated concurrent insert test as the server improved.
  • v1.6.1 (May 17, 2018)

    • Enable OCSP Dynamic Cache server for privatelink.
    • Ensure the type of login_timeout attribute is int.
  • v1.6.0 (May 3, 2018)

    • Enable OCSP Cache server by default.
  • v1.5.8 (April 26, 2018)

    • Fixed PUT command error ‘Server failed to authenticate the request. Make sure the value of Authorization header is formed correctly including the signature.’ for Azure deployment.
  • v1.5.7 (April 19, 2018)

    • Fixed object has no attribute errors in Python3 for Azure deployment.
    • Removed ContentEncoding=gzip from the header for PUT command. This caused COPY failure if autocompress=false.
  • v1.5.6 (April 5, 2018)

    • Updated boto3 and botocore version dependeny.
  • v1.5.5 (March 22, 2018)

    • Fixed TypeError: list indices must be integers or slices, not str. PR/Issue 75 (@daniel-sali).
    • Updated cryptography dependency.
  • v1.5.4 (March 15, 2018)

    • Tightened pyasn and pyasn1-modules version requirements
    • Added OS and OS_VERSION session info.
    • Relaxed pycryptodome version requirements. No 3.5.0 should be used.
  • v1.5.3 (March 9, 2018)

    • Pulled back pyasn1 for OCSP check in Python 2. Python 3 continue using asn1crypto for better performance.
    • Limit the upper bound of pycryptodome version to less than 3.5.0 for Issue 65.
  • v1.5.2 (March 1, 2018)

    • Fixed failue in case HOME/USERPROFILE is not set.
    • Updated boto3 and botocore version dependeny.
  • v1.5.1 (February 15, 2018)

    • Prototyped oauth. Won’t work without the server change.
    • Retry OCSP data parse failure
    • Fixed paramstyle=qmark binding for SQLAlchemy
  • v1.5.0 (January 26, 2018)

    • Removed pyasn1 and pyasn1-modules from the dependency.
    • Prototyped key pair authentication.
    • Fixed OCSP response cache expiration check.
  • v1.4.17 (January 19, 2018)

    • Adjusted pyasn1 and pyasn1-modules version dependency. PR 48 (@baxen)
    • Started replacing pyasn1 with asn1crypto Not activated yet.
  • v1.4.16 (January 16, 2018)

    • Added OCSP cache related tools.
  • v1.4.15 (January 11, 2018)

    • Added OCSP cache server option.
  • v1.4.14 (December 14, 2017)

    • Improved OCSP response dump util.
  • v1.4.13 (November 30, 2017)

    • Updated boto3 and botocore version dependeny.
  • v1.4.12 (November 16, 2017)

    • Added qmark and numeric paramstyle support for server side binding.
    • Added timezone session parameter support to connections.
    • Fixed a file handler leak in OCSP checks.
  • v1.4.11 (November 9, 2017)

    • Fixed Azure PUT command to use AES CBC key encryption.
    • Added retry for intermittent PyAsn1Error.
  • v1.4.10 (October 26, 2017)

    • Added Azure support for PUT and GET commands.
    • Updated cryptography, boto3 and botocore version dependeny.
  • v1.4.9 (October 10, 2017)

    • Fixed a regression caused by pyasn1 upgrade.
  • v1.4.8 (October 5, 2017)

    • Updated Fed/SSO parameters. The production version of Fed/SSO from Python Connector requires this version.
    • Refactored for Azure support
    • Set CLIENT_APP_ID and CLIENT_APP_VERSION in all requests
    • Support new behaviors of newer version of pyasn1. Relaxed the dependency.
    • Making socket timeout same as the login time
    • Fixed the case where no error message is attached.
  • v1.4.7 (September 20, 2017)

    • Refresh AWS token in PUT command if S3UploadFailedError includes the ExpiredToken error
    • Retry all of 5xx in connection
  • v1.4.6 (September 14, 2017)

    • Mitigated sigint handler config failure for SQLAlchemy
    • Improved the message for invalid SSL certificate error
    • Retry forever for query to mitigate 500 errors
  • v1.4.5 (August 31, 2017)

    • Fixed regression in #34 by rewriting SAML 2.0 compliant service application support.
    • Cleaned up logger by moving instance to module.
  • v1.4.4 (August 24, 2017)

    • Fixed Azure blob certificate issue. OCSP response structure bug fix
    • Added SAML 2.0 compliant service application support. preview feature.
    • Upgraded SSL wrapper with the latest urllib3 pyopenssl glue module. It uses kqueue, epoll or poll in replacement of select to read data from socket if available.
  • v1.4.3 (August 17, 2017)

    • Changed the log levels for some messages from ERROR to DEBUG to address confusion as real incidents. In fact, they are not real issues but signals for connection retry.
    • Added certifi to the dependent component list to mitigate CA root certificate out of date issue.
    • Set the maximum versions of dependent components boto3 and botocore.
    • Updated cryptography and pyOpenSSL version dependeny change.
    • Added a connection parameter validate_default_parameters to validate the default database, schema and warehouse. If the specified object doesn’t exist, it raises an error.
  • v1.4.2 (August 3, 2017)

    • Fixed retry HTTP 400 in upload file when AWS token expires
    • Relaxed the version of dependent components pyasn1 and pyasn1-modules
  • v1.4.1 (July 26, 2017)

    • Pinned pyasn1 and pyasn1-modules versions to 0.2.3 and 0.0.9, respectively
  • v1.4.0 (July 6, 2017)

    • Relaxed the versions of dependent components boto3, botocore, cffi and cryptography and pyOpenSSL
    • Minor improvements in OCSP response file cache
  • v1.3.18 (June 15, 2017)

    • Fixed OCSP response cache file not found issue on Windows. Drive letter was taken off
    • Use less restrictive cryptography>=1.7,<1.8
    • Added ORC detection in PUT command
  • v1.3.17 (June 1, 2017)

    • Timeout OCSP request in 60 seconds and retry
    • Set autocommit and abort_detached_query session parameters in authentication time if specified
    • Fixed cross region stage issue. Could not get files in us-west-2 region S3 bucket from us-east-1
  • v1.3.16 (April 20, 2017)

    • Fixed issue in fetching DATE causing [Error 22] Invalid argument on Windows
    • Retry on RuntimeError in requests
  • v1.3.15 (March 30, 2017)

    • Refactored data converters in fetch to improve performance
    • Fixed timestamp format FF to honor the scale of data type
    • Improved the security of OKTA authentication with hostname verifications
    • Retry PUT on the error OpenSSL.SSL.SysCallError 10053 with lower concurrency
    • Added raw_msg attribute to Error class
    • Refactored session managements
  • v1.3.14 (February 24, 2017)

    • Improved PUT and GET error handler.
    • Added proxy support to OCSP checks.
    • Use proxy parameters for PUT and GET commands.
    • Added sfqid and sqlstate to the results from query results.
    • Fixed the connection timeout calculation based on login_timeout and network_timeout.
    • Improved error messages in case of 403, 502 and 504 HTTP reponse code.
    • Upgraded cryptography to 1.7.2, boto3 to 1.4.4 and botocore to 1.5.14.
    • Removed explicit DNS lookup for OCSP URL.
  • v1.3.13 (February 9, 2017)

    • Fixed AWS SQS connection error with OCSP checks
    • Added login_timeout and network_timeout parameters to the Connection objects.
    • Fixed forbidden access error handing
  • v1.3.12 (February 2, 2017)

    • Fixed region parameter. One character was truncated from the tail of account name
    • Improved performance of fetching data by refactoring fetchone method
  • v1.3.11 (January 27, 2017)

    • Fixed the regression in 1.3.8 that caused intermittent 504 errors
  • v1.3.10 (January 26, 2017)

    • Compress data in HTTP requests at all times except empty data or OKTA request
    • Refactored FIXED, REAL and TIMESTAMP data fetch to improve performance. This mainly impacts SnowSQL
    • Added region option to support EU deployments better
    • Increased the retry counter for OCSP servers to mitigate intermittent failure
    • Refactored HTTP access retry logic
  • v1.3.9 (January 16, 2017)

    • Upgraded botocore to 1.4.93 to fix and boto3 to 1.4.3 to fix the HTTPS request failure in Python 3.6
    • Fixed python2 incomaptible import http.client
    • Retry OCSP validation in case of non-200 HTTP code returned
  • v1.3.8 (January 12, 2017)

    • Convert non-UTF-8 data in the large result set chunk to Unicode replacement characters to avoid decode error.
    • Updated copyright year to 2017.
    • Use six package to support both PY2 and PY3 for some functions
    • Upgraded cryptography to 1.7.1 to address MacOS Python 3.6 build issue.
    • Fixed OverflowError caused by invalid range of timetamp data for SnowSQL.
  • v1.3.7 (December 8, 2016)

    • Increased the validity date acceptance window to prevent OCSP returning invalid responses due to out-of-scope validity dates for certificates.
    • Enabled OCSP response cache file by default.
  • v1.3.6 (December 1, 2016)

    • Upgraded cryptography to 1.5.3, pyOpenSSL to 16.2.0 and cffi to 1.9.1.
  • v1.3.5 (November 17, 2016)

    • Fixed CA list cache race condition
    • Added retry intermittent 400 HTTP Bad Request error
  • v1.3.4 (November 3, 2016)

    • Added quoted_name data type support for binding by SQLAlchemy
    • Not to compress parquiet file in PUT command
  • v1.3.3 (October 20, 2016)

    • Downgraded botocore to 1.4.37 due to potential regression.
    • Increased the stability of PUT and GET commands
  • v1.3.2 (October 12, 2016)

    • Upgraded botocore to 1.4.52.
    • Set the signature version to v4 to AWS client. This impacts PUT, GET commands and fetching large result set.
  • v1.3.1 (September 30, 2016)

    • Added an account name including subdomain.
  • v1.3.0 (September 26, 2016)

    • Added support for the BINARY data type, which enables support for more Python data types:

      • Python 3:

        • bytes and bytearray can be used for binding.
        • bytes is also used for fetching BINARY data type.
      • Python 2:

        • bytearray can be used for binding
        • str is used for fetching BINARY data type.
    • Added proxy_user and proxy_password connection parameters for proxy servers that require authentication.

  • v1.2.8 (August 16, 2016)

    • Upgraded botocore to 1.4.37.
    • Added Connection.execute_string and Connection.execute_stream to run multiple statements in a string and stream.
    • Increased the stability of fetching data for Python 2.
    • Refactored memory usage in fetching large result set (Work in Progress).
  • v1.2.7 (July 31, 2016)

    • Fixed snowflake.cursor.rowcount for INSERT ALL.
    • Force OCSP cache invalidation after 24 hours for better security.
    • Use use_accelerate_endpoint in PUT and GET if Transfer acceleration is enabled for the S3 bucket.
    • Fixed the side effect of python-future that loads in the current directory.
  • v1.2.6 (July 13, 2016)

    • Fixed the AWS token renewal issue with PUT command when uploading uncompressed large files.
  • v1.2.5 (July 8, 2016)

    • Added retry for errors S3UploadFailedError and RetriesExceededError in PUT and GET, respectively.
  • v1.2.4 (July 6, 2016)

    • Added max_connection_pool parameter to Connection so that you can specify the maximum number of HTTP/HTTPS connections in the pool.
    • Minor enhancements for SnowSQL.
  • v1.2.3 (June 29, 2016)

    • Fixed 404 issue in GET command. An extra slash character changed the S3 path and failed to identify the file to download.
  • v1.2.2 (June 21, 2016)

    • Upgraded botocore to 1.4.26.
    • Added retry for 403 error when accessing S3.
  • v1.2.1 (June 13, 2016)

    • Improved fetch performance for data types (part 2): DATE, TIME, TIMESTAMP, TIMESTAMP_LTZ, TIMESTAMP_NTZ and TIMESTAMP_TZ.
  • v1.2.0 (June 10, 2016)

    • Improved fetch performance for data types (part 1): FIXED, REAL, STRING.
  • v1.1.5 (June 2, 2016)

    • Upgraded boto3 to 1.3.1 and botocore and 1.4.22.
    • Fixed snowflake.cursor.rowcount for DML by snowflake.cursor.executemany.
    • Added numpy data type binding support. numpy.intN, numpy.floatN and numpy.datetime64 can be bound and fetched.
  • v1.1.4 (May 21, 2016)

    • Upgraded cffi to 1.6.0.
    • Minor enhancements to SnowSQL.
  • v1.1.3 (May 5, 2016)

    • Upgraded cryptography to 1.3.2.
  • v1.1.2 (May 4, 2016)

    • Changed the dependency of tzlocal optional.
    • Fixed charmap error in OCSP checks.
  • v1.1.1 (Apr 11, 2016)

    • Fixed OCSP revocation check issue with the new certificate and AWS S3.
    • Upgraded cryptography to 1.3.1 and pyOpenSSL to 16.0.0.
  • v1.1.0 (Apr 4, 2016)

    • Added bzip2 support in PUT command. This feature requires a server upgrade.
    • Replaced the self contained packages in snowflake._vendor with the dependency of boto3 1.3.0 and botocore 1.4.2.
  • v1.0.7 (Mar 21, 2016)

    • Keep pyOpenSSL at 0.15.1.
  • v1.0.6 (Mar 15, 2016)

    • Upgraded cryptography to 1.2.3.
    • Added support for TIME data type, which is now a Snowflake supported data type. This feature requires a server upgrade.
    • Added snowflake.connector.DistCursor to fetch the results in dict instead of tuple.
    • Added compression to the SQL text and commands.
  • v1.0.5 (Mar 1, 2016)

    • Upgraded cryptography to 1.2.2 and cffi to 1.5.2.
    • Fixed the conversion from TIMESTAMP_LTZ to datetime in queries.
  • v1.0.4 (Feb 15, 2016)

    • Fixed the truncated parallel large result set.
    • Added retry OpenSSL low level errors ETIMEDOUT and ECONNRESET.
    • Time out all HTTPS requests so that the Python Connector can retry the job or recheck the status.
    • Fixed the location of encrypted data for PUT command. They used to be in the same directory as the source data files.
    • Added support for renewing the AWS token used in PUT commands if the token expires.
  • v1.0.3 (Jan 13, 2016)

    • Added support for the BOOLEAN data type (i.e. TRUE or FALSE). This changes the behavior of the binding for the bool type object:

      • Previously, bool was bound as a numeric value (i.e. 1 for True, 0 for False).
      • Now, bool is bound as native SQL data (i.e. TRUE or FALSE).
    • Added the autocommit method to the Connection object:

      • By default, autocommit mode is ON (i.e. each DML statement commits the change).
      • If autocommit mode is OFF, the commit and rollback methods are enabled.
    • Avoid segfault issue for cryptography 1.2 in Mac OSX by using 1.1 until resolved.

  • v1.0.2 (Dec 15, 2015)

    • Upgraded boto3 1.2.2, botocore 1.3.12.
    • Removed SSLv3 mapping from the initial table.
  • v1.0.1 (Dec 8, 2015)

    • Minor bug fixes.
  • v1.0.0 (Dec 1, 2015)

    • General Availability release.

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