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This package includes the Snowflake SQLAlchemy, which supports Snowsql dialects for SQLAlchemy http://www.sqlalchemy.org/

Snowflake Documentation is available at: https://docs.snowflake.net/

Source code is also available at: https://github.com/snowflakedb/snowflake-sqlalchemy

Release Notes

  • v1.5.3(Unrelased)

    • Limit SQLAlchemy to < 2.0.0 before releasing version compatible with 2.0

  • v1.5.2(April 11, 2024)

    • Bump min SQLAlchemy to 1.4.19 for outer lateral join
    • Add support for sequence ordering in tests

  • v1.5.1(November 03, 2023)

    • Fixed a compatibility issue with Snowflake Behavioral Change 1057 on outer lateral join, for more details check https://docs.snowflake.com/en/release-notes/bcr-bundles/2023_04/bcr-1057.
    • Fixed credentials with externalbrowser authentication not caching due to incorrect parsing of boolean query parameters.
      • This fixes other boolean parameter passing to driver as well.

  • v1.5.0(Aug 23, 2023)

    • Added option to create a temporary stage command.
    • Added support for geometry type.
    • Fixed a compatibility issue of regex expression with SQLAlchemy 1.4.49.

  • v1.4.7(Mar 22, 2023)

    • Re-applied the application name of driver connection SnowflakeConnection to SnowflakeSQLAlchemy.
    • SnowflakeDialect.get_columns now throws a NoSuchTableError exception when the specified table doesn't exist, instead of the more vague KeyError.
    • Fixed a bug that dialect can not be created with empty host name.
    • Fixed a bug that sqlalchemy.func.now is not rendered correctly.

  • v1.4.6(Feb 8, 2023)

    • Bumped snowflake-connector-python dependency to newest version which supports Python 3.11.
    • Reverted the change of application name introduced in v1.4.5 until support gets added.

  • v1.4.5(Dec 7, 2022)

    • Updated the application name of driver connection SnowflakeConnection to SnowflakeSQLAlchemy.

  • v1.4.4(Nov 16, 2022)

    • Fixed a bug that percent signs in a non-compiled statement should not be interpolated with emtpy sequence when executed.

  • v1.4.3(Oct 17, 2022)

    • Fixed a bug that SnowflakeDialect.normalize_name and SnowflakeDialect.denormalize_name could not handle empty string.
    • Fixed a compatibility issue to vendor function sqlalchemy.engine.url._rfc_1738_quote as it is removed from SQLAlchemy v1.4.42.

  • v1.4.2(Sep 19, 2022)

    • Improved performance by standardizing string interpolations to f-strings.
    • Improved reliability by always using context managers.

  • v1.4.1(Aug 18, 2022)

    • snowflake-sqlalchemy is now SQLAlchemy 2.0 compatible.
    • Fixed a bug that DATE should not be removed from SnowflakeDialect.ischema_names.
    • Fixed breaking changes introduced in release 1.4.0 that:
      • changed the behavior of processing numeric, datetime and timestamp values returned from service.
      • changed the sequence order of primary/foreign keys in list returned by inspect.get_foreign_keys and inspect.get_pk_constraint.

  • v1.4.0(July 20, 2022)

    • Added support for regexp_match, regexp_replace in sqlalchemy.sql.expression.ColumnOperators.
    • Added support for Identity Column.
    • Added support for handling literals value of sql type Date, DateTime, Time, Float and Numeric, and converting the values into corresponding Python objects.
    • Added support for get_sequence_names in SnowflakeDialect.
    • Fixed a bug where insert with autoincrement failed due to incompatible column type affinity #124.
    • Fixed a bug when creating a column with sequence, default value was set incorrectly.
    • Fixed a bug that identifier having percents in a compiled statement was not interpolated.
    • Fixed a bug when visiting sequence value from another schema, the sequence name is not formatted with the schema name.
    • Fixed a bug where the sequence order of columns were not maintained when retrieving primary keys and foreign keys for a table.

  • v1.3.4(April 27,2022)

    • Fixed a bug where identifier max length was set to the wrong value and added relevant schema introspection
    • Add support for geography type
    • Fixed a bug where foreign key's referred schema was set incorrectly
    • Disabled new SQLAlchemy option for statement caching until support gets added

  • v1.3.3(December 19,2021)

    • Fixed an issue where quote arguments were stripped from identifiers.

  • v1.3.2 (September 14,2021)

    • Fixed a breaking change introduced in SQLAlchemy 1.4 that changed the behavior of returns_unicode_strings.

  • v1.3.1 (July 23,2021)

    • Raising minimum version of SQLAlchemy to match used features.

  • v1.2.5 (July 20,2021)

    • Various custom command bug fixes and additions.

  • v1.2.4 (October 05,2020)

    • Fixed an issue where inspector would not properly switch to table wide column retrieving when schema wide column retrieving was taking too long to respond.

  • v1.2.3 (March 30, 2020)

    • Update tox.ini
    • Add external stage to COPY INTO custom command.
    • Bumped pandas to newest versions

  • v1.2.2 (March 9, 2020)

    • Allow get_table_comment to fetch view comments too

  • v1.2.1 (February 18,2020)

    • Add driver property to SnowflakeDialect #140
    • Suppress deprecation warning by fixing import

  • v1.2.0 (January 27, 2020)

    • Fix typo in README Connection Parameters #141
    • Fix sqlalchemy and possibly python-connector warnings
    • Fix handling of empty table comments #137
    • Fix handling spaces in connection string passwords #149

  • v1.1.18 (January 6,2020)

    • Set current schema in connection string containing special characters
    • Calling str on custom_types throws Exception

  • v1.1.17 (December 2,2019)

    • Comments not created when creating new table #118
    • SQLAlchemy Column Metadata Cache not working
    • Timestamp DDL renders wrong when precision value passed
    • Fixed special character handling in snowflake-sqlalchemy from URL string
    • Added development optional dependencies to Python packages

  • v1.1.16 (October 21,2019)

    • Fix SQLAlchemy not working with global url

  • v1.1.15 (September 30, 2019)

    • Incorrect SQL generated for INSERT with CTE
    • Type Synonyms not exported to top-level module #109

  • v1.1.14 (August 12, 2019)

    • Fix CSVFormatter class has FIELD_DELIMETER spelled incorrectly

  • v1.1.13 (May 20,2019)

    • CopyInto's maxfilesize method expects a bool instead of an int
    • CopyInto statement doesn't compile correctly when the source is storage and the destination is a table

  • v1.1.12 (April 8,2019)

    • Add ability to inspect column comments
    • Restricting index creation checking to only SnowflakeDialect tables

  • v1.1.11 (March 25, 2019)

    • Remove relative reference to connector from SQLAlchemy dialect

  • v1.1.10 (February 22, 2019)

    • Separated base.py file into smaller files and fixed import statements
    • Prevent creating tables with indexes in SQLAlchemy
    • Add tox support

  • v1.1.9 (February 11, 2019)

    • Fix an issue in v1.1.8

  • v1.1.8 (February 8, 2019)

    • Fixed a dependency

  • v1.1.7 (February 8, 2019)

    • Added Upsert in sql-alchemy
    • CopyIntoS3 command in SQLAlchemy

  • v1.1.6 (January 3, 2019)

    • Fixed 'module' object is not callable in csvsql

  • v1.1.5 (December 19, 2018)

    • Added multivalue_support feature flag
    • Deprecate get_primary_keys

  • v1.1.4 (November 13, 2018)

    • Fixed lable/alias by honoring quote_name.

  • v1.1.3 (October 30, 2018)

    • SQLAlchemy 1.2 multi table support.
    • TIMESTAMP_LTZ, TIMESTAMP_NTZ and TIMESTAMP_TZ support.
    • Fixed relative import issue in SQLAlchemy

  • v1.1.2 (June 7, 2018)

    • Removes username restriction for OAuth

  • v1.1.1 (May 17, 2018)

    • Made password as optional parameter for SSO support
    • Fixed paramstyl=qmark mode where the data are bound in the server instead of client side
    • Fixed multipart schema support. Now db.schema can be specified in the schema parameters.
    • Added region parameter support to URL utility method.

  • v1.1.0 (February 1, 2018)

    • Updated doc including role example.
    • Fixed the return value of get_pk_constraint and get_primary_keys. Those applications that depend on the old behaviors must update codes. Issue #38 (@nrth)
    • Updated doc including a note about open and close connections.

  • v1.0.9 (January 4, 2018)

    • Fixed foreign key names that should be normalized. Issue #24 (@cladden)
    • Set the default schema Issue #25 (@cladden)
    • Improved performance by caching current database and schema for inspector. Issue #30 (@cladden)

  • v1.0.8 (December 21, 2017)

    • Added get_schema_names method to Snowflake SQLAlchemy dialect. PR #20(andrewsali)
    • Fixed the column metadata including length for string/varchar and precision and scale for numeric data type. Issue #22(@cladden)

  • v1.0.7 (May 18, 2017)

    • Fixed COPY command transaction issue. PR #16(Pangstar) and Issue #17(Pangstar)

  • v1.0.6 (April 20, 2017)

    • Fixed account with subdomain issue. Issue #15(Pangstar)

  • v1.0.5 (April 13, 2017)

    • Added snowflake_clusterby option support to Table object so that the user can create a table with clustering keys

  • v1.0.4 (March 9, 2017)

    • Added SQLAlchemy 1.1 support

  • v1.0.3 (October 20, 2016)

    • Added VARIANT, OBJECT and ARRAY data type supports for fetch

  • v1.0.2 (July 5, 2016)

    • Fixed the development status in classifiers. 5 - Production/Stable

  • v1.0.1 (July 4, 2016)

    • Fixed URL method in case of including warehouse without database.

  • v1.0.0 (June 28, 2016)

    • General Availability