Remove deprecated S3ToSnowflake and SnowflakeToSlack operators (#33558)

* Remove deprecated `S3ToSnowflake` and `SnowflakeToSlack` operators

* Update relevant docs and add breaking changes

Author: Taragolis

airflow/providers/snowflake/CHANGELOG.rst

@@ -27,6 +27,21 @@
 Changelog
 ---------
 
+5.0.0
+.....
+
+Breaking changes
+~~~~~~~~~~~~~~~~
+
+.. warning::
+  Removed deprecated ``S3ToSnowflakeOperator`` in favor of ``CopyFromExternalStageToSnowflakeOperator``.
+  The parameter that was passed as ``s3_keys`` needs to be changed to ``files``, and the behavior should stay the same.
+
+  Removed deprecated ``SnowflakeToSlackOperator`` in favor of ``SqlToSlackOperator`` from Slack Provider.
+  Parameters that were passed as ``schema``, ``role``, ``database``, ``warehouse`` need to be included into
+  ``sql_hook_params`` parameter, and the behavior should stay the same.
+
+
 4.4.2
 .....
 

airflow/providers/snowflake/provider.yaml

@@ -84,17 +84,10 @@ hooks:
       - airflow.providers.snowflake.hooks.snowflake_sql_api
 
 transfers:
-  - source-integration-name: Amazon Simple Storage Service (S3)
-    target-integration-name: Snowflake
-    python-module: airflow.providers.snowflake.transfers.s3_to_snowflake
-    how-to-guide: /docs/apache-airflow-providers-snowflake/operators/s3_to_snowflake.rst
-  - source-integration-name: Snowflake
-    target-integration-name: Slack
-    python-module: airflow.providers.snowflake.transfers.snowflake_to_slack
-    how-to-guide: /docs/apache-airflow-providers-snowflake/operators/snowflake_to_slack.rst
   - source-integration-name: Amazon Simple Storage Service (S3)
     target-integration-name: Snowflake
     python-module: airflow.providers.snowflake.transfers.copy_into_snowflake
+    how-to-guide: /docs/apache-airflow-providers-snowflake/operators/copy_into_snowflake.rst
   - source-integration-name: Google Cloud Storage (GCS)
     target-integration-name: Snowflake
     python-module: airflow.providers.snowflake.transfers.copy_into_snowflake

airflow/providers/snowflake/transfers/s3_to_snowflake.py

@@ -17,29 +17,34 @@
 
 .. _howto/operator:S3ToSnowflakeOperator:
 
-S3ToSnowflakeOperator
-=====================
+CopyFromExternalStageToSnowflakeOperator
+========================================
 
-Use the :class:`S3ToSnowflakeOperator <airflow.providers.snowflake.transfers.s3_to_snowflake>` to load data stored in `AWS S3 <https://aws.amazon.com/s3/>`__
-to a Snowflake table.
+Use the :class:`CopyFromExternalStageToSnowflakeOperator <airflow.providers.snowflake.transfers.copy_into_snowflake>`
+to load data stored in `AWS S3 <https://aws.amazon.com/s3/>`__,
+`Google Cloud Storage <https://cloud.google.com/storage>`__, or
+`Azure Blob Storage <https://azure.microsoft.com/products/storage/blobs>`__ to a Snowflake table.
 
+.. note:: This operator is a simple wrapper in top of
+    `COPY INTO table <https://docs.snowflake.com/en/sql-reference/sql/copy-into-table#>`__ query, and
+    required `creating stage <https://docs.snowflake.com/en/sql-reference/sql/create-stage>`__ first.
 
 Using the Operator
 ^^^^^^^^^^^^^^^^^^
 
 Similarly to the :class:`SnowflakeOperator <airflow.providers.snowflake.operators.snowflake>`, use the ``snowflake_conn_id`` and
 the additional relevant parameters to establish connection with your Snowflake instance.
 This operator will allow loading of one or more named files from a specific Snowflake stage (predefined S3 path). In order to do so
-pass the relevant file names to the ``s3_keys`` parameter and the relevant Snowflake stage to the ``stage`` parameter.
+pass the relevant file names to the ``files`` parameter and the relevant Snowflake stage to the ``stage`` parameter.
 ``pattern`` can be used to specify the file names and/or paths match patterns
 (see `docs <https://docs.snowflake.com/en/sql-reference/sql/copy-into-table.html#loading-using-pattern-matching>`__).
 ``file_format`` can be used to either reference an already existing Snowflake file format or a custom string that defines
 a file format (see `docs <https://docs.snowflake.com/en/sql-reference/sql/create-file-format.html>`__).
 
-An example usage of the S3ToSnowflakeOperator is as follows:
+An example usage of the CopyFromExternalStageToSnowflakeOperator is as follows:
 
-.. exampleinclude:: /../../tests/system/providers/snowflake/example_s3_to_snowflake.py
+.. exampleinclude:: /../../tests/system/providers/snowflake/example_copy_into_snowflake.py
     :language: python
-    :start-after: [START howto_operator_s3_to_snowflake]
-    :end-before: [END howto_operator_s3_to_snowflake]
+    :start-after: [START howto_operator_s3_copy_into_snowflake]
+    :end-before: [END howto_operator_s3_copy_into_snowflake]
     :dedent: 4