snowflake.snowpark.Session¶

class snowflake.snowpark.Session(conn: Union[ServerConnection, MockServerConnection, NopConnection], options: Optional[Dict[str, Any]] = None)[source]¶

Bases: object

Establishes a connection with a Snowflake database and provides methods for creating DataFrames and accessing objects for working with files in stages.

When you create a Session object, you provide connection parameters to establish a connection with a Snowflake database (e.g. an account, a user name, etc.). You can specify these settings in a dict that associates connection parameters names with values. The Snowpark library uses the Snowflake Connector for Python to connect to Snowflake. Refer to Connecting to Snowflake using the Python Connector for the details of Connection Parameters.

To create a Session object from a dict of connection parameters:

>>> connection_parameters = {
...     "user": "<user_name>",
...     "password": "<password>",
...     "account": "<account_name>",
...     "role": "<role_name>",
...     "warehouse": "<warehouse_name>",
...     "database": "<database_name>",
...     "schema": "<schema_name>",
... }
>>> session = Session.builder.configs(connection_parameters).create() 

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To create a Session object from an existing Python Connector connection:

>>> session = Session.builder.configs({"connection": <your python connector connection>}).create() 

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Session contains functions to construct a DataFrame like table(), sql() and read, etc.

A Session object is not thread-safe.

Methods

`add_import`(path[, import_path, chunk_size, ...])	Registers a remote file in stage or a local file as an import of a user-defined function (UDF).
`add_packages`(*packages)	Adds third-party packages as dependencies of a user-defined function (UDF).
`add_requirements`(file_path)	Adds a requirement file that contains a list of packages as dependencies of a user-defined function (UDF).
`append_query_tag`(tag[, separator])	Appends a tag to the current query tag.
`ast_listener`([include_error])	Creates an instance of `AstListener` as a context manager to capture ast batches flushed.
`call`(sproc_name, *args[, statement_params, ...])	Calls a stored procedure by name.
`cancel_all`()	Cancel all action methods that are running currently.
`clear_imports`()	Clears all files in a stage or local files from the imports of a user-defined function (UDF).
`clear_packages`()	Clears all third-party packages of a user-defined function (UDF).
`close`()	Close this session.
`createDataFrame`(data[, schema])	Creates a new DataFrame containing the specified values from the local data.
`create_async_job`(query_id)	Creates an `AsyncJob` from a query ID.
`create_dataframe`(data[, schema])	Creates a new DataFrame containing the specified values from the local data.
`flatten`(input[, path, outer, recursive, mode])	Creates a new `DataFrame` by flattening compound values into multiple rows.
`generator`(*columns[, rowcount, timelimit])	Creates a new DataFrame using the Generator table function.
`getActiveSession`()	Gets the active session if one is created.
`get_active_session`()	Gets the active session if one is created.
`get_current_account`()	Returns the name of the current account for the Python connector session attached to this session.
`get_current_database`()	Returns the name of the current database for the Python connector session attached to this session.
`get_current_role`()	Returns the name of the primary role in use for the current session.
`get_current_schema`()	Returns the name of the current schema for the Python connector session attached to this session.
`get_current_user`()	Returns the name of the user in the connection to Snowflake attached to this session.
`get_current_warehouse`()	Returns the name of the warehouse in use for the current session.
`get_fully_qualified_current_schema`()	Returns the fully qualified name of the current schema for the session.
`get_fully_qualified_name_if_possible`(name)	Returns the fully qualified object name if current database/schema exists, otherwise returns the object name
`get_imports`()	Returns a list of imports added for user defined functions (UDFs).
`get_packages`()	Returns a `dict` of packages added for user-defined functions (UDFs).
`get_session_stage`([statement_params])	Returns the name of the temporary stage created by the Snowpark library for uploading and storing temporary artifacts for this session.
`is_feature_enabled_for_version`(parameter_name)	This method checks if a feature is enabled for the current session based on the server side parameter.
`query_history`([include_describe, ...])	Create an instance of `QueryHistory` as a context manager to record queries that are pushed down to the Snowflake database.
`range`(start[, end, step])	Creates a new DataFrame from a range of numbers.
`remove_import`(path)	Removes a file in stage or local file from the imports of a user-defined function (UDF).
`remove_package`(package)	Removes a third-party package from the dependency list of a user-defined function (UDF).
`replicate_local_environment`([...])	Adds all third-party packages in your local environment as dependencies of a user-defined function (UDF).
`sql`(query[, params])	Returns a new DataFrame representing the results of a SQL query.
`table`(name)	Returns a Table that points the specified table.
`table_function`(func_name, *func_arguments, ...)	Creates a new DataFrame from the given snowflake SQL table function.
`update_query_tag`(tag)	Updates a query tag that is a json encoded string.
`use_database`(database)	Specifies the active/current database for the session.
`use_role`(role)	Specifies the active/current primary role for the session.
`use_schema`(schema)	Specifies the active/current schema for the session.
`use_secondary_roles`(roles)	Specifies the active/current secondary roles for the session.
`use_warehouse`(warehouse)	Specifies the active/current warehouse for the session.
`write_pandas`(df, table_name, *[, database, ...])	Writes a pandas DataFrame to a table in Snowflake and returns a Snowpark `DataFrame` object referring to the table where the pandas DataFrame was written to.

Attributes

`ast_enabled`
`auto_clean_up_temp_table_enabled`	When setting this parameter to `True`, Snowpark will automatically clean up temporary tables created by `DataFrame.cache_result()` in the current session when the DataFrame is no longer referenced (i.e., gets garbage collected).
`builder`	Returns a builder you can use to set configuration properties and create a `Session` object.
`conf`
`connection`	Returns a `SnowflakeConnection` object that allows you to access the connection between the current session and Snowflake server.
`cte_optimization_enabled`	Set to `True` to enable the CTE optimization (defaults to `False`).
`custom_package_usage_config`	Get or set configuration parameters related to usage of custom Python packages in Snowflake.
`eliminate_numeric_sql_value_cast_enabled`
`file`	Returns a `FileOperation` object that you can use to perform file operations on stages.
`large_query_breakdown_complexity_bounds`
`large_query_breakdown_enabled`
`lineage`	Returns a `Lineage` object that you can use to explore lineage of snowflake entities.
`query_tag`	The query tag for this session.
`read`	Returns a `DataFrameReader` that you can use to read data from various supported sources (e.g.
`reduce_describe_query_enabled`	When setting this parameter to `True`, Snowpark will infer the schema of DataFrame locally if possible, instead of issuing an internal describe query to get the schema from the Snowflake server.
`session_id`	Returns an integer that represents the session ID of this session.
`sproc`	Returns a `stored_procedure.StoredProcedureRegistration` object that you can use to register stored procedures.
`sql_simplifier_enabled`	Set to `True` to use the SQL simplifier (defaults to `True`).
`stored_procedure_profiler`	Returns a `stored_procedure_profiler.StoredProcedureProfiler` object that you can use to profile stored procedures.
`telemetry_enabled`	Controls whether or not the Snowpark client sends usage telemetry to Snowflake.
`udaf`	Returns a `udaf.UDAFRegistration` object that you can use to register UDAFs.
`udf`	Returns a `udf.UDFRegistration` object that you can use to register UDFs.
`udtf`	Returns a `udtf.UDTFRegistration` object that you can use to register UDTFs.