airflow.providers.snowflake.hooks.snowflake¶

Attributes¶

T

Classes¶

SnowflakeHook

A client to interact with Snowflake.

Module Contents¶

airflow.providers.snowflake.hooks.snowflake.T[source]¶

class airflow.providers.snowflake.hooks.snowflake.SnowflakeHook(*args, **kwargs)[source]¶

Bases: airflow.providers.common.sql.hooks.sql.DbApiHook

A client to interact with Snowflake.

This hook requires the snowflake_conn_id connection. The snowflake account, login, and, password field must be setup in the connection. Other inputs can be defined in the connection or hook instantiation.

Parameters:

snowflake_conn_id – Reference to Snowflake connection id
account – snowflake account name
authenticator – authenticator for Snowflake. ‘snowflake’ (default) to use the internal Snowflake authenticator ‘externalbrowser’ to authenticate using your web browser and Okta, ADFS or any other SAML 2.0-compliant identify provider (IdP) that has been defined for your account https://<your_okta_account_name>.okta.com to authenticate through native Okta.
warehouse – name of snowflake warehouse
database – name of snowflake database
region – name of snowflake region
role – name of snowflake role
schema – name of snowflake schema
session_parameters – You can set session-level parameters at the time you connect to Snowflake
insecure_mode – Turns off OCSP certificate checks. For details, see: How To: Turn Off OCSP Checking in Snowflake Client Drivers - Snowflake Community

Note

get_sqlalchemy_engine() depends on snowflake-sqlalchemy

conn_name_attr = 'snowflake_conn_id'[source]¶

default_conn_name = 'snowflake_default'[source]¶

conn_type = 'snowflake'[source]¶

hook_name = 'Snowflake'[source]¶

supports_autocommit = True[source]¶

classmethod get_connection_form_widgets()[source]¶

Return connection widgets to add to connection form.

classmethod get_ui_field_behaviour()[source]¶

Return custom field behaviour.

account[source]¶

warehouse[source]¶

database[source]¶

region[source]¶

role[source]¶

schema[source]¶

authenticator[source]¶

session_parameters[source]¶

client_request_mfa_token[source]¶

client_store_temporary_credential[source]¶

query_ids: list[str] = [][source]¶

get_uri()[source]¶

Override DbApiHook get_uri method for get_sqlalchemy_engine().

get_conn()[source]¶

Return a snowflake.connection object.

get_sqlalchemy_engine(engine_kwargs=None)[source]¶

Get an sqlalchemy_engine object.

Parameters:: engine_kwargs – Kwargs used in create_engine().
Returns:: the created engine.

get_snowpark_session()[source]¶

Get a Snowpark session object.

Returns:: the created session.

set_autocommit(conn, autocommit)[source]¶

Set the autocommit flag on the connection.

get_autocommit(conn)[source]¶

Get autocommit setting for the provided connection.

Parameters:: conn – Connection to get autocommit setting from.
Returns:: connection autocommit setting. True if autocommit is set to True on the connection. False if it is either not set, set to False, or the connection does not support auto-commit.

run(sql: str | collections.abc.Iterable[str], autocommit: bool = ..., parameters: collections.abc.Iterable | collections.abc.Mapping[str, Any] | None = ..., handler: None = ..., split_statements: bool = ..., return_last: bool = ..., return_dictionaries: bool = ...) → None[source]¶

run(sql: str | collections.abc.Iterable[str], autocommit: bool = ..., parameters: collections.abc.Iterable | collections.abc.Mapping[str, Any] | None = ..., handler: Callable[[Any], T] = ..., split_statements: bool = ..., return_last: bool = ..., return_dictionaries: bool = ...) → tuple | list[tuple] | list[list[tuple] | tuple] | None

Run a command or list of commands.

Pass a list of SQL statements to the SQL parameter to get them to execute sequentially. The result of the queries is returned if the handler callable is set.

Parameters:

sql – The SQL string to be executed with possibly multiple statements, or a list of sql statements to execute
autocommit – What to set the connection’s autocommit setting to before executing the query.
parameters – The parameters to render the SQL query with.
handler – The result handler which is called with the result of each statement.
split_statements – Whether to split a single SQL string into statements and run separately
return_last – Whether to return result for only last statement or for all after split.
return_dictionaries – Whether to return dictionaries rather than regular DBAPI sequences as rows in the result. The dictionaries are of form { 'column1_name': value1, 'column2_name': value2 ... }.

Returns:

Result of the last SQL statement if handler is set. None otherwise.

get_openlineage_database_info(connection)[source]¶

Return database specific information needed to generate and parse lineage metadata.

This includes information helpful for constructing information schema query and creating correct namespace.

Parameters:: connection – Airflow connection to reduce calls of get_connection method

get_openlineage_database_dialect(_)[source]¶

Return database dialect used for SQL parsing.

For a list of supported dialects check: https://openlineage.io/docs/development/sql#sql-dialects

get_openlineage_default_schema()[source]¶

Return default schema specific to database.