User-Defined Aggregate Functions¶

User-defined aggregate functions (UDAFs) in Snowpark. Refer to UDAFRegistration for details and sample code.

Classes

`UserDefinedAggregateFunction`(handler, name, ...)	Encapsulates a user defined aggregate function that is returned by `udaf()`, `UDAFRegistration.register()` or `UDAFRegistration.register_from_file()`.
`UDAFRegistration`(session)	Provides methods to register lambdas and functions as UDAFs in the Snowflake database.

Methods

`describe`(udaf_obj)	Returns a `DataFrame` that describes the properties of a UDAF.
`register`(handler[, return_type, ...])	Registers a Python function as a Snowflake Python UDAF and returns the UDAF.
`register_from_file`(file_path, handler_name)	Registers a Python class as a Snowflake Python UDAF from a Python or zip file, and returns the UDAF.

Attributes

`handler`	The Python class or a tuple containing the Python file path and the function name.
`name`	The UDAF name.