Day transform that extracts the number of days from timestamp inputs since the epoch. More...

#include <transform_function.h>

Inheritance diagram for iceberg::DayTransform:

Public Member Functions
	DayTransform (std::shared_ptr< Type > const &source_type)

Result< Literal >	Transform (const Literal &literal) override
	Extract a date or timestamp day, as days from 1970-01-01.

std::shared_ptr< Type >	ResultType () const override
	Return the result type of a day transform.

Public Member Functions inherited from iceberg::TransformFunction
	TransformFunction (TransformType transform_type, std::shared_ptr< Type > source_type)

TransformType	transform_type () const
	Get the transform type.

const std::shared_ptr< Type > &	source_type () const
	Get the source type of transform function.

Static Public Member Functions
static Result< std::unique_ptr< TransformFunction > >	Make (std::shared_ptr< Type > const &source_type)
	Create a DayTransform.

Detailed Description

Day transform that extracts the number of days from timestamp inputs since the epoch.

Constructor & Destructor Documentation

◆ DayTransform()

iceberg::DayTransform::DayTransform ( std::shared_ptr< Type > const & source_type )

explicit

Parameters

source_type Must be a timestamp type.

Member Function Documentation

◆ Make()

Result< std::unique_ptr< TransformFunction > > iceberg::DayTransform::Make ( std::shared_ptr< Type > const & source_type )

static

Create a DayTransform.

Parameters

source_type Type of the input data.

Returns: A Result containing the DayTransform or an error.

◆ ResultType()

std::shared_ptr< Type > iceberg::DayTransform::ResultType ( ) const

overridevirtual

Return the result type of a day transform.

Note: The physical representation conforms to the Iceberg spec as DateType is internally converted to int. The DateType returned here provides a more human-readable way to display the partition field.

Implements iceberg::TransformFunction.

◆ Transform()

Result< Literal > iceberg::DayTransform::Transform ( const Literal & literal )

overridevirtual

Extract a date or timestamp day, as days from 1970-01-01.