#include <core/storage/sframe_data/groupby_aggregate_impl.hpp>

Public Member Functions
	groupby_element (std::vector< flexible_type > group_key, const std::vector< group_descriptor > &group_desc)

	groupby_element (const std::string &val, const std::vector< group_descriptor > &group_desc)

void	init (std::vector< flexible_type > group_key, const std::vector< group_descriptor > &group_desc)

void	save (oarchive &oarc) const
	Writes the group result into an output archive.

void	load (iarchive &iarc, const std::vector< group_descriptor > &group_desc)

bool	operator> (const groupby_element &other) const

bool	operator< (const groupby_element &other) const

bool	operator== (const groupby_element &other) const

void	operator+= (const groupby_element &other)

Public Attributes
std::vector< flexible_type >	key
	The key of this aggregation.

std::vector< std::unique_ptr< group_aggregate_value > >	values
	All the aggregated values.

size_t	hash_val
	A cache of the hash of the key.

Detailed Description

This class manages all the intermedate aggregation result of a given key. It contains a key, and an array of multiple aggregated values for that key (each aggregated value is for a different aggregator. For instance, one could be sum, one could be count). It then provides

Definition at line 53 of file groupby_aggregate_impl.hpp.

Constructor & Destructor Documentation

◆ groupby_element() [1/2]

turi::groupby_aggregate_impl::groupby_element::groupby_element	(	std::vector< flexible_type >	group_key,
		const std::vector< group_descriptor > &	group_desc
	)

Constructs a group element from a key, and a description of all the group operations. All the aggregated values will be initialized as new empty values.

◆ groupby_element() [2/2]

turi::groupby_aggregate_impl::groupby_element::groupby_element	(	const std::string &	val,
		const std::vector< group_descriptor > &	group_desc
	)

Constructs a groupby_element from a string which contains a serialization of the element. The array of all the descriptors is required.

Member Function Documentation

◆ init()

void turi::groupby_aggregate_impl::groupby_element::init	(	std::vector< flexible_type >	group_key,
		const std::vector< group_descriptor > &	group_desc
	)

Constructs a group element from a key, and a description of all the group operations. All the aggregated values will be initialized as new empty values.

◆ load()

void turi::groupby_aggregate_impl::groupby_element::load	(	iarchive &	iarc,
		const std::vector< group_descriptor > &	group_desc
	)

Loads the group result from an input archive and a group operation descriptor

◆ operator+=()

void turi::groupby_aggregate_impl::groupby_element::operator+= ( const groupby_element & other )

Combines values another groupby element which is performing the same set of operations

◆ operator<()

bool turi::groupby_aggregate_impl::groupby_element::operator< ( const groupby_element & other ) const

Provides a total ordering on group-by elements

◆ operator==()

bool turi::groupby_aggregate_impl::groupby_element::operator== ( const groupby_element & other ) const

Returns true if this, and other have identical keys

◆ operator>()

bool turi::groupby_aggregate_impl::groupby_element::operator> ( const groupby_element & other ) const