iceberg::BoundAggregate Class Reference

Base class for bound aggregates. More...

#include <aggregate.h>

Inheritance diagram for iceberg::BoundAggregate:

Classes
class	Aggregator
	Base class for aggregators. More...

Public Member Functions
std::shared_ptr< BoundReference >	reference () override
	Returns the underlying bound reference for this term.
Result< Literal >	Evaluate (const StructLike &data) const override=0
	Evaluate this expression against a row-based data.
virtual Result< Literal >	Evaluate (const DataFile &file) const =0
virtual bool	HasValue (const DataFile &file) const =0
	Whether metrics in the data file are sufficient to evaluate.
bool	is_bound_aggregate () const override
virtual std::unique_ptr< Aggregator >	NewAggregator () const =0
	Create a new aggregator for this aggregate.
Public Member Functions inherited from iceberg::Aggregate< BoundTerm >
Expression::Operation	op () const override
	Returns the operation for an expression node.
const std::shared_ptr< T > &	term () const
std::string	ToString () const override
	Get a user-readable string representation.
Public Member Functions inherited from iceberg::Expression
virtual Result< std::shared_ptr< Expression > >	Negate () const
	Returns the negation of this expression, equivalent to not(this).
virtual bool	Equals (const Expression &other) const
	Returns whether this expression will accept the same values as another.
std::string	ToString () const override
	Get a user-readable string representation.
virtual bool	is_unbound_predicate () const
virtual bool	is_bound_predicate () const
virtual bool	is_unbound_aggregate () const

Protected Member Functions
	BoundAggregate (Expression::Operation op, std::shared_ptr< BoundTerm > term)
Protected Member Functions inherited from iceberg::Aggregate< BoundTerm >
	Aggregate (Expression::Operation op, std::shared_ptr< T > term)

Additional Inherited Members
Public Types inherited from iceberg::Expression
enum class	Operation {   kTrue , kFalse , kIsNull , kNotNull ,   kIsNan , kNotNan , kLt , kLtEq ,   kGt , kGtEq , kEq , kNotEq ,   kIn , kNotIn , kNot , kAnd ,   kOr , kStartsWith , kNotStartsWith , kCount ,   kCountNull , kCountStar , kMax , kMin }
	Operation types for expressions.
Static Protected Member Functions inherited from iceberg::Aggregate< BoundTerm >
static constexpr bool	IsSupportedOp (Expression::Operation op)
Protected Attributes inherited from iceberg::Aggregate< BoundTerm >
Expression::Operation	operation_
std::shared_ptr< T >	term_

Detailed Description

Base class for bound aggregates.

Member Function Documentation

Evaluate()

Result< Literal > iceberg::BoundAggregate::Evaluate ( const StructLike &  data ) const

overridepure virtual

Evaluate this expression against a row-based data.

Implements iceberg::Bound.

Implemented in iceberg::CountAggregate, iceberg::MaxAggregate, and iceberg::MinAggregate.

HasValue()

virtual bool iceberg::BoundAggregate::HasValue ( const DataFile &  file ) const

pure virtual

Whether metrics in the data file are sufficient to evaluate.

Implemented in iceberg::CountNonNullAggregate, iceberg::CountNullAggregate, iceberg::CountStarAggregate, iceberg::MaxAggregate, and iceberg::MinAggregate.

is_bound_aggregate()

bool iceberg::BoundAggregate::is_bound_aggregate ( ) const

inlineoverridevirtual

Reimplemented from iceberg::Expression.

NewAggregator()

virtual std::unique_ptr< Aggregator > iceberg::BoundAggregate::NewAggregator ( ) const

pure virtual

Create a new aggregator for this aggregate.

Note

The returned aggregator cannot outlive the BoundAggregate that creates it.

Implemented in iceberg::CountAggregate, iceberg::MaxAggregate, and iceberg::MinAggregate.

reference()

std::shared_ptr< BoundReference > iceberg::BoundAggregate::reference ( )

inlineoverridevirtual

Returns the underlying bound reference for this term.

Implements iceberg::Bound.

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The documentation for this class was generated from the following file:

• iceberg/expression/aggregate.h