iceberg::Not Class Reference

An Expression that represents logical NOT operation. More...

#include <expression.h>

Inheritance diagram for iceberg::Not:

Public Member Functions
const std::shared_ptr< Expression > &	child () const
	Returns the child expression.
Operation	op () const override
	Returns the operation for an expression node.
std::string	ToString () const override
	Get a user-readable string representation.
Result< std::shared_ptr< Expression > >	Negate () const override
	Returns the negation of this expression, equivalent to not(this).
bool	Equals (const Expression &other) const override
	Returns whether this expression will accept the same values as another.
Public Member Functions inherited from iceberg::Expression
virtual bool	is_unbound_predicate () const
virtual bool	is_bound_predicate () const
virtual bool	is_unbound_aggregate () const
virtual bool	is_bound_aggregate () const

Static Public Member Functions
static Result< std::unique_ptr< Not > >	Make (std::shared_ptr< Expression > child)
	Creates a Not expression from a child expression.
static Result< std::shared_ptr< Expression > >	MakeFolded (std::shared_ptr< Expression > child)
	Creates a folded Not expression from a child expression.

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.

Detailed Description

An Expression that represents logical NOT operation.

This expression negates its child expression.

Member Function Documentation

child()

const std::shared_ptr< Expression > & iceberg::Not::child ( ) const

inline

Returns the child expression.

Returns

The child expression being negated

Equals()

bool iceberg::Not::Equals ( const Expression &  other ) const

overridevirtual

Returns whether this expression will accept the same values as another.

Parameters

other

another expression

Returns

true if the expressions are equivalent

Reimplemented from iceberg::Expression.

Make()

Result< std::unique_ptr< Not > > iceberg::Not::Make ( std::shared_ptr< Expression >  child )

static

Creates a Not expression from a child expression.

Parameters

child

The expression to negate

Returns

A Result containing a unique pointer to Not, or an error if child is nullptr

MakeFolded()

Result< std::shared_ptr< Expression > > iceberg::Not::MakeFolded ( std::shared_ptr< Expression >  child )

static

Creates a folded Not expression from a child expression.

Parameters

child

The expression to negate

Returns

A Result containing a shared pointer to the folded Not expression, or an error if child is nullptr

Note

A folded Not expression is an expression that is equivalent to the original expression, but with the Not operation removed. For example, not(not(x)) = x.

Negate()

Result< std::shared_ptr< Expression > > iceberg::Not::Negate ( ) const

overridevirtual

Returns the negation of this expression, equivalent to not(this).

Reimplemented from iceberg::Expression.

op()

Operation iceberg::Not::op ( ) const

inlineoverridevirtual

Returns the operation for an expression node.

Implements iceberg::Expression.

ToString()

std::string iceberg::Not::ToString ( ) const

overridevirtual

Get a user-readable string representation.

Reimplemented from iceberg::Expression.

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

• iceberg/expression/expression.h
• iceberg/expression/expression.cc