iceberg::Expression Class Reference

Represents a boolean expression tree. More...

#include <expression.h>

Inheritance diagram for iceberg::Expression:

Public Types
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.

Public Member Functions
virtual Operation	op () const =0
	Returns the operation for an expression node.
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
virtual bool	is_bound_aggregate () const

Detailed Description

Represents a boolean expression tree.

Member Function Documentation

Equals()

virtual bool iceberg::Expression::Equals ( const Expression &  other ) const

inlinevirtual

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

Parameters

other

another expression

Returns

true if the expressions are equivalent

Reimplemented in iceberg::True, iceberg::False, iceberg::And, iceberg::Or, iceberg::Not, iceberg::BoundUnaryPredicate, iceberg::BoundLiteralPredicate, and iceberg::BoundSetPredicate.

Negate()

virtual Result< std::shared_ptr< Expression > > iceberg::Expression::Negate ( ) const

inlinevirtual

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

Reimplemented in iceberg::True, iceberg::False, iceberg::And, iceberg::Or, iceberg::Not, iceberg::UnboundPredicateImpl< B >, iceberg::BoundUnaryPredicate, iceberg::BoundLiteralPredicate, iceberg::BoundSetPredicate, and iceberg::UnboundPredicate.

op()

virtual Operation iceberg::Expression::op ( ) const

pure virtual

Returns the operation for an expression node.

Implemented in iceberg::Aggregate< T >, iceberg::Aggregate< BoundTerm >, iceberg::Aggregate< UnboundTerm< B > >, iceberg::True, iceberg::False, iceberg::And, iceberg::Or, iceberg::Not, iceberg::Predicate< T >, iceberg::Predicate< BoundTerm >, and iceberg::Predicate< UnboundTerm< B > >.

ToString()

std::string iceberg::Expression::ToString ( ) const

inlineoverridevirtual

Get a user-readable string representation.

Implements iceberg::util::Formattable.

Reimplemented in iceberg::True, iceberg::False, iceberg::Or, iceberg::Not, and iceberg::UnboundPredicateImpl< B >.

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

• iceberg/expression/expression.h