Package org.apache.iceberg.expressions

Interface Expression

All Superinterfaces:

Serializable

All Known Implementing Classes:

Aggregate, And, BoundAggregate, BoundLiteralPredicate, BoundPredicate, BoundSetPredicate, BoundUnaryPredicate, CountAggregate, CountNonNull, CountStar, False, MaxAggregate, MinAggregate, Not, Or, Predicate, True, UnboundAggregate, UnboundPredicate

public interface Expression
extends Serializable

Represents a boolean expression tree.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static enum	Expression.Operation

Method Summary

Modifier and Type	Method	Description
default boolean	isEquivalentTo(Expression other)	Returns whether this expression will accept the same values as another.
default Expression	negate()	Returns the negation of this expression, equivalent to not(this).
Expression.Operation	op()	Returns the operation for an expression node.

Method Details

op

Expression.Operation op()

Returns the operation for an expression node.

negate

default Expression negate()

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

isEquivalentTo

default boolean isEquivalentTo(Expression other)

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

If this returns true, the expressions are guaranteed to return the same evaluation for the same input. However, if this returns false the expressions may return the same evaluation for the same input. That is, expressions may be equivalent even if this returns false.

For best results, rewrite not and bind expressions before calling this method.

Parameters:

other - another expression

Returns:

true if the expressions are equivalent