org.eigenbase.rel.rules
Interface PushProjector.ExprCondition

All Known Implementing Classes:

PushProjector.OperatorExprCondition

Enclosing class:

PushProjector

public static interface PushProjector.ExprCondition

A functor that replies true or false for a given expression.

See Also:

PushProjector.OperatorExprCondition

Field Summary

static PushProjector.ExprCondition

FALSE Constant condition that replies false for all expressions.

Method Summary

boolean

test(RexNode expr) Evaluates a condition for a given expression.

Field Detail

FALSE

static final PushProjector.ExprCondition FALSE

Constant condition that replies false for all expressions.

Method Detail

test

boolean test(RexNode expr)

Evaluates a condition for a given expression.

Parameters:

expr - Expression

Returns:

result of evaluating the condition