org.apache.calcite.rex

Class RexAnalyzer

java.lang.Object

org.apache.calcite.rex.RexAnalyzer

public class RexAnalyzer
extends Object

Analyzes an expression, figures out what are the unbound variables, assigns a variety of values to each unbound variable, and evaluates the expression.

Field Summary

Fields

Modifier and Type	Field and Description
RexNode	e
int	unsupportedCount
List<RexNode>	variables

Constructor Summary

Constructors

Constructor and Description
RexAnalyzer(RexNode e, RelOptPredicateList predicates) Creates a RexAnalyzer.

Method Summary

Modifier and Type	Method and Description
Iterable<Map<RexNode,Comparable>>	assignments() Generates a map of variables and lists of values that could be assigned to them.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

e

public final RexNode e

variables

public final List<RexNode> variables

unsupportedCount

public final int unsupportedCount

Constructor Detail

RexAnalyzer

public RexAnalyzer(RexNode e,
                   RelOptPredicateList predicates)

Creates a RexAnalyzer.

Method Detail

assignments

public Iterable<Map<RexNode,Comparable>> assignments()

Generates a map of variables and lists of values that could be assigned to them.