org.apache.calcite.rel.rules

Class JoinPushTransitivePredicatesRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.calcite.rel.rules.JoinPushTransitivePredicatesRule

public class JoinPushTransitivePredicatesRule
extends RelOptRule

Planner rule that infers predicates from on a Join and creates Filters if those predicates can be pushed to its inputs.

Uses RelMdPredicates to infer the predicates, returns them in a RelOptPredicateList and applies them appropriately.

Field Summary

Fields

Modifier and Type	Field and Description
static JoinPushTransitivePredicatesRule	INSTANCE The singleton.

Fields inherited from class org.apache.calcite.plan.RelOptRule

description, operands

Constructor Summary

Constructors

Constructor and Description
JoinPushTransitivePredicatesRule(Class<? extends Join> clazz, RelFactories.FilterFactory filterFactory)

Method Summary

Methods

Modifier and Type	Method and Description
void	onMatch(RelOptRuleCall call) Receives notification about a rule match.

Methods inherited from class org.apache.calcite.plan.RelOptRule

any, convert, convert, convertList, equals, equals, getOperand, getOperands, getOutConvention, getOutTrait, hashCode, matches, none, operand, operand, operand, operand, operand, some, toString, unordered

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

INSTANCE

public static final JoinPushTransitivePredicatesRule INSTANCE

The singleton.

Constructor Detail

JoinPushTransitivePredicatesRule

public JoinPushTransitivePredicatesRule(Class<? extends Join> clazz,
                                RelFactories.FilterFactory filterFactory)

Method Detail

onMatch

public void onMatch(RelOptRuleCall call)

Description copied from class: RelOptRule

Receives notification about a rule match. At the time that this method is called, call.rels holds the set of relational expressions which match the operands to the rule; call.rels[0] is the root expression.

Typically a rule would check that the nodes are valid matches, creates a new expression, then calls back RelOptRuleCall.transformTo(org.apache.calcite.rel.RelNode, java.util.Map<org.apache.calcite.rel.RelNode, org.apache.calcite.rel.RelNode>) to register the expression.

Specified by:

onMatch in class RelOptRule

Parameters:

call - Rule call

See Also:

RelOptRule.matches(RelOptRuleCall)