org.apache.calcite.rel.rules

Class JoinExtractFilterRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.calcite.rel.rules.AbstractJoinExtractFilterRule

org.apache.calcite.rel.rules.JoinExtractFilterRule

public final class JoinExtractFilterRule
extends AbstractJoinExtractFilterRule

Rule to convert an inner join to a filter on top of a cartesian inner join.

One benefit of this transformation is that after it, the join condition can be combined with conditions and expressions above the join. It also makes the FennelCartesianJoinRule applicable.

The constructor is parameterized to allow any sub-class of Join, not just LogicalJoin.

Field Summary

Fields

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

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

description, operands, relBuilderFactory

Constructor Summary

Constructors

Constructor and Description
JoinExtractFilterRule(Class<? extends Join> clazz, RelBuilderFactory relBuilderFactory) Creates a JoinExtractFilterRule.

Method Summary

Methods inherited from class org.apache.calcite.rel.rules.AbstractJoinExtractFilterRule

onMatch

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

any, convert, convert, convertList, convertOperand, 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 JoinExtractFilterRule INSTANCE

The singleton.

Constructor Detail

JoinExtractFilterRule

public JoinExtractFilterRule(Class<? extends Join> clazz,
                             RelBuilderFactory relBuilderFactory)

Creates a JoinExtractFilterRule.