RewriteMultiJoinConditionRule (Flink : 2.0-SNAPSHOT API)

java.lang.Object
- org.apache.calcite.plan.RelOptRule
- - org.apache.calcite.plan.RelRule<RewriteMultiJoinConditionRule.RewriteMultiJoinConditionRuleConfig>
  - - org.apache.flink.table.planner.plan.rules.logical.RewriteMultiJoinConditionRule

```
@Enclosing
public class RewriteMultiJoinConditionRule
extends org.apache.calcite.plan.RelRule<RewriteMultiJoinConditionRule.RewriteMultiJoinConditionRuleConfig>
```
Planner rule to apply transitive closure on MultiJoin for equi-join predicates.
e.g. MJ(A, B, C) ON A.a1=B.b1 AND B.b1=C.c1 → MJ(A, B, C) ON A.a1=B.b1 AND B.b1=C.c1 AND A.a1=C.c1
The advantage of applying this rule is that it increases the choice of join reorder; at the same time, the disadvantage is that it will use more CPU for additional join predicates.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static interface RewriteMultiJoinConditionRule.RewriteMultiJoinConditionRuleConfig
Rule configuration.
- Nested classes/interfaces inherited from class org.apache.calcite.plan.RelRule
  org.apache.calcite.plan.RelRule.Config, org.apache.calcite.plan.RelRule.Done, org.apache.calcite.plan.RelRule.MatchHandler<R extends org.apache.calcite.plan.RelOptRule>, org.apache.calcite.plan.RelRule.OperandBuilder, org.apache.calcite.plan.RelRule.OperandDetailBuilder<R extends org.apache.calcite.rel.RelNode>, org.apache.calcite.plan.RelRule.OperandTransform
- Nested classes/interfaces inherited from class org.apache.calcite.plan.RelOptRule
  org.apache.calcite.plan.RelOptRule.ConverterRelOptRuleOperand

Field Summary

Fields
Modifier and Type Field Description

static RewriteMultiJoinConditionRule INSTANCE
- Fields inherited from class org.apache.calcite.plan.RelRule
  config
- Fields inherited from class org.apache.calcite.plan.RelOptRule
  description, operands, relBuilderFactory

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`matches(org.apache.calcite.plan.RelOptRuleCall call)`
`void`	`onMatch(org.apache.calcite.plan.RelOptRuleCall call)`

Methods inherited from class org.apache.calcite.plan.RelOptRule
any, convert, convert, convertList, convertOperand, convertOperand, equals, equals, getOperand, getOperands, getOutConvention, getOutTrait, hashCode, none, operand, operand, operand, operand, operand, operandJ, operandJ, some, toString, unordered

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

INSTANCE

public static final RewriteMultiJoinConditionRule INSTANCE

Method Detail
- matches
```
public boolean matches(org.apache.calcite.plan.RelOptRuleCall call)
```
  Overrides:
  
  matches in class org.apache.calcite.plan.RelOptRule
- onMatch
```
public void onMatch(org.apache.calcite.plan.RelOptRuleCall call)
```
  Specified by:
  
  onMatch in class org.apache.calcite.plan.RelOptRule