org.apache.hadoop.hive.ql.optimizer.calcite.rules

Class HiveSemiJoinProjectTransposeRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.hadoop.hive.ql.optimizer.calcite.rules.HiveSemiJoinProjectTransposeRule

public class HiveSemiJoinProjectTransposeRule
extends org.apache.calcite.plan.RelOptRule

This rule is similar to SemiJoinProjectTransposeRule. However, it works on Hive nodes rather than logical nodes.

The rule pushes a Semijoin down in a tree past a Project if the Project is followed by a Join. The intention is to remove Projects between Joins.

SemiJoin(Project(X), Y) → Project(SemiJoin(X, Y))

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.calcite.plan.RelOptRule

org.apache.calcite.plan.RelOptRule.ConverterRelOptRuleOperand

Field Summary

Fields

Modifier and Type	Field and Description
static HiveSemiJoinProjectTransposeRule	INSTANCE

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

description, operands, relBuilderFactory

Method Summary

Modifier and Type	Method and Description
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, matches, 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 HiveSemiJoinProjectTransposeRule INSTANCE

Method Detail

onMatch

public void onMatch(org.apache.calcite.plan.RelOptRuleCall call)

Specified by:

onMatch in class org.apache.calcite.plan.RelOptRule