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

Class HiveAggregateIncrementalRewritingRuleBase<T extends HiveAggregateIncrementalRewritingRuleBase.IncrementalComputePlan>

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.hadoop.hive.ql.optimizer.calcite.rules.views.HiveAggregateIncrementalRewritingRuleBase<T>

Type Parameters:

T - Should be a class that wraps the right input of the top right outer join: the union branch which represents the plan which produces the delta records since the last view rebuild.

Direct Known Subclasses:

HiveAggregateInsertDeleteIncrementalRewritingRule, HiveAggregateInsertIncrementalRewritingRule

public abstract class HiveAggregateIncrementalRewritingRuleBase<T extends HiveAggregateIncrementalRewritingRuleBase.IncrementalComputePlan>
extends org.apache.calcite.plan.RelOptRule

This class implements the main algorithm of rewriting an MV maintenance plan to incremental. Subclasses are represents Calcite rules which performs a rewriting to prepare the plan for incremental view maintenance in case there exist aggregation operator, so we can avoid the INSERT OVERWRITE and use a MERGE statement instead. See subclasses for examples: HiveAggregateInsertIncrementalRewritingRule, HiveAggregateInsertDeleteIncrementalRewritingRule

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	HiveAggregateIncrementalRewritingRuleBase.IncrementalComputePlan

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

org.apache.calcite.plan.RelOptRule.ConverterRelOptRuleOperand

Field Summary

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

description, operands, relBuilderFactory

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	HiveAggregateIncrementalRewritingRuleBase(org.apache.calcite.plan.RelOptRuleOperand operand, org.apache.calcite.tools.RelBuilderFactory relBuilderFactory, String description, int aggregateIndex)

Method Summary

Modifier and Type	Method and Description
protected org.apache.calcite.rex.RexNode	createAggregateNode(org.apache.calcite.sql.SqlAggFunction aggCall, org.apache.calcite.rex.RexNode leftRef, org.apache.calcite.rex.RexNode rightRef, org.apache.calcite.rex.RexBuilder rexBuilder)
protected abstract org.apache.calcite.rex.RexNode	createFilterCondition(T rightInput, org.apache.calcite.rex.RexNode flagNode, List<org.apache.calcite.rex.RexNode> projExprs, org.apache.calcite.tools.RelBuilder relBuilder)
protected abstract T	createJoinRightInput(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, 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

Constructor Detail

HiveAggregateIncrementalRewritingRuleBase

protected HiveAggregateIncrementalRewritingRuleBase(org.apache.calcite.plan.RelOptRuleOperand operand,
                                                    org.apache.calcite.tools.RelBuilderFactory relBuilderFactory,
                                                    String description,
                                                    int aggregateIndex)

Method Detail

onMatch

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

Specified by:

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

createJoinRightInput

protected abstract T createJoinRightInput(org.apache.calcite.plan.RelOptRuleCall call)

createAggregateNode

protected org.apache.calcite.rex.RexNode createAggregateNode(org.apache.calcite.sql.SqlAggFunction aggCall,
                                                             org.apache.calcite.rex.RexNode leftRef,
                                                             org.apache.calcite.rex.RexNode rightRef,
                                                             org.apache.calcite.rex.RexBuilder rexBuilder)

createFilterCondition

protected abstract org.apache.calcite.rex.RexNode createFilterCondition(T rightInput,
                                                                        org.apache.calcite.rex.RexNode flagNode,
                                                                        List<org.apache.calcite.rex.RexNode> projExprs,
                                                                        org.apache.calcite.tools.RelBuilder relBuilder)