gr.uoa.di.madgik.hive.analyzer
Class OperatorAnalyzer

java.lang.Object
  gr.uoa.di.madgik.hive.analyzer.OperatorAnalyzer

public class OperatorAnalyzer
extends Object

Analyze Hive operators in order to create an abstract operator plan

Author:

john.gerbesiotis - DI NKUA

Constructor Summary

OperatorAnalyzer()

Method Summary

static void	analyzeOperator(org.apache.hadoop.hive.ql.exec.Operator<? extends org.apache.hadoop.hive.ql.plan.OperatorDesc> op) Analyzes the Hive operators plan
static PlanNode	concatPlans(PlanNode main, PlanNode exten) Merge two plans into one.
static PlanNode	getPlan() Get the created plan
static PlanNode	optimizePlan(PlanNode node) Optimize provided plan

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

OperatorAnalyzer

public OperatorAnalyzer()

Method Detail

analyzeOperator

public static void analyzeOperator(org.apache.hadoop.hive.ql.exec.Operator<? extends org.apache.hadoop.hive.ql.plan.OperatorDesc> op)
                            throws Exception

Analyzes the Hive operators plan

Parameters:

op - Hive plan

Throws:

Exception - if parsing fails

concatPlans

public static PlanNode concatPlans(PlanNode main,
                                   PlanNode exten)
                            throws Exception

Merge two plans into one. main plan should be a typical query while exten query could also be an output query.

Parameters:

main - Main plan to be merged

exten - Extension to main plan

Returns:

Concatenation of the plans

Throws:

Exception - If plans can not be concatenated

optimizePlan

public static PlanNode optimizePlan(PlanNode node)

Optimize provided plan

Parameters:

node - The plan to be optimized

Returns:

The optimization of the plan

getPlan

public static PlanNode getPlan()

Get the created plan

Returns:

the plan that was created