ThetaOrdersSelfJoin.java example

Explorer
squall-master
/*
 * Copyright (c) 2011-2015 EPFL DATA Laboratory
 * Copyright (c) 2014-2015 The Squall Collaboration (see NOTICE)
 *
 * All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package ch.epfl.data.squall.examples.imperative.theta;

import java.util.Arrays;
import java.util.Date;
import java.util.List;
import java.util.Map;

import ch.epfl.data.squall.components.Component;
import ch.epfl.data.squall.components.DataSourceComponent;
import ch.epfl.data.squall.components.theta.ThetaJoinComponentFactory;
import ch.epfl.data.squall.expressions.Addition;
import ch.epfl.data.squall.expressions.ColumnReference;
import ch.epfl.data.squall.expressions.Multiplication;
import ch.epfl.data.squall.expressions.Subtraction;
import ch.epfl.data.squall.expressions.ValueExpression;
import ch.epfl.data.squall.expressions.ValueSpecification;
import ch.epfl.data.squall.operators.AggregateAvgOperator;
import ch.epfl.data.squall.operators.AggregateOperator;
import ch.epfl.data.squall.operators.ProjectOperator;
import ch.epfl.data.squall.operators.SelectOperator;
import ch.epfl.data.squall.predicates.ComparisonPredicate;
import ch.epfl.data.squall.query_plans.QueryBuilder;
import ch.epfl.data.squall.query_plans.ThetaQueryPlansParameters;
import ch.epfl.data.squall.types.DateType;
import ch.epfl.data.squall.types.DoubleType;
import ch.epfl.data.squall.types.NumericType;
import ch.epfl.data.squall.types.Type;

public class ThetaOrdersSelfJoin {

    private QueryBuilder _queryBuilder = new QueryBuilder();
    private static final String _date1Str = "1993-06-17";
    private static final Type<Date> _dateConv = new DateType();
    private static final NumericType<Double> _doubleConv = new DoubleType();
    private static final Date _date1 = _dateConv.fromString(_date1Str);

    public ThetaOrdersSelfJoin(String dataPath, String extension, Map conf) {
	int Theta_JoinType = ThetaQueryPlansParameters.getThetaJoinType(conf);

	double value = 7000.0;

	ComparisonPredicate comp1 = new ComparisonPredicate(
		ComparisonPredicate.LESS_OP, new ColumnReference(_dateConv, 4),
		new ValueSpecification(_dateConv, _date1));

	ComparisonPredicate comp2 = new ComparisonPredicate(
		ComparisonPredicate.GREATER_OP, new ColumnReference(
			_doubleConv, 1), new ValueSpecification(_doubleConv,
			value));

	SelectOperator selectionOrders1 = new SelectOperator(comp1);
	final List<Integer> hashLineitem = Arrays.asList(1);

	// SelectOperator selectionOrders1 = new SelectOperator(new
	// AndPredicate(comp1, comp2));

	DataSourceComponent relationOrders1 = new DataSourceComponent(
		"ORDERS1", dataPath + "orders" + extension)
		.add(selectionOrders1)
		.add(new ProjectOperator(new int[] { 0, 3 }))
		.setOutputPartKey(hashLineitem);
	_queryBuilder.add(relationOrders1);

	SelectOperator selectionOrders2 = new SelectOperator(
		new ComparisonPredicate(ComparisonPredicate.NONLESS_OP,
			new ColumnReference(_dateConv, 4),
			new ValueSpecification(_dateConv, _date1)));

	DataSourceComponent relationOrders2 = new DataSourceComponent(
		"ORDERS2", dataPath + "orders" + extension)
		.add(selectionOrders2)
		.add(new ProjectOperator(new int[] { 0, 3 }))
		.setOutputPartKey(hashLineitem);
	_queryBuilder.add(relationOrders2);

	// Aggregate
	ValueExpression<Double> substract = new Subtraction(
		new ColumnReference(_doubleConv, 1), new ColumnReference(
			_doubleConv, 3));
	AggregateOperator agg = new AggregateAvgOperator(substract, conf);

	// Join Predicate
	ColumnReference colOrders1 = new ColumnReference(_doubleConv, 1);
	ColumnReference colOrders2 = new ColumnReference(_doubleConv, 1);

	Addition add = new Addition(colOrders1, new ValueSpecification(
		_doubleConv, value));
	Subtraction sub = new Subtraction(colOrders1, new ValueSpecification(
		_doubleConv, value));
	// ComparisonPredicate pred1 = new
	// ComparisonPredicate(ComparisonPredicate.GREATER_OP, add, colOrders2);
	ComparisonPredicate pred2 = new ComparisonPredicate(
		ComparisonPredicate.LESS_OP, sub, colOrders2);
	// ComparisonPredicate pred2 = new
	// ComparisonPredicate(ComparisonPredicate.GREATER_OP, colOrders1,
	// colOrders2);

	Multiplication mult = new Multiplication(colOrders2,
		new ValueSpecification(_doubleConv, 10.0));

	ComparisonPredicate pred3 = new ComparisonPredicate(
		ComparisonPredicate.GREATER_OP, colOrders1, mult);

	Component ORDERS_ORDERSjoin = ThetaJoinComponentFactory
		.createThetaJoinOperator(Theta_JoinType, relationOrders1,
			relationOrders2, _queryBuilder).setJoinPredicate(pred3)
		.add(agg).setContentSensitiveThetaJoinWrapper(_doubleConv);
    }

    public QueryBuilder getQueryPlan() {
	return _queryBuilder;
    }

}