CompGen.java example

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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.api.sql.optimizers;

import java.util.List;

import ch.epfl.data.squall.components.Component;
import ch.epfl.data.squall.components.DataSourceComponent;
import ch.epfl.data.squall.query_plans.QueryBuilder;

public interface CompGen {

    /*
     * adding a DataSourceComponent to the list of components Necessary to call
     * only when only one table is addresses in WHERE clause of a SQL query
     */
    public DataSourceComponent generateDataSource(String tableCompName);

    /*
     * Join between two components
     */
    public Component generateEquiJoin(Component left, Component right);

    public QueryBuilder getQueryBuilder();

    public List<Component> getSubPlans();

}