/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.tajo.plan;
import org.apache.tajo.algebra.Expr;
import org.apache.tajo.catalog.CatalogService;
import org.apache.tajo.exception.TajoException;
import org.apache.tajo.plan.LogicalPlanner.PlanContext;
import org.apache.tajo.plan.logical.LogicalNode;
import org.apache.tajo.plan.rewrite.BaseLogicalPlanPreprocessEngine;
import org.apache.tajo.plan.rewrite.BaseLogicalPlanPreprocessPhaseProvider;
/**
* It finds all relations for each block and builds base schema information.
*/
public class LogicalPlanPreprocessor {
private BaseLogicalPlanPreprocessEngine engine;
private BaseLogicalPlanPreprocessPhaseProvider provider;
LogicalPlanPreprocessor(CatalogService catalog, ExprAnnotator annotator) {
provider = new BaseLogicalPlanPreprocessPhaseProvider();
engine = new BaseLogicalPlanPreprocessEngine(catalog, annotator);
engine.addProcessPhase(provider.getPhases());
}
public LogicalNode process(PlanContext context, Expr expr) throws TajoException {
return engine.process(context, expr);
}
}