| /* |
| * Copyright 2009-2010 by The Regents of the University of California |
| * 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 from |
| * |
| * 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 edu.uci.ics.hyracks.algebricks.rewriter.rules; |
| |
| import org.apache.commons.lang3.mutable.Mutable; |
| import org.apache.commons.lang3.mutable.MutableObject; |
| |
| import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.base.IOptimizationContext; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.base.IPhysicalOperator; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalOperatorTag; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.base.PhysicalOperatorTag; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AbstractLogicalOperator; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AbstractLogicalOperator.ExecutionMode; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ExchangeOperator; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.operators.physical.OneToOneExchangePOperator; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.util.OperatorPropertiesUtil; |
| import edu.uci.ics.hyracks.algebricks.core.rewriter.base.IAlgebraicRewriteRule; |
| |
| public class IsolateHyracksOperatorsRule implements IAlgebraicRewriteRule { |
| |
| private final PhysicalOperatorTag[] operatorsBelowWhichJobGenIsDisabled; |
| |
| public IsolateHyracksOperatorsRule(PhysicalOperatorTag[] operatorsBelowWhichJobGenIsDisabled) { |
| this.operatorsBelowWhichJobGenIsDisabled = operatorsBelowWhichJobGenIsDisabled; |
| } |
| |
| @Override |
| public boolean rewritePost(Mutable<ILogicalOperator> opRef, IOptimizationContext context) |
| throws AlgebricksException { |
| AbstractLogicalOperator op = (AbstractLogicalOperator) opRef.getValue(); |
| IPhysicalOperator pt = op.getPhysicalOperator(); |
| |
| if (pt == null || op.getOperatorTag() == LogicalOperatorTag.EXCHANGE) { |
| return false; |
| } |
| if (!pt.isMicroOperator()) { |
| return testIfExchangeBelow(opRef, context); |
| } else { |
| return testIfExchangeAbove(opRef, context); |
| } |
| } |
| |
| @Override |
| public boolean rewritePre(Mutable<ILogicalOperator> opRef, IOptimizationContext context) { |
| return false; |
| } |
| |
| private boolean testIfExchangeBelow(Mutable<ILogicalOperator> opRef, IOptimizationContext context) |
| throws AlgebricksException { |
| AbstractLogicalOperator op = (AbstractLogicalOperator) opRef.getValue(); |
| boolean exchInserted = false; |
| |
| for (Mutable<ILogicalOperator> i : op.getInputs()) { |
| AbstractLogicalOperator c = (AbstractLogicalOperator) i.getValue(); |
| if (c.getOperatorTag() != LogicalOperatorTag.EXCHANGE) { |
| if (c.getPhysicalOperator() == null) { |
| return false; |
| } |
| insertOneToOneExchange(i, context); |
| exchInserted = true; |
| } |
| } |
| IPhysicalOperator pt = op.getPhysicalOperator(); |
| if (pt.isJobGenDisabledBelowMe() || arrayContains(operatorsBelowWhichJobGenIsDisabled, pt.getOperatorTag())) { |
| for (Mutable<ILogicalOperator> i : op.getInputs()) { |
| disableJobGenRec(i.getValue()); |
| } |
| } |
| return exchInserted; |
| } |
| |
| private void disableJobGenRec(ILogicalOperator operator) { |
| AbstractLogicalOperator op = (AbstractLogicalOperator) operator; |
| op.disableJobGen(); |
| for (Mutable<ILogicalOperator> i : op.getInputs()) { |
| disableJobGenRec(i.getValue()); |
| } |
| } |
| |
| private boolean testIfExchangeAbove(Mutable<ILogicalOperator> opRef, IOptimizationContext context) |
| throws AlgebricksException { |
| AbstractLogicalOperator op = (AbstractLogicalOperator) opRef.getValue(); |
| if (op.getOperatorTag() == LogicalOperatorTag.EXCHANGE) { |
| return false; |
| } |
| boolean exchInserted = false; |
| for (Mutable<ILogicalOperator> i : op.getInputs()) { |
| AbstractLogicalOperator c = (AbstractLogicalOperator) i.getValue(); |
| IPhysicalOperator cpop = c.getPhysicalOperator(); |
| if (c.getOperatorTag() == LogicalOperatorTag.EXCHANGE || cpop == null) { |
| continue; |
| } |
| if (!cpop.isMicroOperator()) { |
| insertOneToOneExchange(i, context); |
| exchInserted = true; |
| } |
| } |
| return exchInserted; |
| } |
| |
| private final static <T> boolean arrayContains(T[] array, T tag) { |
| for (int i = 0; i < array.length; i++) { |
| if (array[i] == tag) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| private final static void insertOneToOneExchange(Mutable<ILogicalOperator> i, IOptimizationContext context) |
| throws AlgebricksException { |
| ExchangeOperator e = new ExchangeOperator(); |
| e.setPhysicalOperator(new OneToOneExchangePOperator()); |
| ILogicalOperator inOp = i.getValue(); |
| |
| e.getInputs().add(new MutableObject<ILogicalOperator>(inOp)); |
| i.setValue(e); |
| // e.recomputeSchema(); |
| OperatorPropertiesUtil.computeSchemaAndPropertiesRecIfNull(e, context); |
| ExecutionMode em = ((AbstractLogicalOperator) inOp).getExecutionMode(); |
| e.setExecutionMode(em); |
| e.computeDeliveredPhysicalProperties(context); |
| context.computeAndSetTypeEnvironmentForOperator(e); |
| } |
| |
| } |