| /* |
| * 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.vxquery.compiler.rewriter.rules.algebricksalternatives; |
| |
| import java.util.List; |
| |
| import org.apache.commons.lang3.mutable.Mutable; |
| |
| import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException; |
| import org.apache.hyracks.algebricks.core.algebra.base.ILogicalExpression; |
| import org.apache.hyracks.algebricks.core.algebra.base.ILogicalOperator; |
| import org.apache.hyracks.algebricks.core.algebra.base.ILogicalPlan; |
| import org.apache.hyracks.algebricks.core.algebra.base.IOptimizationContext; |
| import org.apache.hyracks.algebricks.core.algebra.base.LogicalExpressionTag; |
| import org.apache.hyracks.algebricks.core.algebra.base.LogicalOperatorTag; |
| import org.apache.hyracks.algebricks.core.algebra.base.LogicalVariable; |
| import org.apache.hyracks.algebricks.core.algebra.expressions.AbstractFunctionCallExpression; |
| import org.apache.hyracks.algebricks.core.algebra.operators.logical.AbstractLogicalOperator; |
| import org.apache.hyracks.algebricks.core.algebra.operators.logical.AbstractOperatorWithNestedPlans; |
| import org.apache.hyracks.algebricks.core.algebra.operators.logical.AssignOperator; |
| import org.apache.hyracks.algebricks.rewriter.rules.InlineVariablesRule; |
| |
| /** |
| * Modifies the InlineVariablesRule to also process nested plans. |
| */ |
| public class InlineNestedVariablesRule extends InlineVariablesRule { |
| |
| protected boolean inlineVariables(Mutable<ILogicalOperator> opRef, IOptimizationContext context) |
| throws AlgebricksException { |
| AbstractLogicalOperator op = (AbstractLogicalOperator) opRef.getValue(); |
| |
| // Update mapping from variables to expressions during top-down traversal. |
| if (op.getOperatorTag() == LogicalOperatorTag.ASSIGN) { |
| AssignOperator assignOp = (AssignOperator) op; |
| List<LogicalVariable> vars = assignOp.getVariables(); |
| List<Mutable<ILogicalExpression>> exprs = assignOp.getExpressions(); |
| for (int i = 0; i < vars.size(); i++) { |
| ILogicalExpression expr = exprs.get(i).getValue(); |
| // Ignore functions that are either in the doNotInline set or are non-functional |
| if (expr.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) { |
| AbstractFunctionCallExpression funcExpr = (AbstractFunctionCallExpression) expr; |
| if (doNotInlineFuncs.contains(funcExpr.getFunctionIdentifier()) || !funcExpr.isFunctional()) { |
| continue; |
| } |
| } |
| varAssignRhs.put(vars.get(i), exprs.get(i).getValue()); |
| } |
| } |
| |
| boolean modified = false; |
| // Descend into nested plans inlining along the way. |
| if (op.hasNestedPlans()) { |
| AbstractOperatorWithNestedPlans nestedOp = (AbstractOperatorWithNestedPlans) op; |
| for (ILogicalPlan nestedPlan : nestedOp.getNestedPlans()) { |
| for (Mutable<ILogicalOperator> nestedOpRef : nestedPlan.getRoots()) { |
| if (inlineVariables(nestedOpRef, context)) { |
| modified = true; |
| } |
| } |
| } |
| } |
| |
| // Descend into children inlining along on the way. |
| for (Mutable<ILogicalOperator> inputOpRef : op.getInputs()) { |
| if (inlineVariables(inputOpRef, context)) { |
| modified = true; |
| } |
| } |
| |
| if (performBottomUpAction(op)) { |
| modified = true; |
| } |
| |
| if (modified) { |
| context.computeAndSetTypeEnvironmentForOperator(op); |
| context.addToDontApplySet(this, op); |
| // Re-enable rules that we may have already tried. They could be applicable now after inlining. |
| context.removeFromAlreadyCompared(opRef.getValue()); |
| } |
| |
| return modified; |
| } |
| } |