org.apache.drill.exec.planner.logical.DrillPushProjectPastJoinRule Maven / Gradle / Ivy

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/*
 * 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,
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 * See the License for the specific language governing permissions and
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package org.apache.drill.exec.planner.logical;

import org.apache.calcite.rel.core.Join;
import org.apache.calcite.rel.core.Project;
import org.apache.calcite.rel.rules.ProjectJoinTransposeRule;
import org.apache.calcite.rel.rules.PushProjector;
import org.apache.calcite.plan.RelOptRule;

public class DrillPushProjectPastJoinRule extends ProjectJoinTransposeRule {

  public static final RelOptRule INSTANCE = new DrillPushProjectPastJoinRule(DrillConditions.PRESERVE_ITEM);

  protected DrillPushProjectPastJoinRule(PushProjector.ExprCondition preserveExprCondition) {
    super(Config.DEFAULT
      .withRelBuilderFactory(DrillRelFactories.LOGICAL_BUILDER)
      .as(Config.class)
      .withOperandFor(Project.class, Join.class)
      .withPreserveExprCondition(preserveExprCondition));
  }

}