/**
* 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.hadoop.hive.ql.optimizer.calcite.rules;
import org.apache.calcite.adapter.druid.DruidQuery;
import org.apache.calcite.rel.core.Filter;
import org.apache.calcite.rel.core.Project;
import org.apache.calcite.rel.core.RelFactories;
import org.apache.calcite.rel.rules.ProjectFilterTransposeRule;
import org.apache.calcite.rel.rules.PushProjector;
import org.apache.hadoop.hive.ql.optimizer.calcite.HiveRelFactories;
/**
* Rule to push a {@link org.apache.calcite.rel.core.Project}
* past a {@link org.apache.calcite.rel.core.Filter}
* when {@code Filter} is on top of a {@link DruidQuery}.
* TODO: Replace this class with calcite DruidRules.DruidFilterProjectTransposeRule
* once we upgrade to calcite 1.13
*/
public class HiveDruidProjectFilterTransposeRule
extends ProjectFilterTransposeRule {
public static final HiveDruidProjectFilterTransposeRule INSTANCE =
new HiveDruidProjectFilterTransposeRule();
private HiveDruidProjectFilterTransposeRule() {
super(
operand(Project.class,
operand(Filter.class, operand(DruidQuery.class, none()))),
PushProjector.ExprCondition.FALSE,
HiveRelFactories.HIVE_BUILDER);
}
}