/*
* 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.plan.RelOptRuleCall;
import org.apache.calcite.rel.rules.SortProjectTransposeRule;
import org.apache.hadoop.hive.ql.optimizer.calcite.HiveCalciteUtil;
import org.apache.hadoop.hive.ql.optimizer.calcite.reloperators.HiveProject;
import org.apache.hadoop.hive.ql.optimizer.calcite.reloperators.HiveSortLimit;
public class HiveSortProjectTransposeRule extends SortProjectTransposeRule {
public static final HiveSortProjectTransposeRule INSTANCE =
new HiveSortProjectTransposeRule();
//~ Constructors -----------------------------------------------------------
/**
* Creates a HiveSortProjectTransposeRule.
*/
private HiveSortProjectTransposeRule() {
super(
operand(
HiveSortLimit.class,
operand(HiveProject.class, any())));
}
//~ Methods ----------------------------------------------------------------
@Override
public boolean matches(RelOptRuleCall call) {
final HiveSortLimit sortLimit = call.rel(0);
// If does not contain a limit operation, we bail out
if (!HiveCalciteUtil.limitRelNode(sortLimit)) {
return false;
}
return true;
}
}