/**
 * 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.core.Filter;
import org.apache.calcite.rel.rules.FilterSetOpTransposeRule;
import org.apache.calcite.rex.RexNode;
import org.apache.calcite.tools.RelBuilderFactory;
import org.apache.hadoop.hive.ql.optimizer.calcite.HiveCalciteUtil;
import org.apache.hadoop.hive.ql.optimizer.calcite.HiveRelFactories;


public class HiveFilterSetOpTransposeRule extends FilterSetOpTransposeRule {

  public static final HiveFilterSetOpTransposeRule INSTANCE =
          new HiveFilterSetOpTransposeRule(HiveRelFactories.HIVE_BUILDER);

  /**
   * Creates a HiveFilterSetOpTransposeRule.
   */
  private HiveFilterSetOpTransposeRule(RelBuilderFactory relBuilderFactory) {
    super(relBuilderFactory);
  }

  @Override
  public boolean matches(RelOptRuleCall call) {
    Filter filterRel = call.rel(0);
    RexNode condition = filterRel.getCondition();
    if (!HiveCalciteUtil.isDeterministic(condition)) {
      return false;
    }

    return super.matches(call);
  }
}
