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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.beam.sdk.extensions.sql.impl.rel;
  
  import org.apache.beam.vendor.calcite.v1_40_0.org.apache.calcite.plan.Convention;
  import org.apache.beam.vendor.calcite.v1_40_0.org.apache.calcite.plan.ConventionTraitDef;
  import org.apache.beam.vendor.calcite.v1_40_0.org.apache.calcite.plan.RelOptPlanner;
  import org.apache.beam.vendor.calcite.v1_40_0.org.apache.calcite.plan.RelTrait;
  import org.apache.beam.vendor.calcite.v1_40_0.org.apache.calcite.plan.RelTraitDef;
  import org.apache.beam.vendor.calcite.v1_40_0.org.apache.calcite.plan.RelTraitSet;
  
  /** Convention for Beam SQL. */
  @SuppressWarnings({
    "rawtypes" // TODO(https://github.com/apache/beam/issues/20447)
  })
  public enum BeamLogicalConvention implements Convention {
    INSTANCE;
  
    @Override
    public Class getInterface() {
      return BeamRelNode.class;
    }
  
    @Override
    public String getName() {
      return "BEAM_LOGICAL";
    }
  
    @Override
    public RelTraitDef getTraitDef() {
      return ConventionTraitDef.INSTANCE;
    }
  
    @Override
    public boolean satisfies(RelTrait trait) {
      return this == trait;
    }
  
    @Override
    public void register(RelOptPlanner planner) {}
  
    @Override
    public String toString() {
      return getName();
    }
  
    @Override
    public boolean canConvertConvention(Convention toConvention) {
      return false;
    }
  
    @Override
    public boolean useAbstractConvertersForConversion(RelTraitSet fromTraits, RelTraitSet toTraits) {
      return false;
    }
  }
  