content: /*
   * 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.beam.sdk.extensions.sql.impl.planner;
  
  import org.apache.beam.vendor.calcite.v1_40_0.org.apache.calcite.rel.type.RelDataTypeSystem;
  import org.apache.beam.vendor.calcite.v1_40_0.org.apache.calcite.rel.type.RelDataTypeSystemImpl;
  import org.apache.beam.vendor.calcite.v1_40_0.org.apache.calcite.sql.type.SqlTypeName;
  
  /** customized data type in Beam. */
  public class BeamRelDataTypeSystem extends RelDataTypeSystemImpl {
    public static final RelDataTypeSystem INSTANCE = new BeamRelDataTypeSystem();
  
    private BeamRelDataTypeSystem() {}
  
    @Override
    public int getMaxNumericScale() {
      return 38;
    }
  
    @Override
    public int getMaxNumericPrecision() {
      return 38;
    }
  
    /* operators that change string length should return varchar. */
    @Override
    public boolean shouldConvertRaggedUnionTypesToVarying() {
      return true;
    }
  
    @Override
    public int getDefaultPrecision(SqlTypeName typeName) {
      switch (typeName) {
        case TIME:
        case TIMESTAMP:
        case TIMESTAMP_WITH_LOCAL_TIME_ZONE:
          return 6; // support microsecond precision
        default:
          return super.getDefaultPrecision(typeName);
      }
    }
  
    @Override
    public int getMaxPrecision(SqlTypeName typeName) {
      switch (typeName) {
        case TIME:
        case TIMESTAMP:
        case TIMESTAMP_WITH_LOCAL_TIME_ZONE:
          return 6; // support microsecond precision
        default:
          return super.getMaxPrecision(typeName);
      }
    }
  }
  