druid/src/main/java/org/apache/calcite/adapter/druid/DimensionSpec.java

/*
 * 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.calcite.adapter.druid;

import javax.annotation.Nullable;

/**
 * Interface for Druid DimensionSpec.
 *
 * <p>DimensionSpecs define how dimension values get transformed prior to aggregation.
 */
public interface DimensionSpec extends DruidJson {
  String getOutputName();
  DruidType getOutputType();
  @Nullable ExtractionFunction getExtractionFn();
  String getDimension();
}