org.apache.hudi.HoodieEmptyRelation.scala Maven / Gradle / Ivy

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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,
 * 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.hudi

import org.apache.spark.sql.SQLContext
import org.apache.spark.sql.sources.BaseRelation
import org.apache.spark.sql.types.StructType

/**
  * This is a dummy Spark relation that can be used if needed to return a place holder relation that does not get used.
  *
  * @param sqlContext Spark SQL Context
  * @param userSchema Users data schema
  */
class HoodieEmptyRelation(val sqlContext: SQLContext,
                          val userSchema: StructType) extends BaseRelation {

  override def schema: StructType = userSchema
}