org.apache.spark.sql.execution.local.ConvertToSafeNode.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
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* 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
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package org.apache.spark.sql.execution.local

import org.apache.spark.sql.SQLConf
import org.apache.spark.sql.catalyst.InternalRow
import org.apache.spark.sql.catalyst.expressions.{Attribute, FromUnsafeProjection, Projection}

case class ConvertToSafeNode(conf: SQLConf, child: LocalNode) extends UnaryLocalNode(conf) {

  override def output: Seq[Attribute] = child.output

  private[this] var convertToSafe: Projection = _

  override def open(): Unit = {
    child.open()
    convertToSafe = FromUnsafeProjection(child.schema)
  }

  override def next(): Boolean = child.next()

  override def fetch(): InternalRow = convertToSafe(child.fetch())

  override def close(): Unit = child.close()
}