org.apache.spark.sql.execution.python.PythonUDF.scala Maven / Gradle / Ivy
/*
* 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.spark.sql.execution.python
import org.apache.spark.api.python.PythonFunction
import org.apache.spark.sql.catalyst.expressions.{Expression, NonSQLExpression, Unevaluable, UserDefinedExpression}
import org.apache.spark.sql.types.DataType
/**
* A serialized version of a Python lambda function.
*/
case class PythonUDF(
name: String,
func: PythonFunction,
dataType: DataType,
children: Seq[Expression],
evalType: Int,
udfDeterministic: Boolean)
extends Expression with Unevaluable with NonSQLExpression with UserDefinedExpression {
override lazy val deterministic: Boolean = udfDeterministic && children.forall(_.deterministic)
override def toString: String = s"$name(${children.mkString(", ")})"
override def nullable: Boolean = true
}