spark GetStructFieldObject 源码
spark GetStructFieldObject 代码
文件路径：/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/GetStructFieldObject.scala
/*
* 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.catalyst.expressions
import org.apache.spark.sql.types.StructField
/**
* A Scala extractor that extracts the child expression and struct field from a [[GetStructField]].
* This is in contrast to the [[GetStructField]] case class extractor which returns the field
* ordinal instead of the field itself.
*/
object GetStructFieldObject {
def unapply(getStructField: GetStructField): Option[(Expression, StructField)] =
Some((
getStructField.child,
getStructField.childSchema(getStructField.ordinal)))
}
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