spark TypeCheckResult 源码
spark TypeCheckResult 代码
文件路径：/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/TypeCheckResult.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.analysis
/**
* Represents the result of `Expression.checkInputDataTypes`.
* We will throw `AnalysisException` in `CheckAnalysis` if `isFailure` is true.
*/
trait TypeCheckResult {
def isFailure: Boolean = !isSuccess
def isSuccess: Boolean
}
object TypeCheckResult {
/**
* Represents the successful result of `Expression.checkInputDataTypes`.
*/
object TypeCheckSuccess extends TypeCheckResult {
def isSuccess: Boolean = true
}
/**
* Represents the failing result of `Expression.checkInputDataTypes`,
* with an error message to show the reason of failure.
*/
case class TypeCheckFailure(message: String) extends TypeCheckResult {
def isSuccess: Boolean = false
}
/**
* Represents an error of data type mismatch with the `DATATYPE_MISMATCH` error class.
*
* @param errorSubClass A sub-class of `DATATYPE_MISMATCH`.
* @param messageParameters Parameters of the sub-class error message.
*/
case class DataTypeMismatch(
errorSubClass: String,
messageParameters: Map[String, String] = Map.empty)
extends TypeCheckResult {
def isSuccess: Boolean = false
}
}
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