spark ExpressionWithToString 源码
spark ExpressionWithToString 代码
文件路径：/sql/catalyst/src/main/scala/org/apache/spark/sql/internal/connector/ExpressionWithToString.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.internal.connector
import org.apache.spark.sql.connector.expressions.Expression
abstract class ExpressionWithToString extends Expression with Serializable {
private val builder = new ToStringSQLBuilder()
override def toString(): String = builder.build(this);
}
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