spark SQLOrderingUtil 源码
spark SQLOrderingUtil 代码
文件路径：/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/SQLOrderingUtil.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.util
object SQLOrderingUtil {
/**
* A special version of double comparison that follows SQL semantic:
* 1. NaN == NaN
* 2. NaN is greater than any non-NaN double
* 3. -0.0 == 0.0
*/
def compareDoubles(x: Double, y: Double): Int = {
if (x == y) 0 else java.lang.Double.compare(x, y)
}
/**
* A special version of float comparison that follows SQL semantic:
* 1. NaN == NaN
* 2. NaN is greater than any non-NaN float
* 3. -0.0 == 0.0
*/
def compareFloats(x: Float, y: Float): Int = {
if (x == y) 0 else java.lang.Float.compare(x, y)
}
}
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