spark TimestampNTZType 源码
spark TimestampNTZType 代码
文件路径：/sql/catalyst/src/main/scala/org/apache/spark/sql/types/TimestampNTZType.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.types
import scala.reflect.runtime.universe.typeTag
import org.apache.spark.annotation.Unstable
/**
* The timestamp without time zone type represents a local time in microsecond precision,
* which is independent of time zone.
* Its valid range is [0001-01-01T00:00:00.000000, 9999-12-31T23:59:59.999999].
* To represent an absolute point in time, use `TimestampType` instead.
*
* Please use the singleton `DataTypes.TimestampNTZType` to refer the type.
* @since 3.4.0
*/
@Unstable
class TimestampNTZType private() extends DatetimeType {
/**
* Internally, a timestamp is stored as the number of microseconds from
* the epoch of 1970-01-01T00:00:00.000000(Unix system time zero)
*/
private[sql] type InternalType = Long
@transient private[sql] lazy val tag = typeTag[InternalType]
private[sql] val ordering = implicitly[Ordering[InternalType]]
/**
* The default size of a value of the TimestampNTZType is 8 bytes.
*/
override def defaultSize: Int = 8
override def typeName: String = "timestamp_ntz"
private[spark] override def asNullable: TimestampNTZType = this
}
/**
* The companion case object and its class is separated so the companion object also subclasses
* the TimestampNTZType class. Otherwise, the companion object would be of type
* "TimestampNTZType" in byte code. Defined with a private constructor so the companion
* object is the only possible instantiation.
*
* @since 3.4.0
*/
@Unstable
case object TimestampNTZType extends TimestampNTZType
相关信息
相关文章
0
赞
- 所属分类： 前端技术
- 本文标签：
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
7、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦