spark DateTimeConstants 源码

2022-10-20
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spark DateTimeConstants 代码

文件路径：/common/unsafe/src/main/java/org/apache/spark/sql/catalyst/util/DateTimeConstants.java

/*
 * 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;

public class DateTimeConstants {

  public static final int MONTHS_PER_YEAR = 12;

  public static final byte DAYS_PER_WEEK = 7;

  public static final long HOURS_PER_DAY = 24L;

  public static final long MINUTES_PER_HOUR = 60L;

  public static final long SECONDS_PER_MINUTE = 60L;
  public static final long SECONDS_PER_HOUR = MINUTES_PER_HOUR * SECONDS_PER_MINUTE;
  public static final long SECONDS_PER_DAY = HOURS_PER_DAY * SECONDS_PER_HOUR;

  public static final long MILLIS_PER_SECOND = 1000L;
  public static final long MILLIS_PER_MINUTE = SECONDS_PER_MINUTE * MILLIS_PER_SECOND;
  public static final long MILLIS_PER_HOUR = MINUTES_PER_HOUR * MILLIS_PER_MINUTE;
  public static final long MILLIS_PER_DAY = HOURS_PER_DAY * MILLIS_PER_HOUR;

  public static final long MICROS_PER_MILLIS = 1000L;
  public static final long MICROS_PER_SECOND = MILLIS_PER_SECOND * MICROS_PER_MILLIS;
  public static final long MICROS_PER_MINUTE = SECONDS_PER_MINUTE * MICROS_PER_SECOND;
  public static final long MICROS_PER_HOUR = MINUTES_PER_HOUR * MICROS_PER_MINUTE;
  public static final long MICROS_PER_DAY = HOURS_PER_DAY * MICROS_PER_HOUR;

  public static final long NANOS_PER_MICROS = 1000L;
  public static final long NANOS_PER_MILLIS = MICROS_PER_MILLIS * NANOS_PER_MICROS;
  public static final long NANOS_PER_SECOND = MILLIS_PER_SECOND * NANOS_PER_MILLIS;
}

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