org.apache.hadoop.hive.ql.util

Class TimestampUtils

java.lang.Object

org.apache.hadoop.hive.ql.util.TimestampUtils

public class TimestampUtils
extends Object

Utilities for Timestamps and the relevant conversions.

Field Summary

Fields

Modifier and Type	Field and Description
static BigDecimal	BILLION_BIG_DECIMAL

Constructor Summary

Constructors

Constructor and Description
TimestampUtils()

Method Summary

Modifier and Type	Method and Description
static Timestamp	decimalToTimestamp(HiveDecimal dec) Take a HiveDecimal and return the timestamp representation where the fraction part is the nanoseconds and integer part is the number of seconds.
static Timestamp	decimalToTimestamp(HiveDecimalV1 dec)
static Timestamp	decimalToTimestamp(HiveDecimalWritable decWritable, HiveDecimalWritable scratchDecWritable1, HiveDecimalWritable scratchDecWritable2) Take a HiveDecimalWritable and return the timestamp representation where the fraction part is the nanoseconds and integer part is the number of seconds.
static Timestamp	doubleToTimestamp(double f)
static double	getDouble(Timestamp ts) Convert the timestamp to a double measured in seconds.
static long	millisToSeconds(long millis) Rounds the number of milliseconds relative to the epoch down to the nearest whole number of seconds.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

BILLION_BIG_DECIMAL

public static final BigDecimal BILLION_BIG_DECIMAL

Constructor Detail

TimestampUtils

public TimestampUtils()

Method Detail

getDouble

public static double getDouble(Timestamp ts)

Convert the timestamp to a double measured in seconds.

Returns:

double representation of the timestamp, accurate to nanoseconds

doubleToTimestamp

public static Timestamp doubleToTimestamp(double f)

decimalToTimestamp

public static Timestamp decimalToTimestamp(HiveDecimal dec)

Take a HiveDecimal and return the timestamp representation where the fraction part is the nanoseconds and integer part is the number of seconds.

Parameters:

dec -

Returns:

decimalToTimestamp

public static Timestamp decimalToTimestamp(HiveDecimalWritable decWritable,
                                           HiveDecimalWritable scratchDecWritable1,
                                           HiveDecimalWritable scratchDecWritable2)

Take a HiveDecimalWritable and return the timestamp representation where the fraction part is the nanoseconds and integer part is the number of seconds. This is a HiveDecimalWritable variation with supplied scratch objects.

Parameters:

decWritable -

scratchDecWritable1 -

scratchDecWritable2 -

Returns:

decimalToTimestamp

public static Timestamp decimalToTimestamp(HiveDecimalV1 dec)

millisToSeconds

public static long millisToSeconds(long millis)

Rounds the number of milliseconds relative to the epoch down to the nearest whole number of seconds. 500 would round to 0, -500 would round to -1.