org.apache.drill.exec.store.parquet

Class ParquetReaderUtility.NanoTimeUtils

java.lang.Object

org.apache.drill.exec.store.parquet.ParquetReaderUtility.NanoTimeUtils

Enclosing class:

ParquetReaderUtility

public static class ParquetReaderUtility.NanoTimeUtils
extends Object

Utilities for converting from parquet INT96 binary (impala, hive timestamp) to date time value. This utilizes the Joda library.

Field Summary

Fields

Modifier and Type	Field and Description
static long	NANOS_PER_MILLISECOND

Constructor Summary

Constructors

Constructor and Description
NanoTimeUtils()

Method Summary

Modifier and Type	Method and Description
static long	getDateTimeValueFromBinary(org.apache.parquet.io.api.Binary binaryTimeStampValue, boolean retainLocalTimezone)

Methods inherited from class java.lang.Object

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

Field Detail

NANOS_PER_MILLISECOND

public static final long NANOS_PER_MILLISECOND

See Also:

Constant Field Values

Constructor Detail

NanoTimeUtils

public NanoTimeUtils()

Method Detail

getDateTimeValueFromBinary

public static long getDateTimeValueFromBinary(org.apache.parquet.io.api.Binary binaryTimeStampValue,
                                              boolean retainLocalTimezone)

Parameters:

binaryTimeStampValue - hive, impala timestamp values with nanoseconds precision are stored in parquet Binary as INT96 (12 constant bytes)

retainLocalTimezone - parquet files don't keep local timeZone according to the Parquet spec, but some tools (hive, for example) retain local timezone for parquet files by default Note: Impala doesn't retain local timezone by default

Returns:

Timestamp in milliseconds - the number of milliseconds since January 1, 1970, 00:00:00 GMT represented by @param binaryTimeStampValue. The nanos precision is cut to millis. Therefore the length of single timestamp value is 8 bytes instead of 12 bytes.