org.apache.carbondata.datamap.bloom

Class DataConvertUtil

java.lang.Object

org.apache.carbondata.datamap.bloom.DataConvertUtil

public class DataConvertUtil
extends Object

Constructor Summary

Constructors

Constructor and Description
DataConvertUtil()

Method Summary

Modifier and Type	Method and Description
static Object	getNullValueForMeasure(DataType dataType, int scale) return default null value based on datatype.
static byte[]	getRawBytes(byte[] lvData) get raw bytes from LV structure, L is short encoded
static byte[]	getRawBytesForVarchar(byte[] lvData) get raw bytes from LV structure, L is int encoded

Methods inherited from class java.lang.Object

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

Constructor Detail

DataConvertUtil

public DataConvertUtil()

Method Detail

getRawBytes

public static byte[] getRawBytes(byte[] lvData)

get raw bytes from LV structure, L is short encoded

getRawBytesForVarchar

public static byte[] getRawBytesForVarchar(byte[] lvData)

get raw bytes from LV structure, L is int encoded

getNullValueForMeasure

public static Object getNullValueForMeasure(DataType dataType,
                                            int scale)

return default null value based on datatype. This method refers to ColumnPage.putNull Note: since we can not mark NULL with corresponding data type in bloom datamap we set/get a `NullValue` for NULL, such that pruning using bloom filter will have false positive case if filter value is the `NullValue`. This should not affect the correctness of result