io.prestosql.plugin.hive.util

Class Statistics

java.lang.Object

io.prestosql.plugin.hive.util.Statistics

public final class Statistics
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Statistics.ReduceOperator

Method Summary

Modifier and Type	Method and Description
static Map<List<String>,ComputedStatistics>	createComputedStatisticsToPartitionMap(Collection<ComputedStatistics> computedStatistics, List<String> partitionColumns, Map<String,Type> columnTypes)
static PartitionStatistics	createEmptyPartitionStatistics(Map<String,Type> columnTypes, Map<String,Set<ColumnStatisticType>> columnStatisticsMetadataTypes)
static Map<String,HiveColumnStatistics>	fromComputedStatistics(ConnectorSession session, org.joda.time.DateTimeZone timeZone, Map<ColumnStatisticMetadata,Block> computedStatistics, Map<String,Type> columnTypes, long rowCount)
static HiveColumnStatistics	merge(HiveColumnStatistics first, HiveColumnStatistics second)
static Map<String,HiveColumnStatistics>	merge(Map<String,HiveColumnStatistics> first, Map<String,HiveColumnStatistics> second)
static PartitionStatistics	merge(PartitionStatistics first, PartitionStatistics second)
static HiveBasicStatistics	reduce(HiveBasicStatistics first, HiveBasicStatistics second, Statistics.ReduceOperator operator)

Methods inherited from class java.lang.Object

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

Method Detail

merge

public static PartitionStatistics merge(PartitionStatistics first,
                                        PartitionStatistics second)

reduce

public static HiveBasicStatistics reduce(HiveBasicStatistics first,
                                         HiveBasicStatistics second,
                                         Statistics.ReduceOperator operator)

merge

public static Map<String,HiveColumnStatistics> merge(Map<String,HiveColumnStatistics> first,
                                                     Map<String,HiveColumnStatistics> second)

merge

public static HiveColumnStatistics merge(HiveColumnStatistics first,
                                         HiveColumnStatistics second)

createEmptyPartitionStatistics

public static PartitionStatistics createEmptyPartitionStatistics(Map<String,Type> columnTypes,
                                                                 Map<String,Set<ColumnStatisticType>> columnStatisticsMetadataTypes)

createComputedStatisticsToPartitionMap

public static Map<List<String>,ComputedStatistics> createComputedStatisticsToPartitionMap(Collection<ComputedStatistics> computedStatistics,
                                                                                          List<String> partitionColumns,
                                                                                          Map<String,Type> columnTypes)

fromComputedStatistics

public static Map<String,HiveColumnStatistics> fromComputedStatistics(ConnectorSession session,
                                                                      org.joda.time.DateTimeZone timeZone,
                                                                      Map<ColumnStatisticMetadata,Block> computedStatistics,
                                                                      Map<String,Type> columnTypes,
                                                                      long rowCount)