Package org.apache.iceberg.util

Class SortOrderUtil

java.lang.Object

org.apache.iceberg.util.SortOrderUtil

public class SortOrderUtil
extends Object

Method Summary

Modifier and Type	Method	Description
static SortOrder	buildSortOrder(Schema schema, PartitionSpec spec, SortOrder sortOrder)	Build a final sort order that satisfies the clustering required by the partition spec.
static SortOrder	buildSortOrder(Table table)
static SortOrder	buildSortOrder(Table table, SortOrder sortOrder)
static Set<String>	orderPreservingSortedColumns(SortOrder sortOrder)

Methods inherited from class java.lang.Object

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

Method Details

buildSortOrder

public static SortOrder buildSortOrder(Table table)

buildSortOrder

public static SortOrder buildSortOrder(Table table,
 SortOrder sortOrder)

buildSortOrder

public static SortOrder buildSortOrder(Schema schema,
 PartitionSpec spec,
 SortOrder sortOrder)

Build a final sort order that satisfies the clustering required by the partition spec.

The incoming sort order may or may not satisfy the clustering needed by the partition spec. This modifies the sort order so that it clusters by partition and still produces the same order within each partition.

Parameters:

schema - a schema

spec - a partition spec

sortOrder - a sort order

Returns:

the sort order with additional sort fields to satisfy the clustering required by the spec

orderPreservingSortedColumns

public static Set<String> orderPreservingSortedColumns(SortOrder sortOrder)