org.apache.hadoop.hive.ql.io.orc

Class OrcUtils

java.lang.Object

org.apache.hadoop.hive.ql.io.orc.OrcUtils

public class OrcUtils
extends Object

Constructor Summary

Constructors

Constructor and Description
OrcUtils()

Method Summary

Methods

Modifier and Type	Method and Description
static int	getFlattenedColumnsCount(ObjectInspector inspector) Returns the number of columns after flatting complex types.
static boolean[]	includeColumns(String selectedColumns, String allColumns, ObjectInspector inspector) Returns selected columns as a boolean array with true value set for specified column names.

Methods inherited from class java.lang.Object

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

Constructor Detail

OrcUtils

public OrcUtils()

Method Detail

includeColumns

public static boolean[] includeColumns(String selectedColumns,
                       String allColumns,
                       ObjectInspector inspector)

Returns selected columns as a boolean array with true value set for specified column names. The result will contain number of elements equal to flattened number of columns. For example: selectedColumns - a,b,c allColumns - a,b,c,d If column c is a complex type, say list and other types are primitives then result will be [false, true, true, true, true, true, false] Index 0 is the root element of the struct which is set to false by default, index 1,2 corresponds to columns a and b. Index 3,4 correspond to column c which is list and index 5 correspond to column d. After flattening list gets 2 columns.

Parameters:

selectedColumns - - comma separated list of selected column names

allColumns - - comma separated list of all column names

inspector - - object inspector

Returns:

- boolean array with true value set for the specified column names

getFlattenedColumnsCount

public static int getFlattenedColumnsCount(ObjectInspector inspector)

Returns the number of columns after flatting complex types.

Parameters:

inspector - - object inspector

Returns: