Package org.apache.parquet.format

Enum Statistics._Fields

java.lang.Object

java.lang.Enum<Statistics._Fields>

org.apache.parquet.format.Statistics._Fields

All Implemented Interfaces:

Serializable, Comparable<Statistics._Fields>, org.apache.thrift.TFieldIdEnum

Enclosing class:

Statistics

public static enum Statistics._Fields
extends Enum<Statistics._Fields>
implements org.apache.thrift.TFieldIdEnum

The set of fields this struct contains, along with convenience methods for finding and manipulating them.

Enum Constant Summary

Enum Constants

Enum Constant	Description
DISTINCT_COUNT	count of distinct values occurring
IS_MAX_VALUE_EXACT	If true, max_value is the actual maximum value for a column
IS_MIN_VALUE_EXACT	If true, min_value is the actual minimum value for a column
MAX	DEPRECATED: min and max value of the column.
MAX_VALUE	Lower and upper bound values for the column, determined by its ColumnOrder.
MIN
MIN_VALUE
NULL_COUNT	Count of null values in the column.

Method Summary

Modifier and Type	Method	Description
static Statistics._Fields	findByName(String name)	Find the _Fields constant that matches name, or null if its not found.
static Statistics._Fields	findByThriftId(int fieldId)	Find the _Fields constant that matches fieldId, or null if its not found.
static Statistics._Fields	findByThriftIdOrThrow(int fieldId)	Find the _Fields constant that matches fieldId, throwing an exception if it is not found.
String	getFieldName()
short	getThriftFieldId()
static Statistics._Fields	valueOf(String name)	Returns the enum constant of this type with the specified name.
static Statistics._Fields[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

MAX

public static final Statistics._Fields MAX

DEPRECATED: min and max value of the column. Use min_value and max_value. Values are encoded using PLAIN encoding, except that variable-length byte arrays do not include a length prefix. These fields encode min and max values determined by signed comparison only. New files should use the correct order for a column's logical type and store the values in the min_value and max_value fields. To support older readers, these may be set when the column order is signed.

MIN

public static final Statistics._Fields MIN

NULL_COUNT

public static final Statistics._Fields NULL_COUNT

Count of null values in the column. Writers SHOULD always write this field even if it is zero (i.e. no null value) or the column is not nullable. Readers MUST distinguish between null_count not being present and null_count == 0. If null_count is not present, readers MUST NOT assume null_count == 0.

DISTINCT_COUNT

public static final Statistics._Fields DISTINCT_COUNT

count of distinct values occurring

MAX_VALUE

public static final Statistics._Fields MAX_VALUE

Lower and upper bound values for the column, determined by its ColumnOrder. These may be the actual minimum and maximum values found on a page or column chunk, but can also be (more compact) values that do not exist on a page or column chunk. For example, instead of storing "Blart Versenwald III", a writer may set min_value="B", max_value="C". Such more compact values must still be valid values within the column's logical type. Values are encoded using PLAIN encoding, except that variable-length byte arrays do not include a length prefix.

MIN_VALUE

public static final Statistics._Fields MIN_VALUE

IS_MAX_VALUE_EXACT

public static final Statistics._Fields IS_MAX_VALUE_EXACT

If true, max_value is the actual maximum value for a column

IS_MIN_VALUE_EXACT

public static final Statistics._Fields IS_MIN_VALUE_EXACT

If true, min_value is the actual minimum value for a column

Method Detail

values

public static Statistics._Fields[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (Statistics._Fields c : Statistics._Fields.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static Statistics._Fields valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

findByThriftId

public static Statistics._Fields findByThriftId(int fieldId)

Find the _Fields constant that matches fieldId, or null if its not found.

findByThriftIdOrThrow

public static Statistics._Fields findByThriftIdOrThrow(int fieldId)

Find the _Fields constant that matches fieldId, throwing an exception if it is not found.

findByName

public static Statistics._Fields findByName(String name)

Find the _Fields constant that matches name, or null if its not found.

getThriftFieldId

public short getThriftFieldId()

Specified by:

getThriftFieldId in interface org.apache.thrift.TFieldIdEnum

getFieldName

public String getFieldName()

Specified by:

getFieldName in interface org.apache.thrift.TFieldIdEnum