Package org.apache.parquet.format

Enum SizeStatistics._Fields

java.lang.Object

java.lang.Enum<SizeStatistics._Fields>

org.apache.parquet.format.SizeStatistics._Fields

All Implemented Interfaces:

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

Enclosing class:

SizeStatistics

public static enum SizeStatistics._Fields
extends Enum<SizeStatistics._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
DEFINITION_LEVEL_HISTOGRAM	Same as repetition_level_histogram except for definition levels.
REPETITION_LEVEL_HISTOGRAM	When present, there is expected to be one element corresponding to each repetition (i.e. size=max repetition_level+1) where each element represents the number of times the repetition level was observed in the data.
UNENCODED_BYTE_ARRAY_DATA_BYTES	The number of physical bytes stored for BYTE_ARRAY data values assuming no encoding.

Method Summary

Modifier and Type	Method	Description
static SizeStatistics._Fields	findByName(String name)	Find the _Fields constant that matches name, or null if its not found.
static SizeStatistics._Fields	findByThriftId(int fieldId)	Find the _Fields constant that matches fieldId, or null if its not found.
static SizeStatistics._Fields	findByThriftIdOrThrow(int fieldId)	Find the _Fields constant that matches fieldId, throwing an exception if it is not found.
String	getFieldName()
short	getThriftFieldId()
static SizeStatistics._Fields	valueOf(String name)	Returns the enum constant of this type with the specified name.
static SizeStatistics._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

UNENCODED_BYTE_ARRAY_DATA_BYTES

public static final SizeStatistics._Fields UNENCODED_BYTE_ARRAY_DATA_BYTES

The number of physical bytes stored for BYTE_ARRAY data values assuming no encoding. This is exclusive of the bytes needed to store the length of each byte array. In other words, this field is equivalent to the `(size of PLAIN-ENCODING the byte array values) - (4 bytes * number of values written)`. To determine unencoded sizes of other types readers can use schema information multiplied by the number of non-null and null values. The number of null/non-null values can be inferred from the histograms below. For example, if a column chunk is dictionary-encoded with dictionary ["a", "bc", "cde"], and a data page contains the indices [0, 0, 1, 2], then this value for that data page should be 7 (1 + 1 + 2 + 3). This field should only be set for types that use BYTE_ARRAY as their physical type.

REPETITION_LEVEL_HISTOGRAM

public static final SizeStatistics._Fields REPETITION_LEVEL_HISTOGRAM

When present, there is expected to be one element corresponding to each repetition (i.e. size=max repetition_level+1) where each element represents the number of times the repetition level was observed in the data. This field may be omitted if max_repetition_level is 0 without loss of information.

DEFINITION_LEVEL_HISTOGRAM

public static final SizeStatistics._Fields DEFINITION_LEVEL_HISTOGRAM

Same as repetition_level_histogram except for definition levels. This field may be omitted if max_definition_level is 0 or 1 without loss of information.

Method Detail

values

public static SizeStatistics._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 (SizeStatistics._Fields c : SizeStatistics._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 SizeStatistics._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 SizeStatistics._Fields findByThriftId(int fieldId)

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

findByThriftIdOrThrow

public static SizeStatistics._Fields findByThriftIdOrThrow(int fieldId)

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

findByName

public static SizeStatistics._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