Package org.apache.iotdb.commons.udf.builtin

Enum BuiltinAggregationFunction

java.lang.Object

java.lang.Enum<BuiltinAggregationFunction>

org.apache.iotdb.commons.udf.builtin.BuiltinAggregationFunction

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<BuiltinAggregationFunction>

public enum BuiltinAggregationFunction
extends java.lang.Enum<BuiltinAggregationFunction>

Enum Constant Summary

Enum Constants

Enum Constant	Description
AVG
COUNT
COUNT_IF
EXTREME
FIRST_VALUE
LAST_VALUE
MAX_TIME
MAX_VALUE
MIN_TIME
MIN_VALUE
SUM

Method Summary

Modifier and Type	Method	Description
static boolean	canSplitToMultiPhases(java.lang.String name)
static boolean	canUseStatistics(java.lang.String name)
java.lang.String	getFunctionName()
static java.util.Set<java.lang.String>	getNativeFunctionNames()
static BuiltinAggregationFunction	valueOf(java.lang.String name)	Returns the enum constant of this type with the specified name.
static BuiltinAggregationFunction[]	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

MIN_TIME

public static final BuiltinAggregationFunction MIN_TIME

MAX_TIME

public static final BuiltinAggregationFunction MAX_TIME

MAX_VALUE

public static final BuiltinAggregationFunction MAX_VALUE

MIN_VALUE

public static final BuiltinAggregationFunction MIN_VALUE

EXTREME

public static final BuiltinAggregationFunction EXTREME

FIRST_VALUE

public static final BuiltinAggregationFunction FIRST_VALUE

LAST_VALUE

public static final BuiltinAggregationFunction LAST_VALUE

COUNT

public static final BuiltinAggregationFunction COUNT

AVG

public static final BuiltinAggregationFunction AVG

SUM

public static final BuiltinAggregationFunction SUM

COUNT_IF

public static final BuiltinAggregationFunction COUNT_IF

Method Detail

values

public static BuiltinAggregationFunction[] 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 (BuiltinAggregationFunction c : BuiltinAggregationFunction.values())
    System.out.println(c);

Returns:

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

valueOf

public static BuiltinAggregationFunction valueOf(java.lang.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:

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

java.lang.NullPointerException - if the argument is null

getFunctionName

public java.lang.String getFunctionName()

getNativeFunctionNames

public static java.util.Set<java.lang.String> getNativeFunctionNames()

canUseStatistics

public static boolean canUseStatistics(java.lang.String name)

Returns:

if the Aggregation can use statistics to optimize

canSplitToMultiPhases

public static boolean canSplitToMultiPhases(java.lang.String name)

Returns:

if the Aggregation can split to multi phases