org.apache.iotdb.db.query.udf.builtin

枚举 BuiltinFunction

java.lang.Object

java.lang.Enum<BuiltinFunction>

org.apache.iotdb.db.query.udf.builtin.BuiltinFunction

所有已实现的接口:

Serializable, Comparable<BuiltinFunction>

public enum BuiltinFunction
extends Enum<BuiltinFunction>

All built-in UDFs need to register their function names and classes here.

枚举常量概要

枚举常量

枚举常量和说明
ABS
ACOS
ASIN
ATAN
BOTTOM_K
CAST
CEIL
CONST
COS
COSH
DEGREES
DERIVATIVE
DIFFERENCE
E
EXP
FLOOR
IN_RANGE
LN
LOG10
NON_NEGATIVE_DERIVATIVE
NON_NEGATIVE_DIFFERENCE
NON_ZERO_COUNT
NON_ZERO_DURATION
ON_OFF
PI
RADIANS
ROUND
SIGN
SIN
SINH
SQRT
STRING_CONTAINS
STRING_MATCHES
TAN
TANH
TIME_DIFFERENCE
TOP_K
ZERO_COUNT
ZERO_DURATION

方法概要

限定符和类型	方法和说明
String	getClassName()
Class<?>	getFunctionClass()
String	getFunctionName()
static BuiltinFunction	valueOf(String name) 返回带有指定名称的该类型的枚举常量。
static BuiltinFunction[]	values() 按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。

从类继承的方法 java.lang.Enum

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

从类继承的方法 java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

枚举常量详细资料

CONST

public static final BuiltinFunction CONST

E

public static final BuiltinFunction E

PI

public static final BuiltinFunction PI

SIN

public static final BuiltinFunction SIN

COS

public static final BuiltinFunction COS

TAN

public static final BuiltinFunction TAN

ASIN

public static final BuiltinFunction ASIN

ACOS

public static final BuiltinFunction ACOS

ATAN

public static final BuiltinFunction ATAN

SINH

public static final BuiltinFunction SINH

COSH

public static final BuiltinFunction COSH

TANH

public static final BuiltinFunction TANH

DEGREES

public static final BuiltinFunction DEGREES

RADIANS

public static final BuiltinFunction RADIANS

ABS

public static final BuiltinFunction ABS

SIGN

public static final BuiltinFunction SIGN

CEIL

public static final BuiltinFunction CEIL

FLOOR

public static final BuiltinFunction FLOOR

ROUND

public static final BuiltinFunction ROUND

EXP

public static final BuiltinFunction EXP

LN

public static final BuiltinFunction LN

LOG10

public static final BuiltinFunction LOG10

SQRT

public static final BuiltinFunction SQRT

STRING_CONTAINS

public static final BuiltinFunction STRING_CONTAINS

STRING_MATCHES

public static final BuiltinFunction STRING_MATCHES

DIFFERENCE

public static final BuiltinFunction DIFFERENCE

NON_NEGATIVE_DIFFERENCE

public static final BuiltinFunction NON_NEGATIVE_DIFFERENCE

TIME_DIFFERENCE

public static final BuiltinFunction TIME_DIFFERENCE

DERIVATIVE

public static final BuiltinFunction DERIVATIVE

NON_NEGATIVE_DERIVATIVE

public static final BuiltinFunction NON_NEGATIVE_DERIVATIVE

TOP_K

public static final BuiltinFunction TOP_K

BOTTOM_K

public static final BuiltinFunction BOTTOM_K

CAST

public static final BuiltinFunction CAST

IN_RANGE

public static final BuiltinFunction IN_RANGE

ON_OFF

public static final BuiltinFunction ON_OFF

ZERO_DURATION

public static final BuiltinFunction ZERO_DURATION

NON_ZERO_DURATION

public static final BuiltinFunction NON_ZERO_DURATION

ZERO_COUNT

public static final BuiltinFunction ZERO_COUNT

NON_ZERO_COUNT

public static final BuiltinFunction NON_ZERO_COUNT

方法详细资料

values

public static BuiltinFunction[] values()

按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。该方法可用于迭代 常量, 如下所示:

for (BuiltinFunction c : BuiltinFunction.values())
    System.out.println(c);

返回:

按照声明该枚举类型的常量的顺序返回的包含这些常量的数组

valueOf

public static BuiltinFunction valueOf(String name)

返回带有指定名称的该类型的枚举常量。 字符串必须与用于声明该类型的枚举常量的 标识符完全匹配。(不允许有多余 的空格字符。)

参数:

name - 要返回的枚举常量的名称。

返回:

返回带有指定名称的枚举常量

抛出:

IllegalArgumentException - 如果该枚举类型没有带有指定名称的常量

NullPointerException - 如果参数为空值

getFunctionName

public String getFunctionName()

getFunctionClass

public Class<?> getFunctionClass()

getClassName

public String getClassName()