org.apache.flink.table.types.logical

枚举 LogicalTypeRoot

java.lang.Object

java.lang.Enum<LogicalTypeRoot>

org.apache.flink.table.types.logical.LogicalTypeRoot

所有已实现的接口:

Serializable, Comparable<LogicalTypeRoot>

@PublicEvolving
public enum LogicalTypeRoot
extends Enum<LogicalTypeRoot>

An enumeration of logical type roots containing static information about logical data types.

A root is an essential description of a LogicalType without additional parameters. For example, a parameterized logical type DECIMAL(12,3) possesses all characteristics of its root DECIMAL. Additionally, a logical type root enables efficient comparison during the evaluation of types.

The enumeration is very close to the SQL standard in terms of naming and completeness. However, it reflects just a subset of the evolving standard and contains some extensions (such as NULL, SYMBOL, or RAW).

See the type-implementing classes for a more detailed description of each type.

Note to implementers: Whenever we perform a match against a type root (e.g. using a switch/case statement), it is recommended to:

• Order the items by the type root definition in this class for easy readability.
• Think about the behavior of all type roots for the implementation. A default fallback is dangerous when introducing a new type root in the future.
• In many runtime cases, resolve the indirection of DISTINCT_TYPE: return myMethod(((DistinctType) type).getSourceType)

枚举常量概要

枚举常量

枚举常量和说明
ARRAY
BIGINT
BINARY
BOOLEAN
CHAR
DATE
DECIMAL
DISTINCT_TYPE
DOUBLE
FLOAT
INTEGER
INTERVAL_DAY_TIME
INTERVAL_YEAR_MONTH
MAP
MULTISET
NULL
RAW
ROW
SMALLINT
STRUCTURED_TYPE
SYMBOL
TIME_WITHOUT_TIME_ZONE
TIMESTAMP_WITH_LOCAL_TIME_ZONE
TIMESTAMP_WITH_TIME_ZONE
TIMESTAMP_WITHOUT_TIME_ZONE
TINYINT
UNRESOLVED
VARBINARY
VARCHAR

方法概要

限定符和类型	方法和说明
Set<LogicalTypeFamily>	getFamilies()
static LogicalTypeRoot	valueOf(String name) 返回带有指定名称的该类型的枚举常量。
static LogicalTypeRoot[]	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

CHAR

public static final LogicalTypeRoot CHAR

VARCHAR

public static final LogicalTypeRoot VARCHAR

BOOLEAN

public static final LogicalTypeRoot BOOLEAN

BINARY

public static final LogicalTypeRoot BINARY

VARBINARY

public static final LogicalTypeRoot VARBINARY

DECIMAL

public static final LogicalTypeRoot DECIMAL

TINYINT

public static final LogicalTypeRoot TINYINT

SMALLINT

public static final LogicalTypeRoot SMALLINT

INTEGER

public static final LogicalTypeRoot INTEGER

BIGINT

public static final LogicalTypeRoot BIGINT

FLOAT

public static final LogicalTypeRoot FLOAT

DOUBLE

public static final LogicalTypeRoot DOUBLE

DATE

public static final LogicalTypeRoot DATE

TIME_WITHOUT_TIME_ZONE

public static final LogicalTypeRoot TIME_WITHOUT_TIME_ZONE

TIMESTAMP_WITHOUT_TIME_ZONE

public static final LogicalTypeRoot TIMESTAMP_WITHOUT_TIME_ZONE

TIMESTAMP_WITH_TIME_ZONE

public static final LogicalTypeRoot TIMESTAMP_WITH_TIME_ZONE

TIMESTAMP_WITH_LOCAL_TIME_ZONE

public static final LogicalTypeRoot TIMESTAMP_WITH_LOCAL_TIME_ZONE

INTERVAL_YEAR_MONTH

public static final LogicalTypeRoot INTERVAL_YEAR_MONTH

INTERVAL_DAY_TIME

public static final LogicalTypeRoot INTERVAL_DAY_TIME

ARRAY

public static final LogicalTypeRoot ARRAY

MULTISET

public static final LogicalTypeRoot MULTISET

MAP

public static final LogicalTypeRoot MAP

ROW

public static final LogicalTypeRoot ROW

DISTINCT_TYPE

public static final LogicalTypeRoot DISTINCT_TYPE

STRUCTURED_TYPE

public static final LogicalTypeRoot STRUCTURED_TYPE

NULL

public static final LogicalTypeRoot NULL

RAW

public static final LogicalTypeRoot RAW

SYMBOL

public static final LogicalTypeRoot SYMBOL

UNRESOLVED

public static final LogicalTypeRoot UNRESOLVED

方法详细资料

values

public static LogicalTypeRoot[] 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 (LogicalTypeRoot c : LogicalTypeRoot.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 LogicalTypeRoot 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

getFamilies

public Set<LogicalTypeFamily> getFamilies()