org.apache.flink.table.descriptors

类 Schema

java.lang.Object

org.apache.flink.table.descriptors.Schema

所有已实现的接口:

Descriptor

@PublicEvolving
public class Schema
extends Object
implements Descriptor

Describes a schema of a table.

Note: Field names are matched by the exact name by default (case sensitive).

字段概要

字段

限定符和类型	字段和说明
static String	SCHEMA
static String	SCHEMA_DATA_TYPE
static String	SCHEMA_FROM
static String	SCHEMA_NAME
static String	SCHEMA_PROCTIME
static String	SCHEMA_TYPE 已过时。 Schema uses the legacy type key (e.g. schema.0.type = LONG) to store type information in prior v1.9. Since v1.10, Schema uses data type key (e.g. schema.0.data-type = BIGINT) to store types.

构造器概要

构造器

构造器和说明
Schema()

方法概要

限定符和类型	方法和说明
Schema	field(String fieldName, DataType fieldType) Adds a field with the field name and the data type.
Schema	field(String fieldName, String fieldType) Adds a field with the field name and the type string.
Schema	field(String fieldName, org.apache.flink.api.common.typeinfo.TypeInformation<?> fieldType) 已过时。 This method will be removed in future versions as it uses the old type system. Please use field(String, DataType) instead.
Schema	from(String originFieldName) Specifies the origin of the previously defined field.
Schema	proctime() Specifies the previously defined field as a processing-time attribute.
Schema	rowtime(Rowtime rowtime) Specifies the previously defined field as an event-time attribute.
Schema	schema(TableSchema schema) Sets the schema with field names and the types.
Map<String,String>	toProperties() Converts this descriptor into a set of properties.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

SCHEMA

public static final String SCHEMA

另请参阅:

常量字段值

SCHEMA_NAME

public static final String SCHEMA_NAME

另请参阅:

常量字段值

SCHEMA_TYPE

@Deprecated
public static final String SCHEMA_TYPE

已过时。 Schema uses the legacy type key (e.g. schema.0.type = LONG) to store type information in prior v1.9. Since v1.10, Schema uses data type key (e.g. schema.0.data-type = BIGINT) to store types.

另请参阅:

常量字段值

SCHEMA_DATA_TYPE

public static final String SCHEMA_DATA_TYPE

另请参阅:

常量字段值

SCHEMA_PROCTIME

public static final String SCHEMA_PROCTIME

另请参阅:

常量字段值

SCHEMA_FROM

public static final String SCHEMA_FROM

另请参阅:

常量字段值

构造器详细资料

Schema

public Schema()

方法详细资料

schema

public Schema schema(TableSchema schema)

Sets the schema with field names and the types. Required.

This method overwrites existing fields added with field(String, DataType).

参数:

schema - the table schema

field

public Schema field(String fieldName,
                    DataType fieldType)

Adds a field with the field name and the data type. Required. This method can be called multiple times. The call order of this method defines also the order of the fields in a row.

参数:

fieldName - the field name

fieldType - the type information of the field

field

@Deprecated
public Schema field(String fieldName,
                                org.apache.flink.api.common.typeinfo.TypeInformation<?> fieldType)

已过时。 This method will be removed in future versions as it uses the old type system. Please use field(String, DataType) instead.

Adds a field with the field name and the type information. Required. This method can be called multiple times. The call order of this method defines also the order of the fields in a row.

参数:

fieldName - the field name

fieldType - the type information of the field

field

public Schema field(String fieldName,
                    String fieldType)

Adds a field with the field name and the type string. Required. This method can be called multiple times. The call order of this method defines also the order of the fields in a row.

NOTE: the fieldType string should follow the type string defined in LogicalTypeParser. This method also keeps compatible with old type string defined in TypeStringUtils but will be dropped in future versions as it uses the old type system.

参数:

fieldName - the field name

fieldType - the type string of the field

from

public Schema from(String originFieldName)

Specifies the origin of the previously defined field. The origin field is defined by a connector or format.

E.g. field("myString", Types.STRING).from("CSV_MY_STRING")

Note: Field names are matched by the exact name by default (case sensitive).

proctime

public Schema proctime()

Specifies the previously defined field as a processing-time attribute.

E.g. field("proctime", Types.SQL_TIMESTAMP).proctime()

rowtime

public Schema rowtime(Rowtime rowtime)

Specifies the previously defined field as an event-time attribute.

E.g. field("rowtime", Types.SQL_TIMESTAMP).rowtime(...)

toProperties

public Map<String,String> toProperties()

Converts this descriptor into a set of properties.

指定者:

toProperties 在接口中 Descriptor