org.apache.flink.table.factories

接口 DynamicTableFactory.Context

所有已知实现类:

FactoryUtil.DefaultDynamicTableContext

封闭接口:

DynamicTableFactory

public static interface DynamicTableFactory.Context

Provides catalog and session information describing the dynamic table to be accessed.

方法概要

限定符和类型	方法和说明
ResolvedCatalogTable	getCatalogTable() Returns the resolved table information received from the Catalog.
ClassLoader	getClassLoader() Returns the class loader of the current session.
org.apache.flink.configuration.ReadableConfig	getConfiguration() Gives read-only access to the configuration of the current session.
ObjectIdentifier	getObjectIdentifier() Returns the identifier of the table in the Catalog.
boolean	isTemporary() Whether the table is temporary.

方法详细资料

getObjectIdentifier

ObjectIdentifier getObjectIdentifier()

Returns the identifier of the table in the Catalog.

getCatalogTable

ResolvedCatalogTable getCatalogTable()

Returns the resolved table information received from the Catalog.

The ResolvedCatalogTable forwards the metadata from the catalog but offers a validated ResolvedSchema. The original metadata object is available via ResolvedCatalogTable.getOrigin().

In most cases, a factory is interested in the following two characteristics:

 // get the physical data type to initialize the connector
 context.getCatalogTable().getResolvedSchema().toPhysicalRowDataType()

 // get primary key information if the connector supports upserts
 context.getCatalogTable().getResolvedSchema().getPrimaryKey()
 

Other characteristics such as metadata columns or watermarks will be pushed down into the created DynamicTableSource or DynamicTableSink during planning depending on the implemented ability interfaces.

getConfiguration

org.apache.flink.configuration.ReadableConfig getConfiguration()

Gives read-only access to the configuration of the current session.

getClassLoader

ClassLoader getClassLoader()

Returns the class loader of the current session.

The class loader is in particular useful for discovering further (nested) factories.

isTemporary

boolean isTemporary()

Whether the table is temporary.