org.apache.flink.table.sources

接口 LookupableTableSource<T>

类型参数:

T - type of the result

所有超级接口:

TableSource<T>

已过时。

This interface will not be supported in the new source design around DynamicTableSource which only works with the Blink planner. Use LookupTableSource instead. See FLIP-95 for more information.

@Deprecated
 @Experimental
public interface LookupableTableSource<T>
extends TableSource<T>

A TableSource which supports for lookup accessing via key column(s). For example, MySQL TableSource can implement this interface to support lookup accessing. When temporal join this MySQL table, the runtime behavior could be in a lookup fashion.

方法概要

限定符和类型	方法和说明
AsyncTableFunction<T>	getAsyncLookupFunction(String[] lookupKeys) 已过时。 Gets the AsyncTableFunction which supports async lookup one key at a time.
TableFunction<T>	getLookupFunction(String[] lookupKeys) 已过时。 Gets the TableFunction which supports lookup one key at a time.
boolean	isAsyncEnabled() 已过时。 Returns true if async lookup is enabled.

从接口继承的方法 org.apache.flink.table.sources.TableSource

explainSource, getProducedDataType, getReturnType, getTableSchema

方法详细资料

getLookupFunction

TableFunction<T> getLookupFunction(String[] lookupKeys)

已过时。

Gets the TableFunction which supports lookup one key at a time.

参数:

lookupKeys - the chosen field names as lookup keys, it is in the defined order

getAsyncLookupFunction

AsyncTableFunction<T> getAsyncLookupFunction(String[] lookupKeys)

已过时。

Gets the AsyncTableFunction which supports async lookup one key at a time.

参数:

lookupKeys - the chosen field names as lookup keys, it is in the defined order

isAsyncEnabled

boolean isAsyncEnabled()

已过时。

Returns true if async lookup is enabled.

The lookup function returned by getAsyncLookupFunction(String[]) will be used if returns true. Otherwise, the lookup function returned by getLookupFunction(String[]) will be used.