org.apache.flink.table.sources

Class CsvTableSource.CsvLookupFunction

java.lang.Object

org.apache.flink.table.functions.UserDefinedFunction

org.apache.flink.table.functions.TableFunction<Row>

org.apache.flink.table.sources.CsvTableSource.CsvLookupFunction

All Implemented Interfaces:

Serializable, FunctionDefinition

Enclosing class:

CsvTableSource

@Internal
public static class CsvTableSource.CsvLookupFunction
extends TableFunction<Row>

LookupFunction to support lookup in CsvTableSource.

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
void	close() Tear-down method for user-defined function.
void	eval(Object... values)
TypeInformation<Row>	getResultType() Returns the result type of the evaluation method.
void	open(FunctionContext context) Setup method for user-defined function.

Methods inherited from class org.apache.flink.table.functions.TableFunction

collect, finish, getKind, getParameterTypes, getTypeInference, setCollector

Methods inherited from class org.apache.flink.table.functions.UserDefinedFunction

functionIdentifier, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.table.functions.FunctionDefinition

getRequirements, isDeterministic, supportsConstantFolding

Method Detail

getResultType

public TypeInformation<Row> getResultType()

Description copied from class: TableFunction

Returns the result type of the evaluation method.

Overrides:

getResultType in class TableFunction<Row>

open

public void open(FunctionContext context)
          throws Exception

Description copied from class: UserDefinedFunction

Setup method for user-defined function. It can be used for initialization work. By default, this method does nothing.

Overrides:

open in class UserDefinedFunction

Throws:

Exception

eval

public void eval(Object... values)

close

public void close()
           throws Exception

Description copied from class: UserDefinedFunction

Tear-down method for user-defined function. It can be used for clean up work. By default, this method does nothing.

Overrides:

close in class UserDefinedFunction

Throws:

Exception