org.apache.flink.connectors.hive

Class FileSystemLookupFunction<P>

java.lang.Object

org.apache.flink.table.functions.UserDefinedFunction

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

org.apache.flink.connectors.hive.FileSystemLookupFunction<P>

All Implemented Interfaces:

Serializable, FunctionDefinition

public class FileSystemLookupFunction<P>
extends TableFunction<RowData>

Lookup function for filesystem connector tables.

The hive connector and filesystem connector share read/write files code. Currently, this function only used in hive connector.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
FileSystemLookupFunction(PartitionFetcher<P> partitionFetcher, PartitionFetcher.Context<P> fetcherContext, PartitionReader<P,RowData> partitionReader, RowType rowType, int[] lookupKeys, Duration reloadInterval)

Method Summary

Modifier and Type	Method and Description
void	close() Tear-down method for user-defined function.
void	eval(Object... values)
PartitionFetcher.Context<P>	getFetcherContext()
PartitionFetcher<P>	getPartitionFetcher()
PartitionReader<P,RowData>	getPartitionReader()
Duration	getReloadInterval()
TypeInformation<RowData>	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

Constructor Detail

FileSystemLookupFunction

public FileSystemLookupFunction(PartitionFetcher<P> partitionFetcher,
                                PartitionFetcher.Context<P> fetcherContext,
                                PartitionReader<P,RowData> partitionReader,
                                RowType rowType,
                                int[] lookupKeys,
                                Duration reloadInterval)

Method Detail

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

getResultType

public TypeInformation<RowData> getResultType()

Description copied from class: TableFunction

Returns the result type of the evaluation method.

Overrides:

getResultType in class TableFunction<RowData>

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

getReloadInterval

@VisibleForTesting
public Duration getReloadInterval()

getPartitionFetcher

@VisibleForTesting
public PartitionFetcher<P> getPartitionFetcher()

getFetcherContext

@VisibleForTesting
public PartitionFetcher.Context<P> getFetcherContext()

getPartitionReader

@VisibleForTesting
public PartitionReader<P,RowData> getPartitionReader()