org.apache.flink.connector.jdbc.table

Class JdbcRowDataLookupFunction

java.lang.Object

org.apache.flink.table.functions.UserDefinedFunction

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

org.apache.flink.connector.jdbc.table.JdbcRowDataLookupFunction

All Implemented Interfaces:

Serializable, FunctionDefinition

@Internal
public class JdbcRowDataLookupFunction
extends TableFunction<RowData>

A lookup function for JdbcDynamicTableSource.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
JdbcRowDataLookupFunction(JdbcOptions options, JdbcLookupOptions lookupOptions, String[] fieldNames, DataType[] fieldTypes, String[] keyNames, RowType rowType)

Method Summary

Modifier and Type	Method and Description
void	close() Tear-down method for user-defined function.
void	eval(Object... keys) This is a lookup method which is called by Flink framework in runtime.
Connection	getDbConnection()
void	open(FunctionContext context) Setup method for user-defined function.

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

collect, getKind, getParameterTypes, getResultType, 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

JdbcRowDataLookupFunction

public JdbcRowDataLookupFunction(JdbcOptions options,
                                 JdbcLookupOptions lookupOptions,
                                 String[] fieldNames,
                                 DataType[] fieldTypes,
                                 String[] keyNames,
                                 RowType rowType)

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

eval

public void eval(Object... keys)

This is a lookup method which is called by Flink framework in runtime.

Parameters:

keys - lookup keys

close

public void close()
           throws IOException

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:

IOException

getDbConnection

@VisibleForTesting
public Connection getDbConnection()