org.apache.flink.table.operations

Class DistinctQueryOperation

java.lang.Object

org.apache.flink.table.operations.DistinctQueryOperation

All Implemented Interfaces:

Operation, QueryOperation

@Internal
public class DistinctQueryOperation
extends Object
implements QueryOperation

Removes duplicated rows of underlying relational operation.

Constructor Summary

Constructors

Constructor and Description
DistinctQueryOperation(QueryOperation child)

Method Summary

Modifier and Type	Method and Description
<T> T	accept(QueryOperationVisitor<T> visitor)
String	asSummaryString() Returns a string that summarizes this operation for printing to a console.
List<QueryOperation>	getChildren()
ResolvedSchema	getResolvedSchema() Resolved schema of this operation.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.table.operations.QueryOperation

asSerializableString

Constructor Detail

DistinctQueryOperation

public DistinctQueryOperation(QueryOperation child)

Method Detail

getResolvedSchema

public ResolvedSchema getResolvedSchema()

Description copied from interface: QueryOperation

Resolved schema of this operation.

Specified by:

getResolvedSchema in interface QueryOperation

asSummaryString

public String asSummaryString()

Description copied from interface: Operation

Returns a string that summarizes this operation for printing to a console. An implementation might skip very specific properties.

Specified by:

asSummaryString in interface Operation

Returns:

summary string of this operation for debugging purposes

getChildren

public List<QueryOperation> getChildren()

Specified by:

getChildren in interface QueryOperation

accept

public <T> T accept(QueryOperationVisitor<T> visitor)

Specified by:

accept in interface QueryOperation