org.apache.flink.table.operations

Class AggregateQueryOperation

java.lang.Object

org.apache.flink.table.operations.AggregateQueryOperation

All Implemented Interfaces:

Operation, QueryOperation

@Internal
public class AggregateQueryOperation
extends Object
implements QueryOperation

Relational operation that performs computations on top of subsets of input rows grouped by key.

Constructor Summary

Constructors

Constructor and Description
AggregateQueryOperation(List<ResolvedExpression> groupingExpressions, List<ResolvedExpression> aggregateExpressions, QueryOperation child, ResolvedSchema resolvedSchema)

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<ResolvedExpression>	getAggregateExpressions()
List<QueryOperation>	getChildren()
List<ResolvedExpression>	getGroupingExpressions()
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

AggregateQueryOperation

public AggregateQueryOperation(List<ResolvedExpression> groupingExpressions,
                               List<ResolvedExpression> aggregateExpressions,
                               QueryOperation child,
                               ResolvedSchema resolvedSchema)

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

getGroupingExpressions

public List<ResolvedExpression> getGroupingExpressions()

getAggregateExpressions

public List<ResolvedExpression> getAggregateExpressions()

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