org.apache.flink.table.operations

Class JoinQueryOperation

java.lang.Object

org.apache.flink.table.operations.JoinQueryOperation

All Implemented Interfaces:

Operation, QueryOperation

@Internal
public class JoinQueryOperation
extends Object
implements QueryOperation

Table operation that joins two relational operations based on given condition.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	JoinQueryOperation.JoinType Specifies how the two Tables should be joined.

Constructor Summary

Constructors

Constructor and Description
JoinQueryOperation(QueryOperation left, QueryOperation right, JoinQueryOperation.JoinType joinType, ResolvedExpression condition, boolean correlated)

Method Summary

Modifier and Type	Method and Description
<T> T	accept(QueryOperationVisitor<T> visitor)
String	asSerializableString() Returns a string that fully serializes this instance.
String	asSummaryString() Returns a string that summarizes this operation for printing to a console.
List<QueryOperation>	getChildren()
ResolvedExpression	getCondition()
JoinQueryOperation.JoinType	getJoinType()
ResolvedSchema	getResolvedSchema() Resolved schema of this operation.
boolean	isCorrelated()

Methods inherited from class java.lang.Object

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

Constructor Detail

JoinQueryOperation

public JoinQueryOperation(QueryOperation left,
                          QueryOperation right,
                          JoinQueryOperation.JoinType joinType,
                          ResolvedExpression condition,
                          boolean correlated)

Method Detail

getJoinType

public JoinQueryOperation.JoinType getJoinType()

getCondition

public ResolvedExpression getCondition()

isCorrelated

public boolean isCorrelated()

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

asSerializableString

public String asSerializableString()

Description copied from interface: QueryOperation

Returns a string that fully serializes this instance. The serialized string can be used for storing the query in e.g. a Catalog as a view.

Specified by:

asSerializableString in interface QueryOperation

Returns:

detailed string for persisting in a catalog

See Also:

Operation.asSummaryString()

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