org.apache.flink.table.operations

Class ProjectQueryOperation

java.lang.Object

org.apache.flink.table.operations.ProjectQueryOperation

All Implemented Interfaces:

Operation, QueryOperation

@Internal
public class ProjectQueryOperation
extends Object
implements QueryOperation

Table operation that computes new table using given Expressions from its input relational operation.

Constructor Summary

Constructors

Constructor and Description
ProjectQueryOperation(List<org.apache.flink.table.expressions.ResolvedExpression> projectList, QueryOperation child, org.apache.flink.table.api.TableSchema tableSchema)

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()
List<org.apache.flink.table.expressions.ResolvedExpression>	getProjectList()
org.apache.flink.table.api.TableSchema	getTableSchema() 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

ProjectQueryOperation

public ProjectQueryOperation(List<org.apache.flink.table.expressions.ResolvedExpression> projectList,
                             QueryOperation child,
                             org.apache.flink.table.api.TableSchema tableSchema)

Method Detail

getProjectList

public List<org.apache.flink.table.expressions.ResolvedExpression> getProjectList()

getTableSchema

public org.apache.flink.table.api.TableSchema getTableSchema()

Description copied from interface: QueryOperation

Resolved schema of this operation.

Specified by:

getTableSchema 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