Package org.apache.flink.table.operations

Class ShowDatabasesOperation

java.lang.Object

org.apache.flink.table.operations.ShowDatabasesOperation

All Implemented Interfaces:

ExecutableOperation, Operation, ShowOperation

public class ShowDatabasesOperation
extends Object
implements ShowOperation

Operation to describe a SHOW DATABASES statement.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.table.operations.ExecutableOperation

ExecutableOperation.Context

Constructor Summary

Constructors

Constructor	Description
ShowDatabasesOperation()

Method Summary

Modifier and Type	Method	Description
String	asSummaryString()	Returns a string that summarizes this operation for printing to a console.
TableResultInternal	execute(ExecutableOperation.Context ctx)	Executes the given operation and return the execution result.

Methods inherited from class java.lang.Object

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

Constructor Detail

ShowDatabasesOperation

public ShowDatabasesOperation()

Method Detail

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

execute

public TableResultInternal execute(ExecutableOperation.Context ctx)

Description copied from interface: ExecutableOperation

Executes the given operation and return the execution result.

Specified by:

execute in interface ExecutableOperation

Parameters:

ctx - the context to execute the operation.

Returns:

the content of the execution result.

See Also:

TableEnvironmentInternal.executeInternal(Operation)