Package io.prestosql.spi.connector

Class RecordPageSource

java.lang.Object

io.prestosql.spi.connector.RecordPageSource

All Implemented Interfaces:

ConnectorPageSource, java.io.Closeable, java.lang.AutoCloseable

public class RecordPageSource
extends java.lang.Object
implements ConnectorPageSource

Field Summary

Fields inherited from interface io.prestosql.spi.connector.ConnectorPageSource

NOT_BLOCKED

Constructor Summary

Constructors

Constructor	Description
RecordPageSource(RecordSet recordSet)
RecordPageSource(java.util.List<Type> types, RecordCursor cursor)

Method Summary

Modifier and Type	Method	Description
void	close()	Immediately finishes this page source.
long	getCompletedBytes()	Gets the number of input bytes processed by this page source so far.
RecordCursor	getCursor()
Page	getNextPage()	Gets the next page of data.
long	getReadTimeNanos()	Gets the wall time this page source spent reading data from the input.
long	getSystemMemoryUsage()	Get the total memory that needs to be reserved in the general memory pool.
boolean	isFinished()	Will this page source product more pages?

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.prestosql.spi.connector.ConnectorPageSource

isBlocked

Constructor Detail

RecordPageSource

public RecordPageSource(RecordSet recordSet)

RecordPageSource

public RecordPageSource(java.util.List<Type> types,
                        RecordCursor cursor)

Method Detail

getCursor

public RecordCursor getCursor()

getCompletedBytes

public long getCompletedBytes()

Description copied from interface: ConnectorPageSource

Gets the number of input bytes processed by this page source so far. If size is not available, this method should return zero.

Specified by:

getCompletedBytes in interface ConnectorPageSource

getReadTimeNanos

public long getReadTimeNanos()

Description copied from interface: ConnectorPageSource

Gets the wall time this page source spent reading data from the input. If read time is not available, this method should return zero.

Specified by:

getReadTimeNanos in interface ConnectorPageSource

getSystemMemoryUsage

public long getSystemMemoryUsage()

Description copied from interface: ConnectorPageSource

Get the total memory that needs to be reserved in the general memory pool. This memory should include any buffers, etc. that are used for reading data.

Specified by:

getSystemMemoryUsage in interface ConnectorPageSource

Returns:

the memory used so far in table read

close

public void close()

Description copied from interface: ConnectorPageSource

Immediately finishes this page source. Presto will always call this method.

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface ConnectorPageSource

isFinished

public boolean isFinished()

Description copied from interface: ConnectorPageSource

Will this page source product more pages?

Specified by:

isFinished in interface ConnectorPageSource

getNextPage

public Page getNextPage()

Description copied from interface: ConnectorPageSource

Gets the next page of data. This method is allowed to return null.

Specified by:

getNextPage in interface ConnectorPageSource