com.aliyun.odps.tunnel.io

Class ArrowTunnelRecordReader

java.lang.Object

com.aliyun.odps.tunnel.io.ArrowTunnelRecordReader

All Implemented Interfaces:

ArrowRecordReader, Closeable, AutoCloseable

public class ArrowTunnelRecordReader
extends Object
implements ArrowRecordReader

Constructor Summary

Constructors

Constructor and Description
ArrowTunnelRecordReader(long start, long count, List<Column> columns, com.aliyun.odps.rest.RestClient tunnelRestClient, TableTunnel.DownloadSession session, org.apache.arrow.memory.BufferAllocator allocator, CompressOption compress)

Method Summary

Modifier and Type	Method and Description
void	close()
org.apache.arrow.vector.VectorSchemaRoot	read() 读取一个batch的记录

Methods inherited from class java.lang.Object

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

Constructor Detail

ArrowTunnelRecordReader

public ArrowTunnelRecordReader(long start,
                               long count,
                               List<Column> columns,
                               com.aliyun.odps.rest.RestClient tunnelRestClient,
                               TableTunnel.DownloadSession session,
                               org.apache.arrow.memory.BufferAllocator allocator,
                               CompressOption compress)
                        throws TunnelException,
                               IOException

Throws:

TunnelException

IOException

Method Detail

read

public org.apache.arrow.vector.VectorSchemaRoot read()
                                              throws IOException

Description copied from interface: ArrowRecordReader

读取一个batch的记录

Specified by:

read in interface ArrowRecordReader

Returns:

VectorSchemaRoot 成功读到记录返回VectorSchemaRoot对象, 读取完成返回null

Throws:

IOException - 读取过程发生异常, 发生异常后不可重试

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException