com.facebook.presto.parquet.reader

Class ParquetReader

java.lang.Object

com.facebook.presto.parquet.reader.ParquetReader

All Implemented Interfaces:

Closeable, AutoCloseable

public class ParquetReader
extends Object
implements Closeable

Constructor Summary

Constructors

Constructor and Description

ParquetReader(org.apache.parquet.io.MessageColumnIO messageColumnIO, List<org.apache.parquet.hadoop.metadata.BlockMetaData> blocks, Optional<List<Long>> firstRowsOfBlocks, ParquetDataSource dataSource, AggregatedMemoryContext systemMemoryContext, io.airlift.units.DataSize maxReadBlockSize, boolean batchReadEnabled, boolean enableVerification, Predicate parquetPredicate, List<org.apache.parquet.internal.filter2.columnindex.ColumnIndexStore> blockIndexStores, boolean columnIndexFilterEnabled, Optional<org.apache.parquet.crypto.InternalFileDecryptor> fileDecryptor)

Method Summary

Modifier and Type	Method and Description
void	close()
ParquetDataSource	getDataSource()
long	getPosition()
long	getSystemMemoryUsage()
long	lastBatchStartRow() Get the global row index of the first row in the last batch.
int	nextBatch()
Block	readBlock(Field field)

Methods inherited from class java.lang.Object

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

Constructor Detail

ParquetReader

public ParquetReader(org.apache.parquet.io.MessageColumnIO messageColumnIO,
                     List<org.apache.parquet.hadoop.metadata.BlockMetaData> blocks,
                     Optional<List<Long>> firstRowsOfBlocks,
                     ParquetDataSource dataSource,
                     AggregatedMemoryContext systemMemoryContext,
                     io.airlift.units.DataSize maxReadBlockSize,
                     boolean batchReadEnabled,
                     boolean enableVerification,
                     Predicate parquetPredicate,
                     List<org.apache.parquet.internal.filter2.columnindex.ColumnIndexStore> blockIndexStores,
                     boolean columnIndexFilterEnabled,
                     Optional<org.apache.parquet.crypto.InternalFileDecryptor> fileDecryptor)

Method Detail

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException

getPosition

public long getPosition()

lastBatchStartRow

public long lastBatchStartRow()

Get the global row index of the first row in the last batch.

nextBatch

public int nextBatch()

getDataSource

public ParquetDataSource getDataSource()

getSystemMemoryUsage

public long getSystemMemoryUsage()

readBlock

public Block readBlock(Field field)
                throws IOException

Throws:

IOException