com.facebook.hive.orc

Class OrcFile

java.lang.Object

com.facebook.hive.orc.OrcFile

public final class OrcFile
extends Object

Contains factory methods to read or write ORC files.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	OrcFile.KeyWrapper
static class	OrcFile.ValueWrapper

Field Summary

Fields

Modifier and Type	Field and Description
static String	COMPRESSION
static String	COMPRESSION_BLOCK_SIZE
static String	ENABLE_INDEXES
static String	MAGIC
static String	ROW_INDEX_STRIDE
static String	STRIPE_SIZE

Method Summary

Modifier and Type	Method and Description
static Reader	createReader(org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path path, org.apache.hadoop.conf.Configuration conf) Create an ORC file reader.
static Writer	createWriter(org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path path, org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector inspector, long stripeSize, CompressionKind compress, int bufferSize, int rowIndexStride) Create an ORC file streamFactory.

Methods inherited from class java.lang.Object

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

Field Detail

MAGIC

public static final String MAGIC

See Also:

Constant Field Values

COMPRESSION

public static final String COMPRESSION

See Also:

Constant Field Values

COMPRESSION_BLOCK_SIZE

public static final String COMPRESSION_BLOCK_SIZE

See Also:

Constant Field Values

STRIPE_SIZE

public static final String STRIPE_SIZE

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Constant Field Values

ROW_INDEX_STRIDE

public static final String ROW_INDEX_STRIDE

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Constant Field Values

ENABLE_INDEXES

public static final String ENABLE_INDEXES

See Also:

Constant Field Values

Method Detail

createReader

public static Reader createReader(org.apache.hadoop.fs.FileSystem fs,
                                  org.apache.hadoop.fs.Path path,
                                  org.apache.hadoop.conf.Configuration conf)
                           throws IOException

Create an ORC file reader.

Parameters:

fs - file system

path - file name to read from

Returns:

a new ORC file reader.

Throws:

IOException

createWriter

public static Writer createWriter(org.apache.hadoop.fs.FileSystem fs,
                                  org.apache.hadoop.fs.Path path,
                                  org.apache.hadoop.conf.Configuration conf,
                                  org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector inspector,
                                  long stripeSize,
                                  CompressionKind compress,
                                  int bufferSize,
                                  int rowIndexStride)
                           throws IOException

Create an ORC file streamFactory.

Parameters:

fs - file system

path - filename to write to

inspector - the ObjectInspector that inspects the rows

stripeSize - the number of bytes in a stripe

compress - how to compress the file

bufferSize - the number of bytes to compress at once

rowIndexStride - the number of rows between row index entries or 0 to suppress all indexes

Returns:

a new ORC file streamFactory

Throws:

IOException