org.apache.hadoop.hive.ql.io.orc

Interface RecordReader

public interface RecordReader

A row-by-row iterator for ORC files.

Method Summary

Modifier and Type	Method and Description
void	close() Release the resources associated with the given reader.
float	getProgress() Get the progress of the reader through the rows.
long	getRowNumber() Get the row number of the row that will be returned by the following call to next().
boolean	hasNext() Does the reader have more rows available.
java.lang.Object	next(java.lang.Object previous) Read the next row.
void	seekToRow(long rowCount) Seek to a particular row number.

Method Detail

hasNext

boolean hasNext()
         throws java.io.IOException

Does the reader have more rows available.

Returns:

true if there are more rows

Throws:

java.io.IOException

next

java.lang.Object next(java.lang.Object previous)
               throws java.io.IOException

Read the next row.

Parameters:

previous - a row object that can be reused by the reader

Returns:

the row that was read

Throws:

java.io.IOException

getRowNumber

long getRowNumber()
           throws java.io.IOException

Get the row number of the row that will be returned by the following call to next().

Returns:

the row number from 0 to the number of rows in the file

Throws:

java.io.IOException

getProgress

float getProgress()
           throws java.io.IOException

Get the progress of the reader through the rows.

Returns:

a fraction between 0.0 and 1.0 of rows read

Throws:

java.io.IOException

close

void close()
    throws java.io.IOException

Release the resources associated with the given reader.

Throws:

java.io.IOException

seekToRow

void seekToRow(long rowCount)
        throws java.io.IOException

Seek to a particular row number.

Throws:

java.io.IOException