org.apache.drill.exec.store.text

Class DrillTextRecordReader

java.lang.Object

org.apache.drill.exec.store.AbstractRecordReader

org.apache.drill.exec.store.text.DrillTextRecordReader

All Implemented Interfaces:

AutoCloseable, RecordReader

public class DrillTextRecordReader
extends AbstractRecordReader

Field Summary

Fields inherited from class org.apache.drill.exec.store.AbstractRecordReader

DEFAULT_TEXT_COLS_TO_READ

Fields inherited from interface org.apache.drill.exec.store.RecordReader

ALLOCATOR_INITIAL_RESERVATION, ALLOCATOR_MAX_RESERVATION

Constructor Summary

Constructors

Constructor and Description
DrillTextRecordReader(org.apache.hadoop.mapred.FileSplit split, org.apache.hadoop.conf.Configuration fsConf, FragmentContext context, char delimiter, List<SchemaPath> columns)

Method Summary

Methods

Modifier and Type	Method and Description
void	close()
int	find(org.apache.hadoop.io.Text text, byte delimiter, int start) Returns the index within the text of the first occurrence of delimiter, starting the search at the specified index.
protected List<SchemaPath>	getDefaultColumnsToRead()
protected void	handleAndRaise(String s, Exception e)
boolean	isStarQuery()
int	next() Increments this record reader forward, writing via the provided output mutator into the output batch.
void	setup(OperatorContext context, OutputMutator output) Configure the RecordReader with the provided schema and the record batch that should be written to.

Methods inherited from class org.apache.drill.exec.store.AbstractRecordReader

allocate, getColumns, isSkipQuery, setColumns, toString, transformColumns

Methods inherited from class java.lang.Object

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

Constructor Detail

DrillTextRecordReader

public DrillTextRecordReader(org.apache.hadoop.mapred.FileSplit split,
                     org.apache.hadoop.conf.Configuration fsConf,
                     FragmentContext context,
                     char delimiter,
                     List<SchemaPath> columns)

Method Detail

getDefaultColumnsToRead

protected List<SchemaPath> getDefaultColumnsToRead()

Overrides:

getDefaultColumnsToRead in class AbstractRecordReader

isStarQuery

public boolean isStarQuery()

Overrides:

isStarQuery in class AbstractRecordReader

setup

public void setup(OperatorContext context,
         OutputMutator output)
           throws ExecutionSetupException

Description copied from interface: RecordReader

Configure the RecordReader with the provided schema and the record batch that should be written to.

Parameters:

context - operator context for the reader

output - The place where output for a particular scan should be written. The record reader is responsible for mutating the set of schema values for that particular record.

Throws:

ExecutionSetupException

handleAndRaise

protected void handleAndRaise(String s,
                  Exception e)

next

public int next()

Description copied from interface: RecordReader

Increments this record reader forward, writing via the provided output mutator into the output batch.

Returns:

The number of additional records added to the output.

find

public int find(org.apache.hadoop.io.Text text,
       byte delimiter,
       int start)

Returns the index within the text of the first occurrence of delimiter, starting the search at the specified index.

Parameters:

text - the text being searched

delimiter - the delimiter

start - the index to start searching

Returns:

the first occurrence of delimiter, starting the search at the specified index

close

public void close()