Package | Description |
---|---|
org.apache.hadoop.mapred.join | |
org.apache.hadoop.mapreduce.lib.join |
Modifier and Type | Class and Description |
---|---|
class |
TupleWritable
Writable type storing multiple
Writable s. |
Modifier and Type | Method and Description |
---|---|
protected TupleWritable |
CompositeRecordReader.createTupleWritable()
Create a value to be used internally for joins.
|
TupleWritable |
JoinRecordReader.createValue() |
Modifier and Type | Method and Description |
---|---|
RecordReader<K,TupleWritable> |
CompositeInputFormat.createRecordReader(InputSplit split,
TaskAttemptContext taskContext)
Construct a CompositeRecordReader for the children of this InputFormat
as defined in the init expression.
|
protected ResetableIterator<TupleWritable> |
JoinRecordReader.getDelegate()
Return an iterator wrapping the JoinCollector.
|
Modifier and Type | Method and Description |
---|---|
protected boolean |
MultiFilterRecordReader.combine(Object[] srcs,
TupleWritable dst)
Default implementation offers
MultiFilterRecordReader.emit(org.apache.hadoop.mapreduce.lib.join.TupleWritable) every Tuple from the
collector (the outer join of child RRs). |
protected abstract boolean |
CompositeRecordReader.combine(Object[] srcs,
TupleWritable value) |
protected boolean |
OuterJoinRecordReader.combine(Object[] srcs,
TupleWritable dst)
Emit everything from the collector.
|
protected boolean |
InnerJoinRecordReader.combine(Object[] srcs,
TupleWritable dst)
Return true iff the tuple is full (all data sources contain this key).
|
protected V |
OverrideRecordReader.emit(TupleWritable dst)
Emit the value with the highest position in the tuple.
|
protected abstract V |
MultiFilterRecordReader.emit(TupleWritable dst)
For each tuple emitted, return a value (typically one of the values
in the tuple).
|
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