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| 7 | Uses of Package org.apache.hadoop.mapred.join (Hadoop 0.20.1 API) |
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| 93 | <TD><A HREF="#org.apache.hadoop.mapred.join"><B>org.apache.hadoop.mapred.join</B></A></TD> |
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| 94 | <TD>Given a set of sorted datasets keyed with the same class and yielding equal |
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| 95 | partitions, it is possible to effect a join of those datasets prior to the map. </TD> |
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| 104 | Classes in <A HREF="../../../../../org/apache/hadoop/mapred/join/package-summary.html">org.apache.hadoop.mapred.join</A> used by <A HREF="../../../../../org/apache/hadoop/mapred/join/package-summary.html">org.apache.hadoop.mapred.join</A></FONT></TH> |
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| 105 | </TR> |
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| 107 | <TD><B><A HREF="../../../../../org/apache/hadoop/mapred/join/class-use/ComposableInputFormat.html#org.apache.hadoop.mapred.join"><B>ComposableInputFormat</B></A></B> |
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| 108 | |
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| 109 | <BR> |
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| 110 | Refinement of InputFormat requiring implementors to provide |
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| 111 | ComposableRecordReader instead of RecordReader.</TD> |
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| 112 | </TR> |
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| 114 | <TD><B><A HREF="../../../../../org/apache/hadoop/mapred/join/class-use/ComposableRecordReader.html#org.apache.hadoop.mapred.join"><B>ComposableRecordReader</B></A></B> |
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| 115 | |
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| 116 | <BR> |
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| 117 | Additional operations required of a RecordReader to participate in a join.</TD> |
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| 120 | <TD><B><A HREF="../../../../../org/apache/hadoop/mapred/join/class-use/CompositeRecordReader.html#org.apache.hadoop.mapred.join"><B>CompositeRecordReader</B></A></B> |
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| 121 | |
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| 122 | <BR> |
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| 123 | A RecordReader that can effect joins of RecordReaders sharing a common key |
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| 124 | type and partitioning.</TD> |
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| 125 | </TR> |
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| 127 | <TD><B><A HREF="../../../../../org/apache/hadoop/mapred/join/class-use/JoinRecordReader.html#org.apache.hadoop.mapred.join"><B>JoinRecordReader</B></A></B> |
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| 128 | |
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| 129 | <BR> |
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| 130 | Base class for Composite joins returning Tuples of arbitrary Writables.</TD> |
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| 131 | </TR> |
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| 132 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 133 | <TD><B><A HREF="../../../../../org/apache/hadoop/mapred/join/class-use/MultiFilterRecordReader.html#org.apache.hadoop.mapred.join"><B>MultiFilterRecordReader</B></A></B> |
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| 134 | |
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| 135 | <BR> |
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| 136 | Base class for Composite join returning values derived from multiple |
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| 137 | sources, but generally not tuples.</TD> |
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| 138 | </TR> |
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| 139 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 140 | <TD><B><A HREF="../../../../../org/apache/hadoop/mapred/join/class-use/Parser.Node.html#org.apache.hadoop.mapred.join"><B>Parser.Node</B></A></B> |
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| 141 | |
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| 142 | <BR> |
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| 143 | </TD> |
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| 144 | </TR> |
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| 145 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 146 | <TD><B><A HREF="../../../../../org/apache/hadoop/mapred/join/class-use/Parser.Token.html#org.apache.hadoop.mapred.join"><B>Parser.Token</B></A></B> |
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| 147 | |
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| 148 | <BR> |
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| 149 | Tagged-union type for tokens from the join expression.</TD> |
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| 150 | </TR> |
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| 158 | <TD><B><A HREF="../../../../../org/apache/hadoop/mapred/join/class-use/ResetableIterator.html#org.apache.hadoop.mapred.join"><B>ResetableIterator</B></A></B> |
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| 159 | |
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| 160 | <BR> |
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| 161 | This defines an interface to a stateful Iterator that can replay elements |
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| 162 | added to it directly.</TD> |
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| 166 | |
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| 167 | <BR> |
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| 168 | Writable type storing multiple <A HREF="../../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io"><CODE>Writable</CODE></A>s.</TD> |
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