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The following page has been changed by OlgaN: http://wiki.apache.org/pig/JoinFramework ------------------------------------------------------------------------------ The data coming out of the join is not guaranteed to be sorted on the join key which could cause problems for queries that follow join by `GROUP` or `ORDER BY` on the prefix of the join key. This should be taken into account when choosing join type. Note that CROSS can take advantage of this approach as well. + + Details of the current implementation and performance measurements can be found in PigFRJoin. === Indexed Join (IJ) ===
