Give pseudocode for computing a join r r. A=s. A s using a single MapReduce step, assuming
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Give pseudocode for computing a join r ⋈r. A=s. A s using a single MapReduce step, assuming that the map() function is invoked on each tuple of r and s. Assume that the map() function can find the name of the relation using context. relname().
Transcribed Image Text:
JavaRDD
JavaRDD s.length())
.reduce(0,(a,b) -> a+b);
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The pseudocode is as follows i Sort the attributes of A using and ascending ii Look...View the full answer
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Related Book For
Database System Concepts
ISBN: 9780078022159
7th Edition
Authors: Abraham Silberschatz, Henry F. Korth, S. Sudarshan
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