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en:site:recherche:logiciels:sparqlwithspark:chain4
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| Both sides previous revision Previous revision | |||
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en:site:recherche:logiciels:sparqlwithspark:chain4 [16/09/2016 23:04] hubert |
en:site:recherche:logiciels:sparqlwithspark:chain4 [16/09/2016 23:10] (current) hubert [Chain4 query plans] |
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| Line 6: | Line 6: | ||
| The plans produced by each method are: | The plans produced by each method are: | ||
| * SPARQL RDD: | * SPARQL RDD: | ||
| - | <code> | + | |
| + | <code scala> | ||
| val d1 = triples.filter{case(s,(p,o))=> p==P1}.map{case(x1,(p, x2)) => (x2, x1)} | val d1 = triples.filter{case(s,(p,o))=> p==P1}.map{case(x1,(p, x2)) => (x2, x1)} | ||
| val d2 = triples.filter{case(s,(p,o))=> p==P2}.mapValues{case(p,x3) => x3} | val d2 = triples.filter{case(s,(p,o))=> p==P2}.mapValues{case(p,x3) => x3} | ||
| Line 19: | Line 20: | ||
| * SPARQL DF: | * SPARQL DF: | ||
| - | <code> | + | <code scala> |
| val t1 = df.where(s"p=$P1").select("s","o").withColumnRenamed("s", "x1").withColumnRenamed("o", "x2") | val t1 = df.where(s"p=$P1").select("s","o").withColumnRenamed("s", "x1").withColumnRenamed("o", "x2") | ||
| val t2 = df.where(s"p=$P2").select("s","o").withColumnRenamed("s", "x2").withColumnRenamed("o", "x3") | val t2 = df.where(s"p=$P2").select("s","o").withColumnRenamed("s", "x2").withColumnRenamed("o", "x3") | ||
| Line 28: | Line 29: | ||
| * SPARQL Hybrid DF: | * SPARQL Hybrid DF: | ||
| - | <code> | + | <code scala> |
| val subg = df.where(s"p in ($P2, $P3, $P4)") | val subg = df.where(s"p in ($P2, $P3, $P4)") | ||
| subg.persist | subg.persist | ||
en/site/recherche/logiciels/sparqlwithspark/chain4.1474059851.txt.gz · Last modified: 16/09/2016 23:04 by hubert
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