Bases de Données / Databases

Site Web de l'équipe BD du LIP6 / LIP6 DB Web Site

User Tools

Site Tools

Trace: • Chain6 query plans
en:site:recherche:logiciels:sparqlwithspark:chain6

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
en:site:recherche:logiciels:sparqlwithspark:chain6 [15/09/2016 10:11] – huberten:site:recherche:logiciels:sparqlwithspark:chain6 [16/09/2016 23:11] (current) – [Chain6 query plans] hubert
Line 1: Line 1:
-{{indexmenu_n>4}}+{{indexmenu_n>7}}
  
 ====== Chain6 query plans ====== ====== Chain6 query plans ======
Line 5: Line 5:
 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 21: Line 21:
  
   * 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 33: Line 33:
  
   * SPARQL Hybrid DF:   * SPARQL Hybrid DF:
-<code>+<code scala>
 val subg = df.where(s"p in ($P1, $P2, $P3, $P4, $P5, $P6)") val subg = df.where(s"p in ($P1, $P2, $P3, $P4, $P5, $P6)")
 subg.persist subg.persist
en/site/recherche/logiciels/sparqlwithspark/chain6.1473927113.txt.gz · Last modified: by hubert