text: SELECT tab0.v1 AS v1 , tab4.v5 AS v5 , tab5.v6 AS v6 , tab3.v4 AS v4 , tab2.v3 AS v3 , tab1.v2 AS v2 
   FROM    (SELECT obj AS v1 
  	 FROM wsdbm__friendOf$$1$$
  	 
  	 WHERE sub = 'wsdbm:User6707'
  	) tab0
   JOIN    (SELECT sub AS v1 , obj AS v2 
  	 FROM wsdbm__likes$$2$$
  	) tab1
   ON(tab0.v1=tab1.v1)
   JOIN    (SELECT obj AS v3 , sub AS v2 
  	 FROM sorg__author$$3$$
  	) tab2
   ON(tab1.v2=tab2.v2)
   JOIN    (SELECT obj AS v4 , sub AS v3 
  	 FROM wsdbm__makesPurchase$$4$$
  	
  	) tab3
   ON(tab2.v3=tab3.v3)
   JOIN    (SELECT obj AS v5 , sub AS v4 
  	 FROM wsdbm__purchaseFor$$5$$
  	
  	) tab4
   ON(tab3.v4=tab4.v4)
   JOIN    (SELECT sub AS v5 , obj AS v6 
  	 FROM sorg__contentRating$$6$$
  	
  	) tab5
   ON(tab4.v5=tab5.v5)
  
  
  ++++++Tables Statistic
  sorg__author$$3$$	2	OS	sorg__author/wsdbm__makesPurchase
  	VP	<sorg__author>	367
  	SO	<sorg__author><wsdbm__likes>	347	0.95
  	OS	<sorg__author><wsdbm__makesPurchase>	45	0.12
  ------
  wsdbm__friendOf$$1$$	1	OS	wsdbm__friendOf/wsdbm__likes
  	VP	<wsdbm__friendOf>	448135
  	OS	<wsdbm__friendOf><wsdbm__likes>	106881	0.24
  ------
  sorg__contentRating$$6$$	1	SO	sorg__contentRating/wsdbm__purchaseFor
  	VP	<sorg__contentRating>	749
  	SO	<sorg__contentRating><wsdbm__purchaseFor>	592	0.79
  ------
  wsdbm__likes$$2$$	2	OS	wsdbm__likes/sorg__author
  	VP	<wsdbm__likes>	11256
  	SO	<wsdbm__likes><wsdbm__friendOf>	11256	1.0
  	OS	<wsdbm__likes><sorg__author>	980	0.09
  ------
  wsdbm__makesPurchase$$4$$	1	SO	wsdbm__makesPurchase/sorg__author
  	VP	<wsdbm__makesPurchase>	15000
  	SO	<wsdbm__makesPurchase><sorg__author>	421	0.03
  	OS	<wsdbm__makesPurchase><wsdbm__purchaseFor>	15000	1.0
  ------
  wsdbm__purchaseFor$$5$$	2	OS	wsdbm__purchaseFor/sorg__contentRating
  	VP	<wsdbm__purchaseFor>	15000
  	SO	<wsdbm__purchaseFor><wsdbm__makesPurchase>	15000	1.0
  	OS	<wsdbm__purchaseFor><sorg__contentRating>	4187	0.28
  ------
  