text: SELECT tab0.v1 AS v1 , tab6.v7 AS v7 , tab4.v5 AS v5 , tab5.v6 AS v6 , tab3.v4 AS v4 , tab8.v9 AS v9 , tab2.v3 AS v3 , tab7.v8 AS v8 , tab1.v2 AS v2 
   FROM    (SELECT obj AS v1 
  	 FROM wsdbm__follows$$1$$
  	 
  	 WHERE sub = 'wsdbm:User8220'
  	) 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 rev__hasReview$$3$$
  	
  	) tab2
   ON(tab1.v2=tab2.v2)
   JOIN    (SELECT obj AS v4 , sub AS v3 
  	 FROM rev__reviewer$$4$$
  	
  	) tab3
   ON(tab2.v3=tab3.v3)
   JOIN    (SELECT obj AS v5 , sub AS v4 
  	 FROM wsdbm__friendOf$$5$$
  	
  	) tab4
   ON(tab3.v4=tab4.v4)
   JOIN    (SELECT sub AS v5 , obj AS v6 
  	 FROM wsdbm__makesPurchase$$6$$
  	
  	) tab5
   ON(tab4.v5=tab5.v5)
   JOIN    (SELECT obj AS v7 , sub AS v6 
  	 FROM wsdbm__purchaseFor$$7$$
  	
  	) tab6
   ON(tab5.v6=tab6.v6)
   JOIN    (SELECT sub AS v7 , obj AS v8 
  	 FROM sorg__author$$8$$
  	) tab7
   ON(tab6.v7=tab7.v7)
   JOIN    (SELECT obj AS v9 , sub AS v8 
  	 FROM dc__Location$$9$$
  	) tab8
   ON(tab7.v8=tab8.v8)
  
  
  ++++++Tables Statistic
  sorg__author$$8$$	2	OS	sorg__author/dc__Location
  	VP	<sorg__author>	367
  	SO	<sorg__author><wsdbm__purchaseFor>	285	0.78
  	OS	<sorg__author><dc__Location>	143	0.39
  ------
  wsdbm__makesPurchase$$6$$	0	VP	wsdbm__makesPurchase/
  	VP	<wsdbm__makesPurchase>	15000
  	SO	<wsdbm__makesPurchase><wsdbm__friendOf>	15000	1.0
  	OS	<wsdbm__makesPurchase><wsdbm__purchaseFor>	15000	1.0
  ------
  dc__Location$$9$$	1	SO	dc__Location/sorg__author
  	VP	<dc__Location>	3925
  	SO	<dc__Location><sorg__author>	138	0.04
  ------
  wsdbm__likes$$2$$	2	OS	wsdbm__likes/rev__hasReview
  	VP	<wsdbm__likes>	11256
  	SO	<wsdbm__likes><wsdbm__follows>	10495	0.93
  	OS	<wsdbm__likes><rev__hasReview>	2392	0.21
  ------
  wsdbm__purchaseFor$$7$$	2	OS	wsdbm__purchaseFor/sorg__author
  	VP	<wsdbm__purchaseFor>	15000
  	SO	<wsdbm__purchaseFor><wsdbm__makesPurchase>	15000	1.0
  	OS	<wsdbm__purchaseFor><sorg__author>	1313	0.09
  ------
  rev__reviewer$$4$$	2	OS	rev__reviewer/wsdbm__friendOf
  	VP	<rev__reviewer>	15000
  	SO	<rev__reviewer><rev__hasReview>	14757	0.98
  	OS	<rev__reviewer><wsdbm__friendOf>	5835	0.39
  ------
  rev__hasReview$$3$$	1	SO	rev__hasReview/wsdbm__likes
  	VP	<rev__hasReview>	14757
  	SO	<rev__hasReview><wsdbm__likes>	14049	0.95
  	OS	<rev__hasReview><rev__reviewer>	14757	1.0
  ------
  wsdbm__follows$$1$$	1	OS	wsdbm__follows/wsdbm__likes
  	VP	<wsdbm__follows>	330403
  	OS	<wsdbm__follows><wsdbm__likes>	78618	0.24
  ------
  wsdbm__friendOf$$5$$	2	OS	wsdbm__friendOf/wsdbm__makesPurchase
  	VP	<wsdbm__friendOf>	448135
  	SO	<wsdbm__friendOf><rev__reviewer>	133496	0.3
  	OS	<wsdbm__friendOf><wsdbm__makesPurchase>	71148	0.16
  ------
  