2 -- Table to manage users trust network
4 DROP TABLE IF EXISTS #PFX#usersnet;
5 CREATE TABLE #PFX#usersnet (
6 owner integer REFERENCES #PFX#users (code)
7 ON DELETE cascade ON UPDATE cascade, -- network owner
8 inher integer NULL REFERENCES #PFX#users (code)
9 ON DELETE cascade ON UPDATE cascade, -- inheriting user
10 target integer REFERENCES #PFX#users (code)
11 ON DELETE cascade ON UPDATE cascade, -- evaluated user
12 friend integer, -- friendship level
13 -- 1"black", 2"unknown", 3"test", 4"friend", 5"bff"
14 skill float, -- skill level
16 ctime timestamp DEFAULT now(), -- creation time
17 mtime timestamp DEFAULT to_timestamp(0) -- modification time
20 DROP INDEX IF EXISTS #PFX#usersnet_owner_idx;
21 DROP INDEX IF EXISTS #PFX#usersnet_target_idx;
22 DROP INDEX IF EXISTS #PFX#usersnet_owner_target_idx;
23 DROP INDEX IF EXISTS #PFX#usersnet_owner_inher_idx;
24 DROP INDEX IF EXISTS #PFX#usersnet_owner_target_inher_idx;
26 CREATE INDEX #PFX#usersnet_owner_idx ON #PFX#usersnet (owner);
27 CREATE INDEX #PFX#usersnet_target_idx ON #PFX#usersnet (target);
28 CREATE INDEX #PFX#usersnet_owner_target_idx ON #PFX#usersnet (owner, target);
29 CREATE INDEX #PFX#usersnet_owner_inher_idx ON #PFX#usersnet (owner,inher);
30 CREATE UNIQUE INDEX #PFX#usersnet_owner_target_inher_idx ON #PFX#usersnet (owner, target, inher);
32 DROP VIEW #PFX#usersnet_wideskill;
33 CREATE VIEW #PFX#usersnet_wideskill
34 AS SELECT un.owner, ur.target, SUM(ur.skill * un.trust) / SUM(un.trust) as skill, count(*) as count
35 FROM bsk_usersnet AS un, bsk_usersnet AS ur
36 WHERE un.owner = 10101 -- owner is xxx
37 AND un.target = ur.owner AND un.friend >= 4 -- 'un' is, at least, our friend
38 GROUP BY un.owner, ur.target;
40 DROP VIEW #PFX#usersnet_narrowskill;
41 CREATE VIEW #PFX#usersnet_narrowskill
42 AS SELECT un.owner, ur.target, SUM(ur.skill * un.trust) / SUM(un.trust) as skill, count(*) as count
43 FROM bsk_usersnet AS un, bsk_usersnet AS ur -- 'un' primary records, 'ur' inheriting records
44 WHERE un.owner = 10101 -- owner is xxx
45 AND un.target = ur.owner AND un.friend = 5 -- 'un' is, at least, our friend
46 GROUP BY un.owner, ur.target;