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jbe@423
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1 BEGIN;
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jbe@423
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2
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jbe@423
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3 CREATE OR REPLACE VIEW "liquid_feedback_version" AS
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jbe@423
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4 SELECT * FROM (VALUES ('3.0.2', 3, 0, 2))
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jbe@423
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5 AS "subquery"("string", "major", "minor", "revision");
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jbe@423
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6
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jbe@430
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7
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jbe@430
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8 CREATE TYPE "defeat_strength" AS ENUM ('simple', 'tuple');
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jbe@430
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9
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jbe@430
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10 COMMENT ON TYPE "defeat_strength" IS 'How pairwise defeats are measured for the Schulze method: ''simple'' = only the number of winning votes, ''tuple'' = primarily the number of winning votes, secondarily the number of losing votes';
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jbe@430
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11
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jbe@430
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12
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jbe@430
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13 CREATE TYPE "tie_breaking" AS ENUM ('simple', 'variant1', 'variant2');
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jbe@430
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14
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jbe@430
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15 COMMENT ON TYPE "tie_breaking" IS 'Tie-breaker for the Schulze method: ''simple'' = only initiative ids are used, ''variant1'' = use initiative ids in variant 1 for tie breaking of the links (TBRL) and sequentially forbid shared links, ''variant2'' = use initiative ids in variant 2 for tie breaking of the links (TBRL) and sequentially forbid shared links';
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jbe@430
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16
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jbe@430
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17
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jbe@430
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18 ALTER TABLE "policy" ADD COLUMN "defeat_strength" "defeat_strength" NOT NULL DEFAULT 'tuple';
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jbe@430
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19 ALTER TABLE "policy" ADD COLUMN "tie_breaking" "tie_breaking" NOT NULL DEFAULT 'variant1';
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jbe@430
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20
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jbe@430
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21 ALTER TABLE "policy" ADD
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jbe@430
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22 CONSTRAINT "no_reverse_beat_path_requires_tuple_defeat_strength" CHECK (
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jbe@430
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23 ("defeat_strength" = 'tuple'::"defeat_strength" OR "no_reverse_beat_path" = FALSE)
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jbe@430
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24 );
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jbe@430
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25
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jbe@430
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26 COMMENT ON COLUMN "policy"."defeat_strength" IS 'How pairwise defeats are measured for the Schulze method; see type "defeat_strength"; ''tuple'' is the recommended setting';
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jbe@430
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27 COMMENT ON COLUMN "policy"."tie_breaking" IS 'Tie-breaker for the Schulze method; see type "tie_breaking"; ''variant1'' or ''variant2'' are recommended';
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jbe@430
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28 COMMENT ON COLUMN "initiative"."reverse_beat_path" IS 'TRUE, if there is a beat path (may include ties) from this initiative to the status quo; set to NULL if "policy"."defeat_strength" is set to ''simple''';
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jbe@430
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29
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30
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jbe@433
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31 CREATE OR REPLACE FUNCTION "close_voting"("issue_id_p" "issue"."id"%TYPE)
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jbe@433
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32 RETURNS VOID
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jbe@433
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33 LANGUAGE 'plpgsql' VOLATILE AS $$
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jbe@433
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34 DECLARE
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jbe@433
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35 "area_id_v" "area"."id"%TYPE;
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jbe@433
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36 "unit_id_v" "unit"."id"%TYPE;
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jbe@433
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37 "member_id_v" "member"."id"%TYPE;
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jbe@433
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38 BEGIN
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jbe@433
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39 PERFORM "require_transaction_isolation"();
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jbe@433
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40 SELECT "area_id" INTO "area_id_v" FROM "issue" WHERE "id" = "issue_id_p";
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jbe@433
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41 SELECT "unit_id" INTO "unit_id_v" FROM "area" WHERE "id" = "area_id_v";
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jbe@433
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42 -- override protection triggers:
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jbe@433
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43 INSERT INTO "temporary_transaction_data" ("key", "value")
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jbe@433
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44 VALUES ('override_protection_triggers', TRUE::TEXT);
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jbe@433
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45 -- delete timestamp of voting comment:
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jbe@433
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46 UPDATE "direct_voter" SET "comment_changed" = NULL
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jbe@433
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47 WHERE "issue_id" = "issue_id_p";
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jbe@433
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48 -- delete delegating votes (in cases of manual reset of issue state):
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jbe@433
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49 DELETE FROM "delegating_voter"
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jbe@433
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50 WHERE "issue_id" = "issue_id_p";
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jbe@433
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51 -- delete votes from non-privileged voters:
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jbe@433
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52 DELETE FROM "direct_voter"
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jbe@433
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53 USING (
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jbe@433
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54 SELECT
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jbe@433
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55 "direct_voter"."member_id"
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jbe@433
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56 FROM "direct_voter"
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jbe@433
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57 JOIN "member" ON "direct_voter"."member_id" = "member"."id"
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jbe@433
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58 LEFT JOIN "privilege"
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59 ON "privilege"."unit_id" = "unit_id_v"
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60 AND "privilege"."member_id" = "direct_voter"."member_id"
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jbe@433
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61 WHERE "direct_voter"."issue_id" = "issue_id_p" AND (
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62 "member"."active" = FALSE OR
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63 "privilege"."voting_right" ISNULL OR
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jbe@433
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64 "privilege"."voting_right" = FALSE
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jbe@433
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65 )
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jbe@433
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66 ) AS "subquery"
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jbe@433
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67 WHERE "direct_voter"."issue_id" = "issue_id_p"
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jbe@433
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68 AND "direct_voter"."member_id" = "subquery"."member_id";
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jbe@433
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69 -- consider delegations:
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jbe@433
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70 UPDATE "direct_voter" SET "weight" = 1
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jbe@433
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71 WHERE "issue_id" = "issue_id_p";
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jbe@433
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72 PERFORM "add_vote_delegations"("issue_id_p");
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jbe@433
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73 -- mark first preferences:
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jbe@433
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74 UPDATE "vote" SET "first_preference" = "subquery"."first_preference"
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jbe@433
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75 FROM (
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jbe@433
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76 SELECT
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jbe@433
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77 "vote"."initiative_id",
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78 "vote"."member_id",
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jbe@433
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79 CASE WHEN "vote"."grade" > 0 THEN
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80 CASE WHEN "vote"."grade" = max("agg"."grade") THEN TRUE ELSE FALSE END
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81 ELSE NULL
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jbe@433
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82 END AS "first_preference"
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jbe@433
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83 FROM "vote"
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jbe@433
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84 JOIN "initiative" -- NOTE: due to missing index on issue_id
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85 ON "vote"."issue_id" = "initiative"."issue_id"
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jbe@433
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86 JOIN "vote" AS "agg"
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jbe@433
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87 ON "initiative"."id" = "agg"."initiative_id"
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jbe@433
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88 AND "vote"."member_id" = "agg"."member_id"
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jbe@433
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89 GROUP BY "vote"."initiative_id", "vote"."member_id", "vote"."grade"
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jbe@433
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90 ) AS "subquery"
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jbe@433
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91 WHERE "vote"."issue_id" = "issue_id_p"
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jbe@433
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92 AND "vote"."initiative_id" = "subquery"."initiative_id"
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jbe@433
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93 AND "vote"."member_id" = "subquery"."member_id";
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jbe@433
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94 -- finish overriding protection triggers (avoids garbage):
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jbe@433
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95 DELETE FROM "temporary_transaction_data"
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jbe@433
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96 WHERE "key" = 'override_protection_triggers';
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jbe@433
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97 -- materialize battle_view:
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jbe@433
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98 -- NOTE: "closed" column of issue must be set at this point
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99 DELETE FROM "battle" WHERE "issue_id" = "issue_id_p";
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jbe@433
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100 INSERT INTO "battle" (
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jbe@433
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101 "issue_id",
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jbe@433
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102 "winning_initiative_id", "losing_initiative_id",
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jbe@433
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103 "count"
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jbe@433
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104 ) SELECT
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jbe@433
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105 "issue_id",
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jbe@433
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106 "winning_initiative_id", "losing_initiative_id",
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jbe@433
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107 "count"
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jbe@433
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108 FROM "battle_view" WHERE "issue_id" = "issue_id_p";
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jbe@433
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109 -- set voter count:
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jbe@433
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110 UPDATE "issue" SET
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jbe@433
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111 "voter_count" = (
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jbe@433
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112 SELECT coalesce(sum("weight"), 0)
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jbe@433
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113 FROM "direct_voter" WHERE "issue_id" = "issue_id_p"
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jbe@433
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114 )
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jbe@433
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115 WHERE "id" = "issue_id_p";
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jbe@433
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116 -- calculate "first_preference_votes":
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jbe@433
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117 UPDATE "initiative"
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118 SET "first_preference_votes" = coalesce("subquery"."sum", 0)
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jbe@433
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119 FROM (
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jbe@433
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120 SELECT "vote"."initiative_id", sum("direct_voter"."weight")
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121 FROM "vote" JOIN "direct_voter"
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122 ON "vote"."issue_id" = "direct_voter"."issue_id"
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jbe@433
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123 AND "vote"."member_id" = "direct_voter"."member_id"
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jbe@433
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124 WHERE "vote"."first_preference"
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jbe@433
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125 GROUP BY "vote"."initiative_id"
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jbe@433
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126 ) AS "subquery"
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jbe@433
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127 WHERE "initiative"."issue_id" = "issue_id_p"
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jbe@433
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128 AND "initiative"."admitted"
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jbe@433
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129 AND "initiative"."id" = "subquery"."initiative_id";
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jbe@433
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130 -- copy "positive_votes" and "negative_votes" from "battle" table:
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jbe@433
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131 UPDATE "initiative" SET
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jbe@433
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132 "positive_votes" = "battle_win"."count",
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jbe@433
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133 "negative_votes" = "battle_lose"."count"
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jbe@433
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134 FROM "battle" AS "battle_win", "battle" AS "battle_lose"
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jbe@433
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135 WHERE
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jbe@433
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136 "battle_win"."issue_id" = "issue_id_p" AND
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jbe@433
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137 "battle_win"."winning_initiative_id" = "initiative"."id" AND
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jbe@433
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138 "battle_win"."losing_initiative_id" ISNULL AND
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139 "battle_lose"."issue_id" = "issue_id_p" AND
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jbe@433
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140 "battle_lose"."losing_initiative_id" = "initiative"."id" AND
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141 "battle_lose"."winning_initiative_id" ISNULL;
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jbe@433
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142 END;
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jbe@433
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143 $$;
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jbe@433
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144
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jbe@433
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145
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jbe@430
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146 DROP FUNCTION "calculate_ranks"("issue"."id"%TYPE);
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jbe@430
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147 DROP FUNCTION "defeat_strength"(INT4, INT4);
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148
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149
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jbe@430
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150 CREATE FUNCTION "defeat_strength"
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jbe@430
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151 ( "positive_votes_p" INT4,
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152 "negative_votes_p" INT4,
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jbe@430
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153 "defeat_strength_p" "defeat_strength" )
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jbe@430
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154 RETURNS INT8
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jbe@430
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155 LANGUAGE 'plpgsql' IMMUTABLE AS $$
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jbe@430
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156 BEGIN
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jbe@430
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157 IF "defeat_strength_p" = 'simple'::"defeat_strength" THEN
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158 IF "positive_votes_p" > "negative_votes_p" THEN
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jbe@430
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159 RETURN "positive_votes_p";
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jbe@430
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160 ELSE
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jbe@430
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161 RETURN 0;
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jbe@430
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162 END IF;
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jbe@430
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163 ELSE
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jbe@430
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164 IF "positive_votes_p" > "negative_votes_p" THEN
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jbe@430
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165 RETURN ("positive_votes_p"::INT8 << 31) - "negative_votes_p"::INT8;
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jbe@430
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166 ELSIF "positive_votes_p" = "negative_votes_p" THEN
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jbe@430
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167 RETURN 0;
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jbe@430
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168 ELSE
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jbe@430
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169 RETURN -1;
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jbe@430
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170 END IF;
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jbe@430
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171 END IF;
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jbe@430
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172 END;
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jbe@430
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173 $$;
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jbe@430
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174
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jbe@430
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175 COMMENT ON FUNCTION "defeat_strength"(INT4, INT4, "defeat_strength") IS 'Calculates defeat strength (INT8!) according to the "defeat_strength" option (see comment on type "defeat_strength")';
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176
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177
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jbe@430
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178 CREATE FUNCTION "secondary_link_strength"
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jbe@430
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179 ( "initiative1_ord_p" INT4,
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180 "initiative2_ord_p" INT4,
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jbe@430
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181 "tie_breaking_p" "tie_breaking" )
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jbe@430
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182 RETURNS INT8
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jbe@430
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183 LANGUAGE 'plpgsql' IMMUTABLE AS $$
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jbe@430
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184 BEGIN
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jbe@430
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185 IF "initiative1_ord_p" = "initiative2_ord_p" THEN
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186 RAISE EXCEPTION 'Identical initiative ids passed to "secondary_link_strength" function (should not happen)';
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jbe@430
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187 END IF;
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jbe@430
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188 RETURN (
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jbe@430
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189 CASE WHEN "tie_breaking_p" = 'simple'::"tie_breaking" THEN
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jbe@430
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190 0
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jbe@430
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191 ELSE
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jbe@430
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192 CASE WHEN "initiative1_ord_p" < "initiative2_ord_p" THEN
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jbe@430
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193 1::INT8 << 62
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jbe@430
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194 ELSE 0 END
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jbe@430
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195 +
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jbe@430
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196 CASE WHEN "tie_breaking_p" = 'variant2'::"tie_breaking" THEN
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jbe@430
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197 ("initiative2_ord_p"::INT8 << 31) - "initiative1_ord_p"::INT8
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jbe@430
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198 ELSE
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jbe@430
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199 "initiative2_ord_p"::INT8 - ("initiative1_ord_p"::INT8 << 31)
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jbe@430
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200 END
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jbe@430
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201 END
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jbe@430
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202 );
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jbe@430
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203 END;
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jbe@430
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204 $$;
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jbe@430
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205
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jbe@430
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206 COMMENT ON FUNCTION "secondary_link_strength"(INT4, INT4, "tie_breaking") IS 'Calculates a secondary criterion for the defeat strength (tie-breaking of the links)';
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207
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jbe@430
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208
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jbe@430
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209 CREATE TYPE "link_strength" AS (
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210 "primary" INT8,
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211 "secondary" INT8 );
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212
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jbe@430
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213 COMMENT ON TYPE "link_strength" IS 'Type to store the defeat strength of a link between two candidates plus a secondary criterion to create unique link strengths between the candidates (needed for tie-breaking ''variant1'' and ''variant2'')';
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jbe@430
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214
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jbe@430
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215
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jbe@430
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216 CREATE FUNCTION "find_best_paths"("matrix_d" "link_strength"[][])
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jbe@430
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217 RETURNS "link_strength"[][]
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jbe@430
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218 LANGUAGE 'plpgsql' IMMUTABLE AS $$
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jbe@430
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219 DECLARE
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jbe@430
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220 "dimension_v" INT4;
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jbe@430
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221 "matrix_p" "link_strength"[][];
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jbe@430
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222 "i" INT4;
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jbe@430
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223 "j" INT4;
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jbe@430
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224 "k" INT4;
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jbe@430
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225 BEGIN
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jbe@430
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226 "dimension_v" := array_upper("matrix_d", 1);
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jbe@430
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227 "matrix_p" := "matrix_d";
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jbe@430
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228 "i" := 1;
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jbe@430
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229 LOOP
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jbe@430
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230 "j" := 1;
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jbe@430
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231 LOOP
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jbe@430
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232 IF "i" != "j" THEN
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jbe@430
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233 "k" := 1;
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jbe@430
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234 LOOP
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jbe@430
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235 IF "i" != "k" AND "j" != "k" THEN
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jbe@430
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236 IF "matrix_p"["j"]["i"] < "matrix_p"["i"]["k"] THEN
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jbe@430
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237 IF "matrix_p"["j"]["i"] > "matrix_p"["j"]["k"] THEN
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jbe@430
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238 "matrix_p"["j"]["k"] := "matrix_p"["j"]["i"];
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jbe@430
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239 END IF;
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jbe@430
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240 ELSE
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jbe@430
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241 IF "matrix_p"["i"]["k"] > "matrix_p"["j"]["k"] THEN
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jbe@430
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242 "matrix_p"["j"]["k"] := "matrix_p"["i"]["k"];
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jbe@430
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243 END IF;
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jbe@430
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244 END IF;
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jbe@430
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245 END IF;
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jbe@430
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246 EXIT WHEN "k" = "dimension_v";
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jbe@430
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247 "k" := "k" + 1;
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jbe@430
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248 END LOOP;
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jbe@430
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249 END IF;
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jbe@430
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250 EXIT WHEN "j" = "dimension_v";
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jbe@430
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251 "j" := "j" + 1;
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jbe@430
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252 END LOOP;
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jbe@430
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253 EXIT WHEN "i" = "dimension_v";
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jbe@430
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254 "i" := "i" + 1;
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jbe@430
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255 END LOOP;
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jbe@430
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256 RETURN "matrix_p";
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jbe@430
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257 END;
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jbe@430
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258 $$;
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jbe@430
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259
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jbe@430
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260 COMMENT ON FUNCTION "find_best_paths"("link_strength"[][]) IS 'Computes the strengths of the best beat-paths from a square matrix';
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jbe@430
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261
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jbe@430
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262
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jbe@430
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263 CREATE FUNCTION "calculate_ranks"("issue_id_p" "issue"."id"%TYPE)
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jbe@430
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264 RETURNS VOID
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jbe@430
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265 LANGUAGE 'plpgsql' VOLATILE AS $$
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jbe@430
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266 DECLARE
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jbe@430
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267 "issue_row" "issue"%ROWTYPE;
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jbe@430
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268 "policy_row" "policy"%ROWTYPE;
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jbe@430
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269 "dimension_v" INT4;
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jbe@430
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270 "matrix_a" INT4[][]; -- absolute votes
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jbe@430
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271 "matrix_d" "link_strength"[][]; -- defeat strength (direct)
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jbe@430
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272 "matrix_p" "link_strength"[][]; -- defeat strength (best path)
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jbe@430
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273 "matrix_t" "link_strength"[][]; -- defeat strength (tie-breaking)
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jbe@430
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274 "matrix_f" BOOLEAN[][]; -- forbidden link (tie-breaking)
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jbe@430
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275 "matrix_b" BOOLEAN[][]; -- final order (who beats who)
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jbe@430
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276 "i" INT4;
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277 "j" INT4;
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jbe@430
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278 "m" INT4;
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jbe@430
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279 "n" INT4;
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jbe@430
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280 "battle_row" "battle"%ROWTYPE;
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jbe@430
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281 "rank_ary" INT4[];
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jbe@430
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282 "rank_v" INT4;
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jbe@430
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283 "initiative_id_v" "initiative"."id"%TYPE;
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jbe@430
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284 BEGIN
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jbe@430
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285 PERFORM "require_transaction_isolation"();
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jbe@430
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286 SELECT * INTO "issue_row"
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jbe@430
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287 FROM "issue" WHERE "id" = "issue_id_p";
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jbe@430
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288 SELECT * INTO "policy_row"
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jbe@430
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289 FROM "policy" WHERE "id" = "issue_row"."policy_id";
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jbe@430
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290 SELECT count(1) INTO "dimension_v"
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jbe@430
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291 FROM "battle_participant" WHERE "issue_id" = "issue_id_p";
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jbe@430
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292 -- create "matrix_a" with absolute number of votes in pairwise
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jbe@430
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293 -- comparison:
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jbe@430
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294 "matrix_a" := array_fill(NULL::INT4, ARRAY["dimension_v", "dimension_v"]);
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jbe@430
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295 "i" := 1;
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jbe@430
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296 "j" := 2;
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jbe@430
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297 FOR "battle_row" IN
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jbe@430
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298 SELECT * FROM "battle" WHERE "issue_id" = "issue_id_p"
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jbe@430
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299 ORDER BY
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jbe@430
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300 "winning_initiative_id" NULLS FIRST,
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jbe@430
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301 "losing_initiative_id" NULLS FIRST
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jbe@430
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302 LOOP
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jbe@430
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303 "matrix_a"["i"]["j"] := "battle_row"."count";
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jbe@430
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304 IF "j" = "dimension_v" THEN
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jbe@430
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305 "i" := "i" + 1;
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jbe@430
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306 "j" := 1;
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jbe@430
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307 ELSE
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jbe@430
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308 "j" := "j" + 1;
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jbe@430
|
309 IF "j" = "i" THEN
|
jbe@430
|
310 "j" := "j" + 1;
|
jbe@430
|
311 END IF;
|
jbe@430
|
312 END IF;
|
jbe@430
|
313 END LOOP;
|
jbe@430
|
314 IF "i" != "dimension_v" OR "j" != "dimension_v" + 1 THEN
|
jbe@430
|
315 RAISE EXCEPTION 'Wrong battle count (should not happen)';
|
jbe@430
|
316 END IF;
|
jbe@430
|
317 -- store direct defeat strengths in "matrix_d" using "defeat_strength"
|
jbe@430
|
318 -- and "secondary_link_strength" functions:
|
jbe@430
|
319 "matrix_d" := array_fill(NULL::INT8, ARRAY["dimension_v", "dimension_v"]);
|
jbe@430
|
320 "i" := 1;
|
jbe@430
|
321 LOOP
|
jbe@430
|
322 "j" := 1;
|
jbe@430
|
323 LOOP
|
jbe@430
|
324 IF "i" != "j" THEN
|
jbe@430
|
325 "matrix_d"["i"]["j"] := (
|
jbe@430
|
326 "defeat_strength"(
|
jbe@430
|
327 "matrix_a"["i"]["j"],
|
jbe@430
|
328 "matrix_a"["j"]["i"],
|
jbe@430
|
329 "policy_row"."defeat_strength"
|
jbe@430
|
330 ),
|
jbe@430
|
331 "secondary_link_strength"(
|
jbe@430
|
332 "i",
|
jbe@430
|
333 "j",
|
jbe@430
|
334 "policy_row"."tie_breaking"
|
jbe@430
|
335 )
|
jbe@430
|
336 )::"link_strength";
|
jbe@430
|
337 END IF;
|
jbe@430
|
338 EXIT WHEN "j" = "dimension_v";
|
jbe@430
|
339 "j" := "j" + 1;
|
jbe@430
|
340 END LOOP;
|
jbe@430
|
341 EXIT WHEN "i" = "dimension_v";
|
jbe@430
|
342 "i" := "i" + 1;
|
jbe@430
|
343 END LOOP;
|
jbe@430
|
344 -- find best paths:
|
jbe@430
|
345 "matrix_p" := "find_best_paths"("matrix_d");
|
jbe@430
|
346 -- create partial order:
|
jbe@430
|
347 "matrix_b" := array_fill(NULL::BOOLEAN, ARRAY["dimension_v", "dimension_v"]);
|
jbe@430
|
348 "i" := 1;
|
jbe@430
|
349 LOOP
|
jbe@430
|
350 "j" := "i" + 1;
|
jbe@430
|
351 LOOP
|
jbe@430
|
352 IF "i" != "j" THEN
|
jbe@430
|
353 IF "matrix_p"["i"]["j"] > "matrix_p"["j"]["i"] THEN
|
jbe@430
|
354 "matrix_b"["i"]["j"] := TRUE;
|
jbe@430
|
355 "matrix_b"["j"]["i"] := FALSE;
|
jbe@430
|
356 ELSIF "matrix_p"["i"]["j"] < "matrix_p"["j"]["i"] THEN
|
jbe@430
|
357 "matrix_b"["i"]["j"] := FALSE;
|
jbe@430
|
358 "matrix_b"["j"]["i"] := TRUE;
|
jbe@430
|
359 END IF;
|
jbe@430
|
360 END IF;
|
jbe@430
|
361 EXIT WHEN "j" = "dimension_v";
|
jbe@430
|
362 "j" := "j" + 1;
|
jbe@430
|
363 END LOOP;
|
jbe@430
|
364 EXIT WHEN "i" = "dimension_v" - 1;
|
jbe@430
|
365 "i" := "i" + 1;
|
jbe@430
|
366 END LOOP;
|
jbe@430
|
367 -- tie-breaking by forbidding shared weakest links in beat-paths
|
jbe@430
|
368 -- (unless "tie_breaking" is set to 'simple', in which case tie-breaking
|
jbe@430
|
369 -- is performed later by initiative id):
|
jbe@430
|
370 IF "policy_row"."tie_breaking" != 'simple'::"tie_breaking" THEN
|
jbe@430
|
371 "m" := 1;
|
jbe@430
|
372 LOOP
|
jbe@430
|
373 "n" := "m" + 1;
|
jbe@430
|
374 LOOP
|
jbe@430
|
375 -- only process those candidates m and n, which are tied:
|
jbe@430
|
376 IF "matrix_b"["m"]["n"] ISNULL THEN
|
jbe@430
|
377 -- start with beat-paths prior tie-breaking:
|
jbe@430
|
378 "matrix_t" := "matrix_p";
|
jbe@430
|
379 -- start with all links allowed:
|
jbe@430
|
380 "matrix_f" := array_fill(FALSE, ARRAY["dimension_v", "dimension_v"]);
|
jbe@430
|
381 LOOP
|
jbe@430
|
382 -- determine (and forbid) that link that is the weakest link
|
jbe@430
|
383 -- in both the best path from candidate m to candidate n and
|
jbe@430
|
384 -- from candidate n to candidate m:
|
jbe@430
|
385 "i" := 1;
|
jbe@430
|
386 <<forbid_one_link>>
|
jbe@430
|
387 LOOP
|
jbe@430
|
388 "j" := 1;
|
jbe@430
|
389 LOOP
|
jbe@430
|
390 IF "i" != "j" THEN
|
jbe@430
|
391 IF "matrix_d"["i"]["j"] = "matrix_t"["m"]["n"] THEN
|
jbe@430
|
392 "matrix_f"["i"]["j"] := TRUE;
|
jbe@430
|
393 -- exit for performance reasons,
|
jbe@430
|
394 -- as exactly one link will be found:
|
jbe@430
|
395 EXIT forbid_one_link;
|
jbe@430
|
396 END IF;
|
jbe@430
|
397 END IF;
|
jbe@430
|
398 EXIT WHEN "j" = "dimension_v";
|
jbe@430
|
399 "j" := "j" + 1;
|
jbe@430
|
400 END LOOP;
|
jbe@430
|
401 IF "i" = "dimension_v" THEN
|
jbe@430
|
402 RAISE EXCEPTION 'Did not find shared weakest link for tie-breaking (should not happen)';
|
jbe@430
|
403 END IF;
|
jbe@430
|
404 "i" := "i" + 1;
|
jbe@430
|
405 END LOOP;
|
jbe@430
|
406 -- calculate best beat-paths while ignoring forbidden links:
|
jbe@430
|
407 "i" := 1;
|
jbe@430
|
408 LOOP
|
jbe@430
|
409 "j" := 1;
|
jbe@430
|
410 LOOP
|
jbe@430
|
411 IF "i" != "j" THEN
|
jbe@430
|
412 "matrix_t"["i"]["j"] := CASE
|
jbe@430
|
413 WHEN "matrix_f"["i"]["j"]
|
jbe@432
|
414 THEN ((-1::INT8) << 63, 0)::"link_strength" -- worst possible value
|
jbe@430
|
415 ELSE "matrix_d"["i"]["j"] END;
|
jbe@430
|
416 END IF;
|
jbe@430
|
417 EXIT WHEN "j" = "dimension_v";
|
jbe@430
|
418 "j" := "j" + 1;
|
jbe@430
|
419 END LOOP;
|
jbe@430
|
420 EXIT WHEN "i" = "dimension_v";
|
jbe@430
|
421 "i" := "i" + 1;
|
jbe@430
|
422 END LOOP;
|
jbe@430
|
423 "matrix_t" := "find_best_paths"("matrix_t");
|
jbe@430
|
424 -- extend partial order, if tie-breaking was successful:
|
jbe@430
|
425 IF "matrix_t"["m"]["n"] > "matrix_t"["n"]["m"] THEN
|
jbe@430
|
426 "matrix_b"["m"]["n"] := TRUE;
|
jbe@430
|
427 "matrix_b"["n"]["m"] := FALSE;
|
jbe@430
|
428 EXIT;
|
jbe@430
|
429 ELSIF "matrix_t"["m"]["n"] < "matrix_t"["n"]["m"] THEN
|
jbe@430
|
430 "matrix_b"["m"]["n"] := FALSE;
|
jbe@430
|
431 "matrix_b"["n"]["m"] := TRUE;
|
jbe@430
|
432 EXIT;
|
jbe@430
|
433 END IF;
|
jbe@430
|
434 END LOOP;
|
jbe@430
|
435 END IF;
|
jbe@430
|
436 EXIT WHEN "n" = "dimension_v";
|
jbe@430
|
437 "n" := "n" + 1;
|
jbe@430
|
438 END LOOP;
|
jbe@430
|
439 EXIT WHEN "m" = "dimension_v" - 1;
|
jbe@430
|
440 "m" := "m" + 1;
|
jbe@430
|
441 END LOOP;
|
jbe@430
|
442 END IF;
|
jbe@430
|
443 -- store a unique ranking in "rank_ary":
|
jbe@430
|
444 "rank_ary" := array_fill(NULL::INT4, ARRAY["dimension_v"]);
|
jbe@430
|
445 "rank_v" := 1;
|
jbe@430
|
446 LOOP
|
jbe@430
|
447 "i" := 1;
|
jbe@430
|
448 <<assign_next_rank>>
|
jbe@430
|
449 LOOP
|
jbe@430
|
450 IF "rank_ary"["i"] ISNULL THEN
|
jbe@430
|
451 "j" := 1;
|
jbe@430
|
452 LOOP
|
jbe@430
|
453 IF
|
jbe@430
|
454 "i" != "j" AND
|
jbe@430
|
455 "rank_ary"["j"] ISNULL AND
|
jbe@430
|
456 ( "matrix_b"["j"]["i"] OR
|
jbe@430
|
457 -- tie-breaking by "id"
|
jbe@430
|
458 ( "matrix_b"["j"]["i"] ISNULL AND
|
jbe@430
|
459 "j" < "i" ) )
|
jbe@430
|
460 THEN
|
jbe@430
|
461 -- someone else is better
|
jbe@430
|
462 EXIT;
|
jbe@430
|
463 END IF;
|
jbe@430
|
464 IF "j" = "dimension_v" THEN
|
jbe@430
|
465 -- noone is better
|
jbe@430
|
466 "rank_ary"["i"] := "rank_v";
|
jbe@430
|
467 EXIT assign_next_rank;
|
jbe@430
|
468 END IF;
|
jbe@430
|
469 "j" := "j" + 1;
|
jbe@430
|
470 END LOOP;
|
jbe@430
|
471 END IF;
|
jbe@430
|
472 "i" := "i" + 1;
|
jbe@430
|
473 IF "i" > "dimension_v" THEN
|
jbe@430
|
474 RAISE EXCEPTION 'Schulze ranking does not compute (should not happen)';
|
jbe@430
|
475 END IF;
|
jbe@430
|
476 END LOOP;
|
jbe@430
|
477 EXIT WHEN "rank_v" = "dimension_v";
|
jbe@430
|
478 "rank_v" := "rank_v" + 1;
|
jbe@430
|
479 END LOOP;
|
jbe@430
|
480 -- write preliminary results:
|
jbe@430
|
481 "i" := 2; -- omit status quo with "i" = 1
|
jbe@430
|
482 FOR "initiative_id_v" IN
|
jbe@430
|
483 SELECT "id" FROM "initiative"
|
jbe@430
|
484 WHERE "issue_id" = "issue_id_p" AND "admitted"
|
jbe@430
|
485 ORDER BY "id"
|
jbe@430
|
486 LOOP
|
jbe@430
|
487 UPDATE "initiative" SET
|
jbe@430
|
488 "direct_majority" =
|
jbe@430
|
489 CASE WHEN "policy_row"."direct_majority_strict" THEN
|
jbe@430
|
490 "positive_votes" * "policy_row"."direct_majority_den" >
|
jbe@430
|
491 "policy_row"."direct_majority_num" * ("positive_votes"+"negative_votes")
|
jbe@430
|
492 ELSE
|
jbe@430
|
493 "positive_votes" * "policy_row"."direct_majority_den" >=
|
jbe@430
|
494 "policy_row"."direct_majority_num" * ("positive_votes"+"negative_votes")
|
jbe@430
|
495 END
|
jbe@430
|
496 AND "positive_votes" >= "policy_row"."direct_majority_positive"
|
jbe@430
|
497 AND "issue_row"."voter_count"-"negative_votes" >=
|
jbe@430
|
498 "policy_row"."direct_majority_non_negative",
|
jbe@430
|
499 "indirect_majority" =
|
jbe@430
|
500 CASE WHEN "policy_row"."indirect_majority_strict" THEN
|
jbe@430
|
501 "positive_votes" * "policy_row"."indirect_majority_den" >
|
jbe@430
|
502 "policy_row"."indirect_majority_num" * ("positive_votes"+"negative_votes")
|
jbe@430
|
503 ELSE
|
jbe@430
|
504 "positive_votes" * "policy_row"."indirect_majority_den" >=
|
jbe@430
|
505 "policy_row"."indirect_majority_num" * ("positive_votes"+"negative_votes")
|
jbe@430
|
506 END
|
jbe@430
|
507 AND "positive_votes" >= "policy_row"."indirect_majority_positive"
|
jbe@430
|
508 AND "issue_row"."voter_count"-"negative_votes" >=
|
jbe@430
|
509 "policy_row"."indirect_majority_non_negative",
|
jbe@430
|
510 "schulze_rank" = "rank_ary"["i"],
|
jbe@430
|
511 "better_than_status_quo" = "rank_ary"["i"] < "rank_ary"[1],
|
jbe@430
|
512 "worse_than_status_quo" = "rank_ary"["i"] > "rank_ary"[1],
|
jbe@430
|
513 "multistage_majority" = "rank_ary"["i"] >= "rank_ary"[1],
|
jbe@430
|
514 "reverse_beat_path" = CASE WHEN "policy_row"."defeat_strength" = 'simple'::"defeat_strength"
|
jbe@430
|
515 THEN NULL
|
jbe@430
|
516 ELSE "matrix_p"[1]["i"]."primary" >= 0 END,
|
jbe@430
|
517 "eligible" = FALSE,
|
jbe@430
|
518 "winner" = FALSE,
|
jbe@430
|
519 "rank" = NULL -- NOTE: in cases of manual reset of issue state
|
jbe@430
|
520 WHERE "id" = "initiative_id_v";
|
jbe@430
|
521 "i" := "i" + 1;
|
jbe@430
|
522 END LOOP;
|
jbe@430
|
523 IF "i" != "dimension_v" + 1 THEN
|
jbe@430
|
524 RAISE EXCEPTION 'Wrong winner count (should not happen)';
|
jbe@430
|
525 END IF;
|
jbe@430
|
526 -- take indirect majorities into account:
|
jbe@430
|
527 LOOP
|
jbe@430
|
528 UPDATE "initiative" SET "indirect_majority" = TRUE
|
jbe@430
|
529 FROM (
|
jbe@430
|
530 SELECT "new_initiative"."id" AS "initiative_id"
|
jbe@430
|
531 FROM "initiative" "old_initiative"
|
jbe@430
|
532 JOIN "initiative" "new_initiative"
|
jbe@430
|
533 ON "new_initiative"."issue_id" = "issue_id_p"
|
jbe@430
|
534 AND "new_initiative"."indirect_majority" = FALSE
|
jbe@430
|
535 JOIN "battle" "battle_win"
|
jbe@430
|
536 ON "battle_win"."issue_id" = "issue_id_p"
|
jbe@430
|
537 AND "battle_win"."winning_initiative_id" = "new_initiative"."id"
|
jbe@430
|
538 AND "battle_win"."losing_initiative_id" = "old_initiative"."id"
|
jbe@430
|
539 JOIN "battle" "battle_lose"
|
jbe@430
|
540 ON "battle_lose"."issue_id" = "issue_id_p"
|
jbe@430
|
541 AND "battle_lose"."losing_initiative_id" = "new_initiative"."id"
|
jbe@430
|
542 AND "battle_lose"."winning_initiative_id" = "old_initiative"."id"
|
jbe@430
|
543 WHERE "old_initiative"."issue_id" = "issue_id_p"
|
jbe@430
|
544 AND "old_initiative"."indirect_majority" = TRUE
|
jbe@430
|
545 AND CASE WHEN "policy_row"."indirect_majority_strict" THEN
|
jbe@430
|
546 "battle_win"."count" * "policy_row"."indirect_majority_den" >
|
jbe@430
|
547 "policy_row"."indirect_majority_num" *
|
jbe@430
|
548 ("battle_win"."count"+"battle_lose"."count")
|
jbe@430
|
549 ELSE
|
jbe@430
|
550 "battle_win"."count" * "policy_row"."indirect_majority_den" >=
|
jbe@430
|
551 "policy_row"."indirect_majority_num" *
|
jbe@430
|
552 ("battle_win"."count"+"battle_lose"."count")
|
jbe@430
|
553 END
|
jbe@430
|
554 AND "battle_win"."count" >= "policy_row"."indirect_majority_positive"
|
jbe@430
|
555 AND "issue_row"."voter_count"-"battle_lose"."count" >=
|
jbe@430
|
556 "policy_row"."indirect_majority_non_negative"
|
jbe@430
|
557 ) AS "subquery"
|
jbe@430
|
558 WHERE "id" = "subquery"."initiative_id";
|
jbe@430
|
559 EXIT WHEN NOT FOUND;
|
jbe@430
|
560 END LOOP;
|
jbe@430
|
561 -- set "multistage_majority" for remaining matching initiatives:
|
jbe@430
|
562 UPDATE "initiative" SET "multistage_majority" = TRUE
|
jbe@430
|
563 FROM (
|
jbe@430
|
564 SELECT "losing_initiative"."id" AS "initiative_id"
|
jbe@430
|
565 FROM "initiative" "losing_initiative"
|
jbe@430
|
566 JOIN "initiative" "winning_initiative"
|
jbe@430
|
567 ON "winning_initiative"."issue_id" = "issue_id_p"
|
jbe@430
|
568 AND "winning_initiative"."admitted"
|
jbe@430
|
569 JOIN "battle" "battle_win"
|
jbe@430
|
570 ON "battle_win"."issue_id" = "issue_id_p"
|
jbe@430
|
571 AND "battle_win"."winning_initiative_id" = "winning_initiative"."id"
|
jbe@430
|
572 AND "battle_win"."losing_initiative_id" = "losing_initiative"."id"
|
jbe@430
|
573 JOIN "battle" "battle_lose"
|
jbe@430
|
574 ON "battle_lose"."issue_id" = "issue_id_p"
|
jbe@430
|
575 AND "battle_lose"."losing_initiative_id" = "winning_initiative"."id"
|
jbe@430
|
576 AND "battle_lose"."winning_initiative_id" = "losing_initiative"."id"
|
jbe@430
|
577 WHERE "losing_initiative"."issue_id" = "issue_id_p"
|
jbe@430
|
578 AND "losing_initiative"."admitted"
|
jbe@430
|
579 AND "winning_initiative"."schulze_rank" <
|
jbe@430
|
580 "losing_initiative"."schulze_rank"
|
jbe@430
|
581 AND "battle_win"."count" > "battle_lose"."count"
|
jbe@430
|
582 AND (
|
jbe@430
|
583 "battle_win"."count" > "winning_initiative"."positive_votes" OR
|
jbe@430
|
584 "battle_lose"."count" < "losing_initiative"."negative_votes" )
|
jbe@430
|
585 ) AS "subquery"
|
jbe@430
|
586 WHERE "id" = "subquery"."initiative_id";
|
jbe@430
|
587 -- mark eligible initiatives:
|
jbe@430
|
588 UPDATE "initiative" SET "eligible" = TRUE
|
jbe@430
|
589 WHERE "issue_id" = "issue_id_p"
|
jbe@430
|
590 AND "initiative"."direct_majority"
|
jbe@430
|
591 AND "initiative"."indirect_majority"
|
jbe@430
|
592 AND "initiative"."better_than_status_quo"
|
jbe@430
|
593 AND (
|
jbe@430
|
594 "policy_row"."no_multistage_majority" = FALSE OR
|
jbe@430
|
595 "initiative"."multistage_majority" = FALSE )
|
jbe@430
|
596 AND (
|
jbe@430
|
597 "policy_row"."no_reverse_beat_path" = FALSE OR
|
jbe@430
|
598 coalesce("initiative"."reverse_beat_path", FALSE) = FALSE );
|
jbe@430
|
599 -- mark final winner:
|
jbe@430
|
600 UPDATE "initiative" SET "winner" = TRUE
|
jbe@430
|
601 FROM (
|
jbe@430
|
602 SELECT "id" AS "initiative_id"
|
jbe@430
|
603 FROM "initiative"
|
jbe@430
|
604 WHERE "issue_id" = "issue_id_p" AND "eligible"
|
jbe@430
|
605 ORDER BY
|
jbe@430
|
606 "schulze_rank",
|
jbe@430
|
607 "id"
|
jbe@430
|
608 LIMIT 1
|
jbe@430
|
609 ) AS "subquery"
|
jbe@430
|
610 WHERE "id" = "subquery"."initiative_id";
|
jbe@430
|
611 -- write (final) ranks:
|
jbe@430
|
612 "rank_v" := 1;
|
jbe@430
|
613 FOR "initiative_id_v" IN
|
jbe@430
|
614 SELECT "id"
|
jbe@430
|
615 FROM "initiative"
|
jbe@430
|
616 WHERE "issue_id" = "issue_id_p" AND "admitted"
|
jbe@430
|
617 ORDER BY
|
jbe@430
|
618 "winner" DESC,
|
jbe@430
|
619 "eligible" DESC,
|
jbe@430
|
620 "schulze_rank",
|
jbe@430
|
621 "id"
|
jbe@430
|
622 LOOP
|
jbe@430
|
623 UPDATE "initiative" SET "rank" = "rank_v"
|
jbe@430
|
624 WHERE "id" = "initiative_id_v";
|
jbe@430
|
625 "rank_v" := "rank_v" + 1;
|
jbe@430
|
626 END LOOP;
|
jbe@430
|
627 -- set schulze rank of status quo and mark issue as finished:
|
jbe@430
|
628 UPDATE "issue" SET
|
jbe@430
|
629 "status_quo_schulze_rank" = "rank_ary"[1],
|
jbe@430
|
630 "state" =
|
jbe@430
|
631 CASE WHEN EXISTS (
|
jbe@430
|
632 SELECT NULL FROM "initiative"
|
jbe@430
|
633 WHERE "issue_id" = "issue_id_p" AND "winner"
|
jbe@430
|
634 ) THEN
|
jbe@430
|
635 'finished_with_winner'::"issue_state"
|
jbe@430
|
636 ELSE
|
jbe@430
|
637 'finished_without_winner'::"issue_state"
|
jbe@430
|
638 END,
|
jbe@430
|
639 "closed" = "phase_finished",
|
jbe@430
|
640 "phase_finished" = NULL
|
jbe@430
|
641 WHERE "id" = "issue_id_p";
|
jbe@430
|
642 RETURN;
|
jbe@430
|
643 END;
|
jbe@430
|
644 $$;
|
jbe@430
|
645
|
jbe@423
|
646
|
jbe@423
|
647 COMMIT;
|