56 lines
2.1 KiB
MySQL
56 lines
2.1 KiB
MySQL
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-- we don't want to have to update our zap_rank views
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-- when constants change. so we'll just make a view that we can update
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CREATE OR REPLACE VIEW zap_rank_constants AS
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SELECT
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5000.0 AS boost_per_vote,
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1.2 AS vote_power,
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1.3 AS vote_decay,
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3.0 AS age_wait_hours,
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0.5 AS comment_scaler,
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2.2 AS boost_power,
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2.6 AS boost_decay,
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2100 AS row_limit;
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CREATE MATERIALIZED VIEW IF NOT EXISTS zap_rank_wwm_view AS
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SELECT id, rank() OVER (ORDER BY
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(
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(GREATEST("weightedVotes", POWER("weightedVotes", vote_power)) + "weightedComments"*comment_scaler)
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/
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POWER(GREATEST(age_wait_hours, EXTRACT(EPOCH FROM (now_utc() - created_at))/3600), vote_decay)
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+
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POWER(boost/boost_per_vote, boost_power)
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/
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POWER(GREATEST(age_wait_hours, EXTRACT(EPOCH FROM (now_utc() - created_at))/3600), boost_decay)
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) DESC NULLS LAST, id DESC) AS rank
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FROM "Item", zap_rank_constants
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WHERE "parentId" IS NULL
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AND NOT bio
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AND "pinId" IS NULL
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AND "deletedAt" IS NULL
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AND ("weightedVotes" > 0 OR boost > 0)
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ORDER BY rank ASC
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LIMIT (SELECT row_limit FROM zap_rank_constants);
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CREATE UNIQUE INDEX IF NOT EXISTS zap_rank_wwm_view_idx ON zap_rank_wwm_view(rank ASC);
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CREATE MATERIALIZED VIEW IF NOT EXISTS zap_rank_tender_view AS
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SELECT id, rank() OVER (ORDER BY
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(
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(GREATEST(ABS("weightedVotes" - "weightedDownVotes"), POWER(ABS("weightedVotes" - "weightedDownVotes"), vote_power)) + "weightedComments"*comment_scaler)
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/
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POWER(GREATEST(age_wait_hours, EXTRACT(EPOCH FROM (now_utc() - created_at))/3600), vote_decay)
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+
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POWER(boost/boost_per_vote, boost_power)
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/
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POWER(GREATEST(age_wait_hours, EXTRACT(EPOCH FROM (now_utc() - created_at))/3600), boost_decay)
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) DESC NULLS LAST, id DESC) AS rank
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FROM "Item", zap_rank_constants
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WHERE "parentId" IS NULL
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AND NOT bio
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AND "pinId" IS NULL
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AND "deletedAt" IS NULL
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AND ("weightedVotes" > "weightedDownVotes" OR boost > 0)
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ORDER BY rank ASC
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LIMIT (SELECT row_limit FROM zap_rank_constants);
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CREATE UNIQUE INDEX IF NOT EXISTS zap_rank_tender_view_idx ON zap_rank_tender_view(rank ASC);
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