27 lines
1.3 KiB
MySQL
27 lines
1.3 KiB
MySQL
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-- OBMP analytics materialized views
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--
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-- Applied to the live database and version-controlled here for reproducibility.
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-- Safe to run against an empty database at init time: the view is created empty
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-- and the pg_cron job below populates/refreshes it hourly.
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-- AS adjacency: every undirected pair of consecutive ASes in an observed AS_PATH,
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-- with an occurrence count. Backs the AS Relationship Map dashboard so its panels
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-- read a 17k-row view instead of exploding ~4.4M base_attrs rows live.
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CREATE MATERIALIZED VIEW IF NOT EXISTS mv_as_adjacency AS
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SELECT LEAST(a.asn, b.asn) AS asn_a,
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GREATEST(a.asn, b.asn) AS asn_b,
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COUNT(*) AS occ
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FROM base_attrs ba
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CROSS JOIN LATERAL unnest(ba.as_path) WITH ORDINALITY a(asn, ord)
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JOIN LATERAL unnest(ba.as_path) WITH ORDINALITY b(asn, ord) ON b.ord = a.ord + 1
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WHERE ba.as_path_count >= 2 AND a.asn <> b.asn
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GROUP BY 1, 2;
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-- Unique index required for REFRESH ... CONCURRENTLY (no read lock during refresh).
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CREATE UNIQUE INDEX IF NOT EXISTS mv_as_adjacency_pair_idx ON mv_as_adjacency (asn_a, asn_b);
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CREATE INDEX IF NOT EXISTS mv_as_adjacency_occ_idx ON mv_as_adjacency (occ DESC);
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-- Refresh hourly at minute 23.
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SELECT cron.schedule('refresh-mv-as-adjacency', '23 * * * *',
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'REFRESH MATERIALIZED VIEW CONCURRENTLY mv_as_adjacency');
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