jared
fefd4fe969
total adds an intergovernmental leg (M = to local, L = to state) as a UNION ALL over new ig_annotated views. The IG leg deliberately skips NOT is_aggregate -- legacy IG lives almost entirely on aggregate rows, and the aggregate codes are year-disjoint from their modern leaf components, so nothing double-counts. L-- (the IG-to-state family total) is excluded. direct is the default and is numerically unchanged.
13 lines
666 B
SQL
13 lines
666 B
SQL
-- Harmonized-basis IG rows. Uses COALESCE(harmonized_code, item_code) rather
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-- than harmonized_code alone: aggregate rows carry NO harmonized_code by
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-- construction (harmonized space is leaf-only), so a plain
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-- `harmonized_code IS NOT NULL` filter would drop every legacy IG aggregate --
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-- 6.4e9 of M and 3.1e8 of L in corpus units. COALESCE keeps the one real IG
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-- collapse rule (M38 -> M36, SB012, year-disjoint 1967-2011 vs 2012+) while
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-- never dropping a row.
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CREATE OR REPLACE VIEW ig_long_harmonized AS
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SELECT * REPLACE (COALESCE(harmonized_code, item_code) AS item_code)
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FROM long
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WHERE LEFT(item_code, 1) IN ('M', 'L')
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AND item_code NOT LIKE '%--';
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