50 lines
1.3 KiB
Ruby
50 lines
1.3 KiB
Ruby
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# frozen_string_literal: true
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Sequel.migration do
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up do
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create_table(:currencies) do
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String :iso_code, primary_key: true
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column :start_date, :date, null: false
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column :end_date, :date, null: false
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end
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create_table(:currency_coverages) do
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String :provider_key, null: false
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String :iso_code, null: false
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primary_key [:provider_key, :iso_code]
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end
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# Backfill currencies from rates
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run <<~SQL
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INSERT INTO currencies (iso_code, start_date, end_date)
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SELECT iso_code, MIN(start_date), MAX(end_date)
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FROM (
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SELECT quote AS iso_code, MIN(date) AS start_date, MAX(date) AS end_date
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FROM rates GROUP BY quote
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UNION ALL
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SELECT base AS iso_code, MIN(date) AS start_date, MAX(date) AS end_date
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FROM rates GROUP BY base
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)
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GROUP BY iso_code
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ORDER BY iso_code
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SQL
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# Backfill currency_coverages from rates
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run <<~SQL
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INSERT INTO currency_coverages (provider_key, iso_code)
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SELECT provider, iso_code FROM (
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SELECT DISTINCT provider, quote AS iso_code FROM rates
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UNION
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SELECT DISTINCT provider, base AS iso_code FROM rates
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)
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ORDER BY provider, iso_code
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SQL
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end
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down do
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drop_table(:currency_coverages)
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drop_table(:currencies)
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end
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end
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