60 lines
1.8 KiB
SQL
60 lines
1.8 KiB
SQL
create or replace function ems.fn_negative_price_predictions(p_site_id int)
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returns jsonb
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language sql
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stable
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as $fn$
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with hist as (
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select count(distinct (mip.interval_start at time zone 'Europe/Prague')::date)::int as ndays
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from ems.market_interval_price mip
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where mip.market_source in ('OTE_CZ', 'OTE_CZ_DAM')
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and mip.interval_start >= now() - interval '400 days'
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),
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rows as (
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select
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p.predicted_date,
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p.window_start_hour,
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p.window_end_hour,
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p.probability_pct,
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p.expected_min_price,
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p.reason
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from ems.predicted_negative_price_window p
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where p.site_id = p_site_id
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and p.predicted_date > (
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current_timestamp at time zone coalesce(
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nullif(trim((select s.timezone from ems.site s where s.id = p_site_id)), ''),
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'Europe/Prague'
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)
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)::date
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and p.predicted_date <= (
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current_timestamp at time zone coalesce(
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nullif(trim((select s.timezone from ems.site s where s.id = p_site_id)), ''),
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'Europe/Prague'
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)
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)::date + 7
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order by p.predicted_date, p.window_start_hour
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)
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select jsonb_build_object(
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'predictions',
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coalesce(
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(
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select jsonb_agg(
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jsonb_build_object(
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'predicted_date', r.predicted_date,
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'window_start_hour', r.window_start_hour,
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'window_end_hour', r.window_end_hour,
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'probability_pct', r.probability_pct,
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'expected_min_price', r.expected_min_price,
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'reason', coalesce(r.reason, '')
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)
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)
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from rows r
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),
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'[]'::jsonb
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),
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'insufficient_history', (select ndays < 28 from hist)
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);
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$fn$;
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comment on function ems.fn_negative_price_predictions(int) is
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'Predikovaná okna záporných cen + flag nedostatečné historie OTE.';
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