57 lines
1.6 KiB
PL/PgSQL
57 lines
1.6 KiB
PL/PgSQL
CREATE OR REPLACE FUNCTION pricequote.guidance_logic(
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_target numeric(20,5),
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_last_norm numeric(20,5),
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_list_eff numeric(20,5),
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_last_date date,
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_floor_pct numeric(10,5) DEFAULT 0.95,
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_cap_last_pct numeric(10,5) DEFAULT 1.00,
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_cap_list_pct numeric(10,5) DEFAULT 1.00
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)
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RETURNS TABLE (
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guidance_price numeric(20,5),
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guidance_reason text
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)
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LANGUAGE plpgsql AS $$
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DECLARE
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base_price numeric(20,5);
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after_floor numeric(20,5);
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after_cap_last numeric(20,5);
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final_price numeric(20,5);
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reason text := '';
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BEGIN
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-- Early exit if nothing to work with
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IF _target IS NULL AND _last_norm IS NULL AND _list_eff IS NULL THEN
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RETURN QUERY SELECT NULL::numeric, 'No target, last, or list available';
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RETURN;
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END IF;
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-- Pick starting base price
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base_price := COALESCE(_target, _last_norm, _list_eff);
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-- Reason text
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reason :=
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CASE
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WHEN _target IS NOT NULL THEN 'Using target price'
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WHEN _last_norm IS NOT NULL THEN 'Using last price as base'
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WHEN _list_eff IS NOT NULL THEN 'Using list price as base'
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END;
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-- Step 1: use base price less than last price, use last price
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IF base_price < _last_norm THEN
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base_price := _last_norm;
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reason := 'Last price';
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END IF;
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-- Step 2: use price from previous step but don't allow it to be x% above last price
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IF base_price > _list_eff THEN
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base_price := _list_eff;
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reason := 'List price ceiling';
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END IF;
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final_price := base_price;
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RETURN QUERY SELECT final_price, reason;
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END $$;
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