83 lines
3.0 KiB
SQL
83 lines
3.0 KiB
SQL
CREATE OR ALTER FUNCTION pricing.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) = 0.05, -- e.g., 5%
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@cap_last_pct numeric(10,5) = 1.00, -- e.g., 100%
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@cap_list_pct numeric(10,5) = 1.00
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)
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RETURNS TABLE
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AS
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RETURN
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WITH params AS (
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SELECT
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@target AS base_price,
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@last_norm AS last_norm,
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@list_eff AS list_eff,
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@floor_pct AS floor_pct,
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@cap_last_pct AS cap_last_pct,
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-- HARD CEILING at list: clamp to <= 1.00 regardless of input
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CASE WHEN @cap_list_pct IS NULL OR @cap_list_pct > 1 THEN 1.00 ELSE @cap_list_pct END AS eff_list_cap
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),
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step_floor AS (
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SELECT
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base_price, last_norm, list_eff, floor_pct, cap_last_pct, eff_list_cap,
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CAST(
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CASE
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WHEN base_price IS NULL OR last_norm IS NULL OR floor_pct <= 0
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THEN base_price
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ELSE ROUND(IIF(base_price >= last_norm*(1-floor_pct), base_price, last_norm*(1-floor_pct)), 5)
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END
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AS numeric(20,5)) AS after_floor
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FROM params
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),
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step_cap_last AS (
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SELECT
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base_price, last_norm, list_eff, floor_pct, cap_last_pct, eff_list_cap, after_floor,
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CAST(
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CASE
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WHEN after_floor IS NULL OR last_norm IS NULL
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THEN after_floor
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ELSE ROUND(IIF(after_floor <= last_norm*cap_last_pct, after_floor, last_norm*cap_last_pct), 5)
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END
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AS numeric(20,5)) AS after_cap_last
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FROM step_floor
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),
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step_cap_list AS (
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SELECT
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base_price, last_norm, list_eff, floor_pct, cap_last_pct, eff_list_cap, after_floor, after_cap_last,
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CAST(
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CASE
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WHEN after_cap_last IS NULL OR list_eff IS NULL
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THEN after_cap_last
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ELSE ROUND(IIF(after_cap_last <= list_eff*eff_list_cap, after_cap_last, list_eff*eff_list_cap), 5)
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END
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AS numeric(20,5)) AS final_price
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FROM step_cap_last
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)
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SELECT
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final_price AS guidance_price,
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CASE
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WHEN @target IS NULL THEN 'No target price available'
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WHEN @last_norm IS NULL AND @list_eff IS NULL THEN 'No prior sale or list; using target price'
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ELSE
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CONCAT(
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'Using target price',
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-- show floor only if it raised price
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CASE WHEN last_norm IS NOT NULL AND @floor_pct > 0 AND after_floor > base_price
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THEN CONCAT(', floored to ', FORMAT(@floor_pct*100,'0.##'), '% below last price') ELSE '' END,
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-- show last cap only if it lowered price
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CASE WHEN last_norm IS NOT NULL AND after_cap_last < after_floor
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THEN CASE WHEN @cap_last_pct = 1
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THEN ', capped to not exceed last price'
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ELSE CONCAT(', capped to ', FORMAT(@cap_last_pct*100,'0.##'), '% of last price')
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END
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ELSE '' END,
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-- show list cap only if it lowered price (always “not exceed” because eff_list_cap<=1)
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CASE WHEN list_eff IS NOT NULL AND final_price < after_cap_last
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THEN ', capped to not exceed list price'
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ELSE '' END
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)
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END AS guidance_reason
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FROM step_cap_list; |