119 lines
3.3 KiB
Transact-SQL
119 lines
3.3 KiB
Transact-SQL
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-- This function returns the least of two NUMERIC(20,5) values.
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CREATE OR ALTER FUNCTION dbo.LEAST_NUMERIC205(
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@a NUMERIC(20,5),
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@b NUMERIC(20,5)
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)
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RETURNS NUMERIC(20,5)
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AS
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BEGIN
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RETURN CASE
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WHEN @a IS NULL THEN @b
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WHEN @b IS NULL THEN @a
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WHEN @a < @b THEN @a ELSE @b
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END
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END
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GO
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-- This function returns the greatest of two NUMERIC(20,5) values.
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CREATE OR ALTER FUNCTION dbo.GREATEST_NUMERIC205(
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@a NUMERIC(20,5),
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@b NUMERIC(20,5)
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)
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RETURNS NUMERIC(20,5)
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AS
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BEGIN
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RETURN CASE
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WHEN @a IS NULL THEN @b
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WHEN @b IS NULL THEN @a
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WHEN @a > @b THEN @a ELSE @b
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END
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END
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GO
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-- This function implements the guidance logic for pricing based on target, last, and list prices.
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CREATE OR ALTER FUNCTION pricing.guidance_logic (
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@target_price NUMERIC(20,5),
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@last_price NUMERIC(20,5),
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@list_price NUMERIC(20,5),
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@last_date DATE
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)
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RETURNS @result TABLE (
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guidance_price NUMERIC(20,5),
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guidance_reason NVARCHAR(MAX)
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)
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AS
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BEGIN
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DECLARE @price NUMERIC(20,5);
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DECLARE @reason NVARCHAR(MAX) = '';
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DECLARE @floored NUMERIC(20,5);
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DECLARE @capped NUMERIC(20,5);
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DECLARE @use_last_price BIT = 0;
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-- Determine if last price is recent (within last 2 years)
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IF @last_price IS NOT NULL AND @last_date IS NOT NULL AND @last_date > DATEADD(YEAR, -2, CAST(GETDATE() AS DATE))
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SET @use_last_price = 1;
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IF @target_price IS NOT NULL AND @use_last_price = 1
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BEGIN
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SET @floored = dbo.GREATEST_NUMERIC205(@target_price, @last_price * 0.95);
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SET @capped = dbo.LEAST_NUMERIC205(@floored, @last_price);
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SET @price = dbo.LEAST_NUMERIC205(ISNULL(@list_price, 1e9), @capped);
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IF @price = @last_price
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BEGIN
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SET @reason = 'Cap at last price';
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END
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ELSE
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BEGIN
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SET @reason = 'Using target price';
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IF @target_price < @last_price * 0.95
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SET @reason += ', floored to 5% below last price';
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IF @target_price > @last_price
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SET @reason += ', capped to not exceed last price';
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IF @list_price IS NOT NULL AND @price = @list_price AND @target_price > @list_price
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SET @reason += ', capped to not exceed list price';
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END
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END
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ELSE IF @use_last_price = 1
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BEGIN
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SET @price = @last_price;
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SET @reason = 'Last price - no target';
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END
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ELSE IF @target_price IS NOT NULL
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BEGIN
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SET @price = @target_price;
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IF @last_price IS NOT NULL AND @last_date IS NOT NULL
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BEGIN
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SET @reason = CONCAT(
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'Last price ignored (too old: ',
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CONVERT(NVARCHAR(10), @last_date, 120),
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'), using target price'
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);
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END
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ELSE
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BEGIN
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SET @reason = 'Target price - no prior sale';
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END
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END
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ELSE
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BEGIN
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SET @price = NULL;
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IF @last_price IS NOT NULL AND @last_date IS NOT NULL
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BEGIN
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SET @reason = CONCAT(
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'Last price ignored (too old: ',
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CONVERT(NVARCHAR(10), @last_date, 120),
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'), no pricing available'
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);
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END
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ELSE
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BEGIN
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SET @reason = 'No pricing available';
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END
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END
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INSERT INTO @result VALUES (@price, @reason);
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RETURN;
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END
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GO |