Paul Brinkmeier
1a34486a84
Report now has a 'total' column next to the 'inventory' column. Also, for items that are not empty yet we use the current time instead of the most recent sale to estimate time until empty.
50 lines
1.3 KiB
SQL
50 lines
1.3 KiB
SQL
WITH
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most_recent_sales AS (
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SELECT DISTINCT ON (inventory_line)
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inventory_line, snack_sales_log_id, snack_sales_log_timestamp AS most_recent_sale
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FROM garfield.snack_sales_log
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ORDER BY inventory_line ASC, snack_sales_log_timestamp DESC
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),
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enhanced_overview1 AS (
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SELECT
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inventory_items.item_id,
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inventory_items.item_barcode,
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inventory_items.name,
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units_left,
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inventory_items.sales_units,
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correction_delta,
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location_name,
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location,
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CASE
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WHEN snack_sales_log_id IS NULL THEN 0
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ELSE sales / (EXTRACT(EPOCH FROM (
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CASE
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WHEN units_left <= 0 THEN most_recent_sale
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ELSE NOW()
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END
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)) - EXTRACT(EPOCH FROM bought)) * 24 * 3600
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END AS per_day
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FROM garfield.inventory_item_overview
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LEFT JOIN garfield.inventory_items USING (item_id)
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LEFT JOIN most_recent_sales ON item_id = inventory_line
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),
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enhanced_overview2 AS (
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SELECT
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*,
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CASE
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WHEN per_day = 0 THEN NULL
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ELSE GREATEST(0, units_left / per_day)
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END AS days_left
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FROM enhanced_overview1
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)
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SELECT
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*,
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CASE
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WHEN days_left IS NULL THEN NULL
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ELSE GREATEST(0, (60 - days_left) * per_day)
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END AS for_two_months
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FROM enhanced_overview2
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WHERE (%(location_id)s IS NULL OR location = %(location_id)s)
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ORDER BY days_left ASC, per_day DESC
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