27 lines
1.4 KiB
SQL
27 lines
1.4 KiB
SQL
-- Migration: Add expiry date and low-stock threshold tracking
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-- Issues: #63 (expiry tracking), #67 (low-stock threshold)
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-- Created: 2026-02-25
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-- Note: expiry_date already exists as DATE type. Adding expires_at as TIMESTAMPTZ for consistency
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-- and low_stock_threshold for threshold tracking.
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-- Add expires_at column for precise expiry date/time tracking (complementing existing expiry_date)
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-- We'll keep both: expiry_date (DATE) for simple day-based expiry, expires_at (TIMESTAMPTZ) for precise tracking
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ALTER TABLE inventory_items
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ADD COLUMN expires_at TIMESTAMP WITH TIME ZONE DEFAULT NULL;
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-- Add low_stock_threshold column for low-stock alerts
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ALTER TABLE inventory_items
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ADD COLUMN low_stock_threshold NUMERIC(10,2) DEFAULT NULL;
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-- Add comments for documentation
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COMMENT ON COLUMN inventory_items.expires_at IS 'Optional precise expiration timestamp. Complements expiry_date for items needing time-specific expiry.';
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COMMENT ON COLUMN inventory_items.low_stock_threshold IS 'Minimum quantity threshold. Item is considered low-stock when quantity <= threshold. Null means no threshold set.';
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-- Create index for efficient expiry queries (finding items expiring soon)
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CREATE INDEX idx_inventory_items_expires_at ON inventory_items(expires_at) WHERE expires_at IS NOT NULL;
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-- Create index for efficient low-stock queries
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CREATE INDEX idx_inventory_items_low_stock ON inventory_items(quantity, low_stock_threshold)
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WHERE low_stock_threshold IS NOT NULL;
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