Fix Split Bill

migrations/000033_add_remaining_amount_to_orders.down.sql

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+-- Remove constraint
+ALTER TABLE orders DROP CONSTRAINT IF EXISTS check_remaining_amount_non_negative;
+
+-- Remove remaining_amount column from orders table
+ALTER TABLE orders DROP COLUMN IF EXISTS remaining_amount; 

migrations/000033_add_remaining_amount_to_orders.up.sql

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+-- Add remaining_amount column to orders table
+ALTER TABLE orders ADD COLUMN remaining_amount DECIMAL(10,2) DEFAULT 0.00;
+
+-- Update existing orders to set remaining_amount equal to total_amount
+UPDATE orders SET remaining_amount = total_amount WHERE remaining_amount = 0.00;
+
+-- Add constraint to ensure remaining_amount is not negative
+ALTER TABLE orders ADD CONSTRAINT check_remaining_amount_non_negative CHECK (remaining_amount >= 0.00); 

migrations/000034_add_split_type_to_payments.down.sql

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+-- Remove constraint
+ALTER TABLE payments DROP CONSTRAINT IF EXISTS check_split_type_valid;
+
+-- Remove index
+DROP INDEX IF EXISTS idx_payments_split_type;
+
+-- Remove split_type column from payments table
+ALTER TABLE payments DROP COLUMN IF EXISTS split_type; 

migrations/000034_add_split_type_to_payments.up.sql

@@ -0,0 +1,8 @@
+-- Add split_type column to payments table
+ALTER TABLE payments ADD COLUMN split_type VARCHAR(20);
+
+-- Add index for better query performance
+CREATE INDEX idx_payments_split_type ON payments(split_type);
+
+-- Add constraint to ensure split_type is valid
+ALTER TABLE payments ADD CONSTRAINT check_split_type_valid CHECK (split_type IS NULL OR split_type IN ('AMOUNT', 'ITEM'));