-- Migration: Change transaction_date from DATE to DATETIME
-- This migration updates the transaction_date column to store both date and time.
-- Run this SQL on your MySQL database.

-- Step 1: Modify the column type (preserves existing data - dates will have 00:00:00 time)
ALTER TABLE `transactions` MODIFY COLUMN `transaction_date` DATETIME NOT NULL;

-- Step 2 (Optional): Migrate existing transaction_time data into transaction_date
-- This updates existing records to combine date + time into the transaction_date column
-- Only run this if you have existing data that you want to preserve time info for
UPDATE `transactions` 
SET `transaction_date` = TIMESTAMP(DATE(`transaction_date`), IFNULL(`transaction_time`, '00:00:00'))
WHERE `transaction_time` IS NOT NULL;

-- Note: After running this migration, the transaction_time column is no longer used
-- but is kept for backward compatibility. New transactions will store full datetime
-- in the transaction_date column.