-- Add lastboottime column to machines table for PC uptime tracking
-- Run on production database
-- Date: 2025-12-09

-- Check if column exists before adding
SET @dbname = DATABASE();
SET @tablename = 'machines';
SET @columnname = 'lastboottime';
SET @preparedStatement = (SELECT IF(
  (
    SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS
    WHERE TABLE_SCHEMA = @dbname
    AND TABLE_NAME = @tablename
    AND COLUMN_NAME = @columnname
  ) > 0,
  'SELECT ''Column lastboottime already exists'';',
  'ALTER TABLE machines ADD COLUMN lastboottime DATETIME NULL DEFAULT NULL AFTER lastupdated;'
));

PREPARE alterIfNotExists FROM @preparedStatement;
EXECUTE alterIfNotExists;
DEALLOCATE PREPARE alterIfNotExists;

-- Verify the column was added
SELECT COLUMN_NAME, DATA_TYPE, IS_NULLABLE, COLUMN_DEFAULT
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_SCHEMA = DATABASE()
AND TABLE_NAME = 'machines'
AND COLUMN_NAME = 'lastboottime';