-- Add completed_units column to work_allocations table
-- Run this migration to support tracking completed units separately from total units
-- Note: MySQL 8.0 does not support IF NOT EXISTS for ADD COLUMN

-- Check if column exists before running:
-- SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'work_allocations' AND COLUMN_NAME = 'completed_units';

-- Add the column (will error if already exists)
ALTER TABLE work_allocations 
ADD COLUMN completed_units DECIMAL(10,2) DEFAULT 0 AFTER units;

-- Update existing records to set completed_units equal to units for completed allocations
UPDATE work_allocations 
SET completed_units = units 
WHERE status = 'Completed' AND units IS NOT NULL;