ALTER TABLE users
ADD COLUMN IF NOT EXISTS deletion_requested_at TIMESTAMPTZ,
ADD COLUMN IF NOT EXISTS deletion_scheduled_at TIMESTAMPTZ,
ADD COLUMN IF NOT EXISTS deletion_cancelled_at TIMESTAMPTZ;

CREATE INDEX IF NOT EXISTS idx_users_deletion_scheduled_at
ON users (deletion_scheduled_at)
WHERE deletion_scheduled_at IS NOT NULL;

CREATE INDEX IF NOT EXISTS idx_users_deletion_due
ON users (deletion_scheduled_at, id)
WHERE deletion_scheduled_at IS NOT NULL;