-- Add updated_at column if it doesn't exist
ALTER TABLE icon_experts ADD COLUMN IF NOT EXISTS updated_at TIMESTAMP WITH TIME ZONE DEFAULT timezone('utc'::text, now());

-- Function to handle updating the updated_at timestamp
CREATE OR REPLACE FUNCTION update_updated_at_column()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at = timezone('utc'::text, now());
    RETURN NEW;
END;
$$ language 'plpgsql';

-- Trigger to execute the function before each update
DROP TRIGGER IF EXISTS update_icon_experts_updated_at ON icon_experts;
CREATE TRIGGER update_icon_experts_updated_at
    BEFORE UPDATE ON icon_experts
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();