import odoo
import json

def get_table_metadata(cr, table_name):
    cr.execute("""
        SELECT column_name, data_type 
        FROM information_schema.columns 
        WHERE table_name = %s
    """, (table_name,))
    return cr.fetchall()

if __name__ == '__main__':
    db_name = 'lims_demo'
    registry = odoo.registry(db_name)
    with registry.cursor() as cr:
        metadata = {}
        tables = ['sale_order', 'sale_order_line', 'product_template', 'product_product']
        for table in tables:
            metadata[table] = get_table_metadata(cr, table)
        
        print(json.dumps(metadata, indent=4))