Php-Txt-Db-Access Error:
Column '' not found

Php-Txt-Db-Access Error:
Query 'SELECT * FROM products WHERE product_id =' failed

Fatal error: Call to a member function getColumnNames() on a non-object in /mnt/web1/20/38/5656738/htdocs/store/lib/digitalgoods_db_functions.php on line 263