ERROR:You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'AND category IS NULL AND subcategory IS NULL) OR 
                        (ca...' at line 2<br />Last Executed Query:SELECT percent FROM `fxr_discount` 
                        WHERE ( (brand =  AND category IS NULL AND subcategory IS NULL) OR 
                        (category =  AND brand = ) OR
                        (subcategory =  AND brand = ) OR
                        (category =  AND brand IS NULL) OR
                        (subcategory =  AND brand IS NULL) ) AND 
                        start_date <= NOW() AND end_date >= NOW() 
                        ORDER BY percent DESC LIMIT 1<br />
<b>Fatal error</b>:  Uncaught exception 'Exception' with message 'SQL_EXEPTION' in /home/fx/public_html/classes/database/ff_sql.class.php:317
Stack trace:
#0 /home/fx/public_html/classes/database/ff_sql.class.php(283): FF_SQL-&gt;Query('SELECT percent ...')
#1 /home/fx/public_html/mods/shoppingCart.php(23): FF_SQL-&gt;getQueryRow('SELECT percent ...')
#2 /home/fx/public_html/classes/core/modLoader.class.php(69): ShoppingCartModule-&gt;load()
#3 /home/fx/public_html/classes/core/Site.class.php(515): modLoader-&gt;execute('After_Init_Core')
#4 /home/fx/public_html/classes/core/Site.class.php(818): Site-&gt;InitCore()
#5 /home/fx/public_html/index.php(43): Site-&gt;__construct()
#6 {main}
  thrown in <b>/home/fx/public_html/classes/database/ff_sql.class.php</b> on line <b>317</b><br />