使用没有命名空间的XML加速SQl查询

Question

有没有办法加快速度？没有命名空间。

SELECT t1.*
FROM table1 AS t1 WITH (nolock)
    LEFT OUTER JOIN
    table2 AS t2 WITH (nolock)
ON t1.term_uid = t2.term_uid
WHERE t1.code IN 
         ('305.1', 'Z72.0', 'F17.200') OR 
     t2.term_code
     ('(/Attributes/Attribute[@name="myName"]/text())[1]', 'varchar(20)') IN
         ('305.1', 'Z72.0', 'F17.200');