在teradat中获取语法错误。这个查询有什么问题？

Question

SELECT sysxml.XPathValue(O.CAST(xmlOrder VARCHAR(1000) CHARACTER SET UNICODE), '//ORDER/PO_NUMBER/*') AS PO_Number,
       sysxml.XPathValue(O.CAST(xmlOrder VARCHAR(1000) CHARACTER SET UNICODE), '//ORDER/DATE/*') AS theDate
FROM   COMMON.OrderLog O
WHERE  sysxml.XPathValue(O.CAST(xmlOrder VARCHAR(1000) CHARACTER SET UNICODE), '//ORDER/BILLTO/*') = 'Mike';

Answer 1

CAST不属于O，xmlOrder可能属于。{。} 所以不要这样：

O.CAST(xmlOrder ...

您可能需要在所有三行中执行此操作：

CAST(O.xmlOrder ...