这个问题看起来真的很讨厌。我在名为“Message”的列中有以下小XML,我想查询它。我遇到的问题是“ClaimData”元素。如您所见,它将其名称空间设置为空字符串。
<DataExchange xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://schemas.abc.com/library/DataExchange">
<Data>
<ClaimData xmlns="">
<CurrentClaimNumber>TEST0000319001</CurrentClaimNumber>
</ClaimData>
</Data>
</DataExchange>
下面的查询返回XML列的NULL值,因为ClaimData元素使用空命名空间,我不知道如何在XML列的查询中指出这一点。
有人可以提供一个工作(并且希望经过测试)的例子,说明如何在XML Message列中查询“CurrentClaimNumber”元素(它是“ClaimData”的子元素)?
非常非常感谢。
WITH XMLNAMESPACES (
'http://www.w3.org/2001/XMLSchema' AS "xsd",
'http://www.w3.org/2001/XMLSchema-instance' AS "xsi",
DEFAULT 'http://schemas.rising.com/library/DataExchange'
) SELECT [StoredMessageID],
Message.value('(/DataExchange/Data/ClaimData/CurrentClaimNumber)[1]', 'CHAR(750)')
FROM [DataExchange].[dbo].[MessageStorage]
答案 0 :(得分:3)
如何将默认命名空间分配给前缀,以便您可以使用null命名空间而不使用空命名空间?这可能是唯一的选择:
WITH XMLNAMESPACES (
'http://www.w3.org/2001/XMLSchema' AS "xsd",
'http://www.w3.org/2001/XMLSchema-instance' AS "xsi",
'http://schemas.abc.com/library/DataExchange' AS "de"
) SELECT [StoredMessageID],
Message.value('(/de:DataExchange/de:Data/ClaimData/CurrentClaimNumber)[1]',
'CHAR(750)')
FROM [DataExchange].[dbo].[MessageStorage]
验证如下:
insert into MessageStorage values('
<DataExchange
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://schemas.abc.com/library/DataExchange">
<Data>
<ClaimData xmlns="">
<CurrentClaimNumber>TEST0000319001</CurrentClaimNumber>
</ClaimData>
</Data>
</DataExchange>');
WITH XMLNAMESPACES (
'http://www.w3.org/2001/XMLSchema' AS "xsd",
'http://www.w3.org/2001/XMLSchema-instance' AS "xsi",
'http://schemas.abc.com/library/DataExchange' AS "de"
) SELECT [StoredMessageID],
Message.value('(/de:DataExchange/de:Data/ClaimData/CurrentClaimNumber)[1]',
'CHAR(750)')
FROM [dbo].[MessageStorage]
结果:
1 TEST0000319001