XPath query in DB2

Question

I'm performing the following query in DB2 on a XML column and it works fine:

SELECT  
FROM customer
WHERE contains(search_text, 
'
@xpath:''/customer/number[. contains("123456")]''
', 'RESULTLIMIT = 100')=1;

but the following query doesn't work:

SELECT  
FROM customer
WHERE contains(search_text, 
'
@xpath:''/customer/number[. = "123456"]''
', 'RESULTLIMIT = 100')=1;

Any ideas why the second query doesn't work? The error I get is: ERROR [38H10] [IBM][DB2/LINUXX8664] SQL20423N Error occurred during text search processing on server "localhost" using index "CISC_CUSTOMER". The error message is ""IQQS0032E The query cannot be processe".

<customer>
<number>
123456
</number>
<firstname>
John 
</firstname>
<lastname>
Smith
</lastname>
</customer>

Answer 1

在DB2中，您只能在属性上使用“ =”，而在元素上只能使用“ contains”。