pg...@mohawksoft.com wrote:
Sorry to bring this up, I know you've been fighting about XML for a while.
Currently, I am using XML2 functionality and have tried to get the newer
XPath function to work similarly, but can't quite seem to do it.
I think the current xpath function is too limited. (The docs said to post
problems to hackers if I have an issue.)
For instance, we have a web application that uses java with an XML class
serializer/deserializer Xstream. It creates XML that looks like this:
<com.company.local.myclass>
<uuid>b5212259-a91f-4dca-a547-4fe89cf2f32c</uuid>
<email>j...@somedomain.com</email>
</com.company.local.myclass>
My current strategy is to use xml2 as:
select xpath_string(datum, E'/com\.company\.local\.myclass/uuid) as uuid
from table;
Which produces a usable:
b5212259-a91f-4dca-a547-4fe89cf2f32c
I have been trying to use xpath
select xpath(E'/com\.company\.local\.myclass/uuid', XMLPARSE(CONTENT
datum)) as uuid from table;
Which produces an unusable:
{<uuid>b5212259-a91f-4dca-a547-4fe89cf2f32c</uuid>}
This is really a usage question, which doesn't belong on -hackers.
However, here is how to do what you want:
andrew=# select
(xpath($$/com.company.local.myclass/uuid/text()$$,$$<com.company.local.myclass>
<uuid>b5212259-a91f-4dca-a547-4fe89cf2f32c</uuid>
<email>j...@somedomain.com</email>
</com.company.local.myclass>
$$::xml))[1]::text as uuid;
uuid
--------------------------------------
b5212259-a91f-4dca-a547-4fe89cf2f32c
(1 row)
cheers
andrew
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