On Tue, Mar 26, 2024 at 2:05 PM ft <ml@ft-c.de> wrote:
Hello,
I have a postgresql database table with xml data. What I need is a list of all elements and attributes. Example: <area> <sub> <sub2 attr='1'>comment</sub2> <sub2 attr='2'>comment</sub2> <sub> </area>
The result should be: /area /area/sub /area/sub/sub2 /area/sub/sub2@attr /area/sub/sub2 /area/sub/sub2@attr
or distinct (it's enough) /area /area/sub /area/sub/sub2 /area/sub/sub2@attr
Is there a postgresql function to build this list?
I think it can be done but it'll be a painful function. I'd personally recommend writing this in a higher level language that deals with xml as rationally as it is possible to deal with xml (which is very unfriendly to most programming languages). Possibly you could consider using a PL/Python extension if you want processing to happen on the server, but I have no idea about security/resource consumption implications of that approach. But if you can get Python's lxml installed on your Pg server, having a library like that would (for me) make this function a lot easier to write..