Hi,
in my special case I’d like to check if a XML[] is empty, because postgres doesn’t implement any equality operators, this is not a ‘simple’ task.
My current solution is:
SELECT * FROM sometable WHERE XMLSERIALIZE(CONTENT ((XPATH('/a:bar, somexmlcolumn, ARRAY[ARRAY['a', 'http://foo]]))[1]) AS text)<>''
But there must be a better way – maybe I missed something important - I also tried queries like the following:
SELECT * FROM sometable WHERE (XPATH('/a:bar', somexmlcolumn, ARRAY[ARRAY['a', 'http://foo']]))<>('{}'::XML[])
Any ideas and feedback are welcome.
Cheers, Tobias
