On 3/13/18 15:21, Thomas Kellerer wrote: > I still think it's incorrect to return an empty (=invalid) XML instead of a > NULL value though.
This behavior is specified in the SQL standard. While an empty string is not a valid XML "document", it is valid as XML "content". -- Peter Eisentraut http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
