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

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