"Jan B." <jan(at)monso(dot)de> writes:
> Does anyone know, if it is intended that one query can create multiple
> result tables with some of them carrying an empty string as cmdStatus?
> Perhaps this is a bug?
Yes it is, and no it isn't. Check the archives --- there was extensive
discussion of what multi-command rules should return, a couple years
back when we settled on the current behavior.
regards, tom lane