[check_postgres] custom_query with latest nagios

[Christoph Berg]

Re: mathias.rudolph at remondis.de 2016-09-14 <OF452D64CB.638399CC-ONC125802E.005528A1-C125802E.0055A34A at rethmann.de>
> (AS) name 1
> 
> This happens only when using check:_mk_agent. When I run the plugin by 
> myself everything looks fine.
> 
> Is there any known solution?

To me, this looks like a problem with check_mk, not check_postgres.
Make sure check_postgres is really called with the arguments and as
the user it is supposed to.

Christoph