Re: ERROR: ExecutePlan: (junk) `ctid' is NULL!

"Jim C. Nasby" <jim@nasby.net> writes:
> stats=> UPDATE Tsummary
> stats->     SET participants = count(distinct credit_id)
> stats->             , teams = count(distinct team_id)
> stats->     FROM email_contrib_today ect
> stats->     WHERE ect.project_id = :ProjectID
> stats-> ;
> ERROR:  ExecutePlan: (junk) `ctid' is NULL!

We really oughta reject UPDATE commands with aggregates at the top
level.  It's not well-defined, it's illegal per SQL spec, and it tends
to get the executor all confused ...

            regards, tom lane