The following bug has been logged on the website:
Bug reference: 8242
Logged by: boraldomaster
Email address: boraldomaster(at)gmail(dot)com
PostgreSQL version: 9.1.2
Operating system: any
Description:
When I get this message I cannot guess from it's description what really
causes this error.
I would like to see exactly the subquery that returned more than one column
and the row where this happened.