can't shrink relation

["Sabin Coanda" <sabin.coanda@xxxxxxxxxxxxx>]

Hi there,

I have a database with lowest possible activity. I run VACUUM FULL AND I get 
the following log result: 



---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
       choose an index scan if your joining column's datatypes do not
       match