marc(at)daelemans(dot)com writes:
> select i, i&11 as j from generate_series ( 1, 100 ) i ;
> generates correct results on Win7 SP1, x64; 16GB machine, and
> erroneous results on another PC (Win8.1, x64, GB RAM).
I'm suspicious that you have some extension that redefines the & operator
and is installed on just one of the two machines. Running "\do &" in
psql on both systems would be informative.
regards, tom lane