"Ismail Kizir" <ikizir@teklan.com.tr> writes:
> I tried to code the example below but it responded with error message
> something like '$= operator not defined for types int4 and float8 ...'
That's a known bug in plpgsql. You can work around it by putting spaces
acround the '=' operator (you may need them around other operators too).
I assume it'll get fixed properly for 6.6...
regards, tom lane