=?UTF-8?Q?Viktor_Bojovi=C4=87?= <viktor(dot)bojovic(at)gmail(dot)com> writes:
> while listing data types i have noticed that some types have underscore
> prefix but i don't know why is that. so im asking if somene can tell me.
> These are type examples:
> _char
> _float4
> _int2
> _oid
> _regtype
> _text
> _varchar
Those are array types. The normal convention is that foo[] is named
"_foo" under the surface.
regards, tom lane