Re: pg_attributte, data types - Mailing list pgsql-sql

Viktor Bojović <viktor.bojovic@gmail.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