Re: Questions about parsing boolean and casting to anyelement

Brendan Jurd <direvus(at)gmail(dot)com> writes:
> On Wed, Feb 18, 2009 at 2:40 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> After thinking about it for awhile, I don't like the notation anyway
>> --- it's not immediately obvious that a cast to anyelement should mean
>> something like that. What seems more sensible to me is to introduce
>> a function to get the type of an expression, so that you could write
>> something like

> We already have such a function, pg_typeof().

No, pg_typeof is a more-or-less ordinary function that delivers an OID
at runtime. What we need here is something that will work as a CAST
target, ie, it has to be treated as a type name at parse time.

regards, tom lane