Re: Is float8 a reference type?

On Sat, Sep 23, 2017 at 9:40 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> I wonder whether you're using up-to-date Postgres headers (ones
> where Float8GetDatum is a static inline function).

I'm building against 9.6.3 on both machines. I'm not doing anything
special to change the compilation options. Here is my whole Makefile:

MODULES = floatfile
EXTENSION = floatfile
EXTENSION_VERSION = 1.0.0
DATA = floatfile--$(EXTENSION_VERSION).sql

PG_CONFIG = pg_config
PGXS := $(shell $(PG_CONFIG) --pgxs)
include $(PGXS)

But what I'm really interested in is this: What are the bad things
that can happen if I do `datums = (Datum *)floats`, as long as it's
only when Datums are 8 bytes wide? Is there a platform with
pass-by-val float8s where that won't work?

Thanks,
Paul